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How Women Can Prioritize Health — and What to Check Annually
More than 6 in 10 women struggle prioritizing their health according to a survey, so Dr. Elisa Port, chief breast cancer surgeon at Mount Sinai and author of “Breast Advice,” joins TODAY with a closer look at the biggest issues and questions women face regarding their health. She breaks down the four Ws that help reduce risk of breast cancer, shares her recommendations for prioritizing screenings, and highlights the benefits and risks of hormone replacement therapy.
Global consortium renames polycystic ovary syndrome to reflect science
First, it was named after two men. Then, it was named for a false premise. Now, after more than a century, one of the most common hormone disorders affecting women worldwide has a name that reflects the science.
The Real Danger to Women Isn’t Hormone Therapy, It’s Bad Science
Are all hormones created equal? Drs Rachel Rubin and Kelly Casperson unpack the missing details in recent menopause research and explain why nuance matters.
How Perimenopause Became America's New Health Scare
If you’re a woman who speaks English, it sometimes feels like you can’t spend time on the internet without being bombarded with all the ways in which your body or your mind could be just a little broken. A few years ago, Instagram was full of women talking about attention deficit disorder, and lo and behold: From 2020 to 2022, the percentage of women (between the ages of 23 and 49) newly diagnosed with it nearly doubled. Not long ago, premenstrual syndrome was all the rage, with the algorithm pushing videos that explained why it’s okay to fly off the handle once a month. These days, the word perimenopause is everywhere. Perhaps you’ve seen the headlines. “Perimenopause is having a millennial moment. Here are 7 ways to cope,” says The Washington Post. Or perhaps you’ve seen Apple TV’s glossy drama Your Friends & Neighbors, which is back for its second season; the female protagonist Mel is explicitly perimenopausal, and in the first season, she keyed a car for no apparent reason. She’s played by Amanda Peet, who talks about being perimenopausal in real life (“God knows I’ve wanted to key a lot of cars in the last three years,” she’s said.) In fact, it sometimes feels like every celebrity interview with a forty- or fiftysomething woman requires her to open up about what’s going on with her hormones. Drew Barrymore joked on CBS Mornings that when she found out how long perimenopause can last, she thought she’d “never make it 10 years like this.” Katherine Heigl told Business Insider that “whoever designed it so that women would be going through perimenopause while raising teenagers should be sent a strongly worded letter.” At the same time, influencers who talk about perimenopause seem to have cropped up out of nowhere with something to sell you, causing people online to wonder where this all came from. It’s trickled down from Instagram to tchotchke shops, which sell fridge magnets that say “Perimenopause Is Hot.” You can buy a T-shirt that proclaims “Perimenopause Made Me Do It!” My mom, who is 48, started uncontrollably shaking her leg at night a few years ago. “It’s perimenopause,” she told me when I complained about how annoying it was. But what exactly is perimenopause—and why are we all talking about it all of a sudden?
The creepy feeling in old buildings might have a surprising cause
A hidden force may be quietly shaping how you feel—and you’d never even know it. Infrasound, an ultra-low-frequency vibration below the range of human hearing, is everywhere from traffic to old buildings. In a small experiment, people exposed to it became more irritable, less engaged, and even showed higher levels of the stress hormone cortisol—despite having no idea it was present. The findings suggest our bodies can “sense” these vibrations without conscious awareness, potentially explaining eerie sensations in places like basements or supposedly haunted buildings.
The Internet Is Obsessed With Ovulation
What’s so great about a “natural” menstrual cycle?
Women can't get estrogen patches. Here's what the FDA is doing to help.
Estrogen patches, one of the most popular menopause treatments, have been in short supply this year. Now the FDA is working to fix it.
Scientists discover natural hormone that reverses obesity
A hormone called FGF21 can reverse obesity in mice by activating a newly identified brain circuit tied to metabolism. Surprisingly, it works in the hindbrain—the same region targeted by GLP-1 drugs like Ozempic and Wegovy—but through a completely different mechanism. Instead of suppressing appetite, FGF21 ramps up the body’s energy burning. This insight could pave the way for more targeted weight-loss and liver disease treatments.
Scientists develop 'light switch' for the love hormone
Researchers have developed a molecular "light switch" for the so-called love hormone oxytocin, offering new insights into how social behavior, partnership bonding, emotions, and mental health are wired ...
GLP-1 medicine improves liver health independent of weight loss, study finds
Researchers at Toronto's Sinai Health have found that semaglutide—the active ingredient in popular weight loss drugs that mimic the gut hormone GLP-1—acts directly on a subset of liver cells to improve ...
Health expert explains link between women's hormones, stress
Functional medicine practitioner Jennifer Gularson highlights how physiological shifts like menopause can trigger significant stress and hormone imbalances.
Health expert explains link between women's hormones, stress - and what to do about it
In honor of National Stress Awareness Month, health experts are drawing attention to the internal physiological shifts that contribute to rising stress levels in women, specifically menopause and perimenopause.
Why Ozempic doesn’t work for everyone: Scientists just found a hidden reason
A new study reveals that popular diabetes and weight-loss drugs like Ozempic and Wegovy may not work as effectively for about 10% of people due to specific genetic variants. These individuals appear to have a puzzling condition called “GLP-1 resistance,” where their bodies produce higher levels of the hormone targeted by these drugs—but don’t respond to it properly.
Research Days slam winner highlights role of cortisol in health
Nebraska psychology student Max Lottes won the 2026 Student Research Days Slam with a dynamic presentation reframing cortisol as a vital stress hormone, highlighting the annual event’s decade-long role in showcasing graduate and undergraduate research.
If you aren’t losing weight with GLP-1 drugs, this may be one reason why
Two genes involved in gut hormones that influence appetite and digestion may be a factor in how people respond to GLP-1 drugs, according to a new study.
Sex at arm’s length? Male octopuses use specialised arm to mate, scientists find
Sensory organ in male cephalopod, known as hectocotylus, able to detect female hormone progesterone, even if male cannot see partner
How behavioral health supports women’s mental health
Women's mental health is shaped by hormones and life changes. Behavioral health care can help regulate emotions and reduce distress.
Menopause hormone therapy treatments would be covered by health insurance under Ohio bill
Ohio Democratic lawmakers want menopause hormone therapy treatments covered by health insurance and Medicaid.
Glyphosate: A story of science, risk, and nuance
In the summer of 2014, a California groundskeeper named Dewayne Johnson started noticing patches of raw, weeping skin spreading across his body. He had spent years applying Roundup, Monsanto’s glyphosate-based herbicide, for a school district, sometimes drenched in it when equipment malfunctioned. By 2014, he had a diagnosis: non-Hodgkin’s lymphoma. In 2018, a jury awarded him $289 million in damages, later reduced on appeal. Tens of thousands of lawsuits followed. The story hasn’t quieted down. It’s all over the internet, swinging between “this will kill you, buy organic” and “relax, you’re fear-mongering.” Some of that recent chatter stems from an Executive Order protecting glyphosate and its production, which set off intense infighting within the MAHA movement. Some of it reflects a deeper truth: Americans genuinely care about harmful chemicals in their environment (see poll below). And the conversation isn’t going anywhere, with a Supreme Court case involving Monsanto set for this April. Glyphosate (the active ingredient in Roundup) is one of the most widely used herbicides in the world. But does glyphosate cause cancer? And how much exposure is actually risky? With so much mistrust in institutions and corporations (and some genuine conflicts of interest), making sense of the actual scientific evidence is genuinely hard. Here is a translation of what the scientific evidence actually says. Does glyphosate cause harm? Glyphosate is an herbicide that kills most plants it contacts rather than targeting specific species. It works by blocking an enzyme pathway (EPSPS) that plants and many microorganisms need to produce essential amino acids. Without those amino acids, the plant can’t grow and dies. Glyphosate was first developed by Monsanto in the 1970s and became ubiquitous after the company introduced “Roundup Ready” crops in the 1990s. In 2024, Bayer removed glyphosate from residential Roundup-branded products due to litigation pressure. But today it is still the most widely used herbicide in the world. Farmers also discovered they could spray it directly on crops like oats, lentils, beans, and peas just before harvest to dry them out faster and make harvesting easier. Because of its widespread use, it’s obviously really important to understand if it’s harmful to humans. The key principle: The dose makes the poison The most important concept in toxicology is that “the dose makes the poison.” Sixteenth-century physician Paracelsus articulated what remains the foundational principle of toxicology: sola dosis facit venenum. Water will kill you if you drink enough of it. Aspirin saves lives at 81 milligrams and causes internal bleeding at higher chronic doses. So, at what dose is glyphosate poisonous? The LD50 in rats (the dose that kills half the test animals) is around 5,600 mg/kg body weight. Table salt is roughly 3,000 mg/kg. By that classic measure, glyphosate is less acutely toxic than salt. But some people are exposed to a lot of glyphosate through their work. And among the general public, there are many questions about low-dose, cumulative exposure from multiple sources over long periods. Does glyphosate cause health problems? Cancer Correlation maps are striking, with one analysis finding that 60% of counties that spray the most glyphosate have non-Hodgkin’s lymphoma rates above the national average. But correlation alone doesn’t establish cause, which is why animal and human studies matter. In animals: Rat studies are typically what most fear is rooted in, but most people don’t know the study details on the dosage given to rats. A pooled analysis of the 13 most rigorous rat studies found evidence that very high doses, around 55,000 times greater than typical food residue exposure, can cause certain cancers. In humans: One of the strongest studies followed 55,000 herbicide users over 20 years and found no overall increased cancer risk. There was one signal: among those with the highest use, rates of acute myeloid leukemia (AML) appeared elevated. A broader meta-analysis of 18 human studies also found no overall cancer risk, though a separate meta-analysis focused specifically on non-Hodgkin lymphoma found that people with high cumulative glyphosate exposure faced a 41% higher relative risk compared to those with low or no exposure. These human studies are observational studies (randomized controlled trials would be unethical), and meta-analyses are only as reliable as the studies they pool. But the story seems consistent: at very high exposure levels, there may be some cancer risk. But that’s about as far as the science currently takes us. Emerging research: gut and reproductive health Gut: Because glyphosate targets a pathway that exists in some gut bacteria, scientists have questioned whether it could affect the microbiome. In mice, a 2023 University of Iowa study found that glyphosate altered gut bacterial composition and raised markers of intestinal inflammation. A 2024 systematic review found similar patterns: disrupted gut bacteria and problems with the mucus layer that protects the intestinal wall in mice. Whether this translates to humans is an open question. The human gut is highly variable and resistant, and we don't yet have strong studies confirming the same effects in people. Reproductive health: Animal studies have found that glyphosate-based herbicides can interfere with reproductive hormones, including disrupting egg cell development in mice and reducing the number of eggs available in sheep’s ovaries. However, the doses used in these experiments were high, so it’s not yet clear whether the same effects would occur in humans. On the human side, a 2021 pilot study led by Mount Sinai researchers tested urine samples from pregnant women across the U.S. and found glyphosate in 95% of them. The study also found a possible connection between higher glyphosate exposure during pregnancy and a subtle physical difference measured in female newborns. That said, some connections weren’t statistically reliable and this was a small study. The researchers themselves said more and larger studies are needed before drawing firm conclusions. What do regulators say about glyphosate safety? In 2015, the International Agency for Research on Cancer (IARC), part of the World Health Organization, classified glyphosate as "probably carcinogenic to humans" (Group 2A). The classification is worth taking seriously. But, there’s an important distinction: IARC classifies hazard, meaning the potential to cause harm under some conditions. It does not assess risk, which accounts for actual exposure levels and the real-world probability of harm. The U.S. EPA, the European Food Safety Authority, Health Canada, and regulatory agencies in Australia and Japan have all concluded that glyphosate is “unlikely to be carcinogenic to humans” at realistic exposure levels. They’re asking a different question: given how much of this people actually encounter, what is the probability of harm? Your actual exposure is what determines your actual risk. What does glyphosate mean for your daily life? At the grocery store: Food residues are small. The EPA’s acceptable daily intake is 1.75 mg/kg of body weight per day. To hit that threshold from oatmeal alone, a 150-pound adult would need to eat roughly 50 pounds of oats every day. But this calculation addresses only one pathway (food), and we don’t yet have robust tools to measure people’s actual total exposure. If reducing exposure matters to you, organic certification prohibits synthetic herbicides, and organic oat products generally test at lower or undetectable levels. Either way, a diet rich in whole grains, conventional or organic, is far better for your health than one that omits them out of fear of residues. On the farm: Occupational exposure is orders of magnitude higher than consumer exposure. Farmers and farm workers who mix, load, and apply glyphosate-based herbicides, especially without protective equipment, face meaningfully different risk profiles. Proper PPE isn’t optional. Integrated weed management strategies that rotate chemical modes of action are also worth taking seriously, both for health and for long-term effectiveness. If you live near a farm: Spray drift is real. Concentrations near field edges can spike during and after application, particularly on windy days. This is an area where I think public health could really step up and empower rural communities with buffer zones, rather than placing the onus on individuals. But for now, knowing your local agricultural calendar and keeping windows closed during application are the first steps. Bottom line Dewayne Johnson was exposed to glyphosate at levels most people will never encounter, and a jury decided he deserved compensation. That outcome is not evidence that the oatmeal in your pantry is dangerous. But it is a reminder that the dose, the context, and the person doing the exposing all matter enormously. Glyphosate is a chemical tool with benefits, trade-offs, and genuine open scientific questions. Learning to hold that complexity without collapsing into panic or dismissal is, honestly, one of the most useful and hardest things to do in navigating modern health science. Love, YLE Your Local Epidemiologist (YLE) is founded and operated by Dr. Katelyn Jetelina, MPH PhD—an epidemiologist, wife, and mom of two little girls. Hannah Totte, MPH, is an epidemiologist and YLE Community Manager. YLE reaches more than 425,000 people in over 132 countries with one goal: “Translate” the ever-evolving public health science so that people will be well-equipped to make evidence-based decisions. This newsletter is free to everyone, thanks to the generous support of fellow YLE community members. To support the effort, subscribe or upgrade below: Subscribe
Seven foods to add to your diet for better hormone health, according to a doctor
You may have heard about hormone-balancing diets and certain dishes to tweak hormone levels. But is there such a thing as a hormone-balancing food?
Your Thymus and Your Healthspan
Our thymus gland plays a central role in the development or our immune system, specifically for supporting T cell development (how these cells got their name, maturation and differentiation in the thymus) and discriminating between self and foreign, non-self antigen proteins with production of dendritic cells. As we age, our thymus gland shrinks—the process known as involution—with progressive change from spongy to fatty tissue, with loss of functionality. But this process, with respect to timeline and extent, markedly varies from one person to the next. And to make things even more complicated, our thymus gland anatomy and precise location in the chest also is highly variable. So the famous Frank Netter diagrams from the 1960s (such as at left below) don’t capture the remarkable heterogeneity that a random set of 12 chest CT scans (below at right). What I consider as 2 landmark papers in Nature this week (here and here) used AI to quantify health of the thymus in 2 large cohorts, and then correlate the metric to a broad array of health outcomes. In this edition of Ground Truths, I’m going to cover three questions: (1) How was thymus health determined by AI?; (2) How is thymus health linked to key clinical outcomes? and (3) Are there ways we can promote a healthy (aka rejuvenate) thymus gland in our later years? Subscribe 1. How was thymus health determined by AI? This was accomplished by extensive work developing and validating an AI pipeline for 2 stages, the first for localization and segmentation of the thymus bed, and the second to quantify a digital marker, termed the thymic health score. There’s a lot to this algorithmic development, so I won’t go into all the details, but just provide a rudimentary outline of what was done. The 1st stage used supervised learning with 2 radiologists reviewing 2,461 chest CT scans. That work trained a 3D U-Net model to automatically identify the thymic bed’s 3D cropped region using center of mass coordinates, which reached 99.8% accuracy. The 2nd stage used a foundation model that was pre-trained with SwAV (which stands for Swapping Assignment between multiple Views), a self-supervised model, that generated a high-dimensional thymus representation of 4,096 features. That compares to the radiology reductionist and subjective scoring of 0 to 3 where 0 means the thymus is fully degenerated and fatty, and 3 is considered dense, intact glandular soft tissue. Notably, the self-supervised learning (SSL) performance was superior to supervised (AUC ~0.75 vs 0.55, respectively) reflecting the shallowness of the 0-3 classifier vs SSL’s holistic, self-taught AI. The thymic health score ranged from 0 to 100, with the highest number indexed to fully preserved thymic health. The algorithmic work extended to explainability with both Shapely value distribution, meaning the model was holistic not relying on any “magic” pixel, and occlusion sensitivity, demonstrating the model’s performance was not affected by ribs, sternum, lung tissue, but rather focused on the thymic bed directly. Below are a few saliency maps from the occlusion sensitivity that indicate the thymic bed focus, not affected by neighboring structures, using the jet color scale. Now the AI was ready for processing ~25,000 CT scans, each over 30 MB files, from the 2 large participant cohorts to provide a thymic health score, it did so in less than 14 hours, which is less than 2 seconds per scan! Share 2. How is thymus health linked to key clinical outcomes? The two cohorts were the National Lung Screening Trial, NLST (N=25,031) and the Framingham Heart Study, FHS (N=2,581) each with baseline demographics and long term follow up of >12 years for health outcomes. From the NSLT, you can see below that increased age and body-mass index were correlated to reduced thymic health. And, overall, men had reduced thymic health scores compared with women. There are a lot of graphs in the paper for outcomes, for both the NLST and FHS cohorts. To simplify the major outcomes, below is a composite Figure with striking reduction of all-cause mortality and for the different causes of death. The results were consistent between the 2 cohorts. For example, the cardiovascular mortality hazard ratio average was 0.57 in NLST and 0.38 in FHS (weighted to be 0.53 for the aggregate). The reduction of mortality also extended to digestive diseases and pulmonary disease (data not shown below). Lung cancer incidence was reduced by 36% for high vs low thymic health (Figure below, with a panel -incidence and b panel-mortality, adjusted for age, sex, BMI, smoking status). Notably, there was a smoker’s paradox: lower incidence and improved survival for lung cancer in smokers who had a high thymus health score. Smoking was associated with lower thymic scores whereas alcohol was not. Higher thymic health was linked to higher HDL cholesterol, lower triglycerides, lower fasting blood glucose, and lower systolic and diastolic blood pressure. Inflammation biomarkers, such as C-reactive protein and interleukin-6, were elevated in the people with lower thymic health scores. In their second paper, the same team looked at the relationship between thymic score and outcomes for 3,476 patients receiving cancer immunotherapy. The non-small cell lung cancer progression-free survival was reduced in patients with low thymic health score. A parallel relationship for survival was seen for other types of cancer including melanoma, breast, and kidney with a 44% lower risk among high thymic scores (Figure). A similar pattern was seen with different immune checkpoint inhibitors. The thymus health score outperformed programmed death ligand-1 (PD-L1)and tumor mutation burden (TMB) assay of the tumor and was an independent prognostic marker of progression-free survival. In this dataset, a direct connect with thymus score and adaptive immune function was noted with a correlation before cancer treatment for both T-cell diversity and thymus T-cell production (a metric known as T cell receptor excision circles). Thymus Removal Study There is a highly relevant citation about thymus function before moving onto ways to rejuvenate it. In 2023, a very important study of thymus removal during cardiothoracic surgery was published, with 1146 patients undergoing thymus removal vs 1146 matched controls (mean age 55 years). The adverse outcomes for thymus removal were striking, with a 2.9 higher risk of all-cause mortality and doubling of cancer incidence, 1.5 fold increase in cancer mortality, and 1.5-fold increase in autoimmune diseases. The immune function showed marked compromise after thymus removal, as reflected by CD4+ and CD8+ T cells (Figure below) Share Ground Truths 3. Are there ways we can promote a healthy (aka rejuvenate) thymus gland in our later years? In recent months we’ve learned a lot about the process of thymus involution and the pathways by which this may be modulated. Thymus involution is primarily due to loss to thymus epithelial cells (TECs) and there are 2 subtypes with different functions: the cortical, responsible for positive selection of T cells, and the medullary, for negative selection. When adipose tissue infiltrates the thymus, thymic adipocytes are pro-inflammatory, knocking out T-cell output. Likewise, systemic inflammation, or “inflammaging,” from smoking, obesity, and chronic stress promote thymic adipocytes. Now, from preclinical studies, we know about key pathways that account for these processes. Historically, back in 2014, FOXN1 was recognized as a single master transcription factor essential for TEC function, with studies in mice with forced FOXN1 upregulation leading to thymus regeneration. That laid the foundation for potential regrowth of quiescent thymus cells. It took awhile to find pathways to accomplish this goal and to even refute its role as the master regulator. The Liver-Thymus Axis Feng Zhang and his team recently showed that injection of an mRNA vaccine to the liver encoding DLL1, IL-7 and FLT3-L in combination, factors known to support thymopoiesis (Figure), successfully enhanced immune function in aged mice. However, the effect was transient. The FGF21 Story Two reports in 2025 addressed the thymus gland’s production of FGF21, a growth factor (fibroblast growth factor 21) and its control of thymus involution. This growth factor is also produced by the liver, but it doesn’t have impact on the thymus in aged rodent models. In contrast, The liver’s hepatocyte growth factor (HGF) has been shown to reverse senescent TEC structural changes. Growth hormone stimulates production of insulin growth factor-1 (IGF-1) in the liver and the thymus. Two small studies in human participants (TRIIM, for Thymus Regeneration, Immunorestoration, and Insulin Mitigation) of 6 and 50 people, respectively, treated with combined human growth hormone, metformin and DHEA, suggested the potential of slowing epigenetic aging and improving thymus mass and function. But the combination of drugs, small sample, and lack of controls make conclusions murky. Increased thymus FGF21 led to increased CD8 T cells in old mice and extended healthspan and improved physical performance. Building on the previous FOXN1 data, ablation of β-klotho, the obligatory co-receptor for FOXN1, accelerated thymic aging. The benefit to FGF21 was confirmed in a companion paper using an FGF21 knock-in mouse model showing thymus enlargement and increased TECs throughout the lifespan. (schematic Figure below). The accompanying editorial for these 2 papers speculated: “The proposed link between age-associated thymus involution and organismal aging is intriguing, and suggests we might seek to achieve systemic rejuvenation by counteracting thymic involution.” Other Factors Lessons from the Axolotl (Mexican Salamander) In an elegant set of experiments of the axolotl (Figure), known for its complete thymus regeneration after total surgical removal, mediators were identified. Surprisingly FOXN1 was dispensable. But midkine, a growth factor, appeared to be the driver, the initiator of thymus cell growth, survival, and repair. Other components that contributed were Postn+ (periostin-expressing mesenchymal niches) and Ccl19, a chemokine protein from the bloodstream. RANK and RANKL RANK (receptor activator of nuclear factor κB its ligand (RANKL) have been considered key regulators of medullary TECs. In a study of both aged mice and human thymus cell cultures, their key role was confirmed, with multiple benefits of resorting TEC function, recruitment of progenitor cells, and T cell development. Subscribe Summing Up This body of work strongly supports the health of the thymus gland as a critical regulator of human healthspan, not just a correlate or link. The new landmark studies are reinforced by the regenerative biology experimental models that have shown, via an array of mediators, that healthspan of aged mice is at least in part dependent on thymus gland function and its critical role for maintaining adaptive immunity. It sure seems that we’d be better off having an immune reservoir of naive T cells instead of a profile in older adults of exhausted, low quality, memory T cells, with a senescent phenotype. It is striking that we ignored the importance of the thymus gland for many decades. A wake-up call was the results of the thymectomy matched control study reviewed here, with the opposite of high thymic health score improved health outcomes. The convergence of AI and healthspan here is notable. The exceptional and laborious work for developing and validating (no less explaining) the AI to quantify thymus health set the foundation for probing the connect the major health outcomes in two cohorts with extensive follow-up. We’ve never had a way to meaningfully quantify the thymus gland before, so this represents important leverage of supervised, self-supervised, and transformer models. The study wouldn’t have been possible without AI. And it begs the question as to whether there are ways we can maintain our thymus at a high health score. But it’s not so simple to rejuvenate our thymus. There are multiple risks including the induction of autoimmunity, increasing the risk of cancer, and inducing a pro-inflammatory state. For example, factors that increase TEC proliferation could compromise the medulllary negative selection process and leak out auto-reactive (self-attacking) T cells. Thymic cells could be induced to proliferate, but we know, for example, that growth hormone and IGF-1 are associated with an increase risk of cancer. If thymus rejuvenation doesn’t clear out the accumulated senescent cells in older adults, then inflammation within the gland could block the production of TECs. Keeping these risks in mind, we now have identified many ways to keep our thymus healthy as we age that undoubtedly will be tested in clinical trials going forward. Ultimately, the benefit-to-risk tradeoffs will be defined. In the meantime, we have desperately needed an immunome. As I’ve stressed in multiple prior Ground Truths, we have no test in the clinic to assess a patient’s immune status! It was very encouraging for me to get an email from Hugo Aerts, the senior author of the landmark papers in the days after they were published: “I also wanted to say that your Substack on “Why We Need an Immunome” was inspiring for this work. We found it a very compelling perspective and greatly enjoyed reading it.” Just having an assessment of a person’s immune status via a chest CT scan, with millions of these performed per year, might help in guiding the right immunotherapy for cancer (e.g. more intensive, combinations for those with low thymic health scores) and help define people who are increased risk for age-related diseases of cancer, cardiovascular, and neurodegenerative. The main theme of Super Agers is that we now have many layers of data (genetics, proteins, biomarkers, organ clocks that can be integrated via multimodal AI) for us to define a person’s specific risk decades before one of these age-related diseases leads to symptoms, enabling prevention. From the new studies this week, we can add thymus health score as yet another way to understand a person’s risk, a window into their adaptive immune system and healthspan. And perhaps someday we will be able to safely rejuvenate the thymus, or maintain its health through one’s life, and use the thymus health score to monitor. NB: I wrote this post (No A.I.) A Quick Poll Loading... ********************************************************************* Thanks to Ground Truths subscribers (now > 200,000) from every US state and 212 countries. Your subscription to these free essays and podcasts makes my work in putting them together worthwhile. Please join! If you found this interesting PLEASE share it! Share Ground Truths Paid subscriptions are voluntary and all proceeds from them go to support Scripps Research. They do allow for posting comments and questions, which I do my best to respond to. Please don’t hesitate to post comments and give me feedback. Let me know topics that you would like to see covered. Leave a comment Many thanks to those who have contributed—they have greatly helped fund our summer internship programs for the past two years. It enabled us to accept and support 47 summer interns in 2025! We aim to accept even more of the several thousand who will apply for summer 2026.
Menopause Expert's 30-30-3 Hack to Improve Hormone and Gut Health
In TODAY.com's Expert Tip of the Day, a doctor specializing in women's health shares how this simple approach to diet can improve hormone and gut health.
Popular fruits and vegetables linked to higher pesticide levels
A sweeping new study reveals that what’s on your plate may directly shape the pesticides circulating in your body. Researchers found that people who eat more fruits and vegetables known to carry higher pesticide residues—such as strawberries, spinach, and bell peppers—also have significantly higher levels of those chemicals in their urine. While produce remains a cornerstone of a healthy diet, the findings highlight how everyday food choices can drive real-world exposure to substances linked to cancer, hormone disruption, and developmental harm.
Scientists turn methane into medicine in stunning breakthrough
Scientists have unveiled a breakthrough way to turn natural gas—long burned as fuel—into valuable chemical building blocks for medicines and other high-demand products. By designing a clever iron-based catalyst powered by LED light, researchers managed to activate stubborn molecules like methane and transform them into complex compounds, even creating the hormone therapy drug dimestrol directly from methane for the first time.
How Leptin Became the Sexiest Thing in Science (Again)
Thirty years after its discovery, scientists are eyeing leptin with renewed interest, for everything from weight loss drug cocktails to novel treatments for rare diseases and anorexia.
Women's Health Myths: Doctors say hormone therapy misinformation is rampant
Experts warn against turning to social media for advice about treating menopause symptoms.
How to Regulate Your Hormones With Gut Health, Movement, More
Millions of women struggle with the frustrating and often dismissed symptoms of perimenopause and menopause, so Dr. Amy Shah joins TODAY to help women reclaim their health with evidence-based advice from her new book “Hormone Havoc: A Science-Backed Protocol for Perimenopause & Menopause.” Tips include taking control of gut health, strength training and more.
Baystate Health will no longer prescribe hormones to trans youth
Threats to federal funding for Medicaid and Medicare prompted the decision.
Baystate Health ends hormone prescriptions for transgender youth under 18
The Springfield medical center is referring patients to another nonprofit so their care isn’t disrupted.
Baystate Health will stop prescribing hormones to transgender youth
More than 40 hospitals have stopped offering some gender-affirming care to transgender youth about a year after Trump’s executive order, according to published reports.
Why Valentine’s roses wilt — and how UT Arlington scientists are trying to stop it
With support from the USDA and the American Floral Endowment, scientists are developing new ways to block ethylene, the plant hormone that speeds wilting and...
A New Study Challenges the Mental-Health Claims of “Gender-Affirming Care”
Hong Kong researchers found that “affirming” surgeries and hormones yielded no significant improvements in depression and anxiety.
Ancient Chinese medicine may hold the key to hair regrowth
A centuries-old Chinese medicinal root is getting new scientific attention as a potential game-changer for common hair loss. Polygonum multiflorum, long believed to restore dark, healthy hair, appears to work on multiple fronts at once—blocking hair-shrinking hormones, protecting follicles from damage, activating natural regrowth signals, and boosting blood flow to the scalp.
Are peptides the fountain of youth? Doctors warn hype may outpace science
Peptide therapy gains popularity as an alleged anti-aging solution, but health experts warn of significant limitations and serious safety concerns.
Children’s Minnesota to pause some pediatric gender health services
Gender-affirming care for transgender youth remains legal in Minnesota, but the hospital says it will pause prescribing puberty-suppressing medications and pubertal hormones to patients under the age of 18.
Making science move: Organoids project re-imagines adrenal glands through models and motion
[vc_row][vc_column][vc_column_text css=””] In 2024, University of Georgia Associate Professor Nadja Zeltner received a grant to advance research in human cell generation, including adrenal gland organoids used to study disease. Adrenal gland organoids are tiny, lab-grown versions of your body’s stress response control center—adrenal glands release hormones in response to stress or excitement, regulate energy and … Continue reading “Making science move: Organoids project re-imagines adrenal glands through models and motion”
Are men being misled over testosterone?
In part one of a miniseries exploring the popularity of testosterone, Madeleine Finlay hears from Professor Channa Jayasena of Imperial College London, who is chair of the Society for Endocrinology, about how this craze is manifesting in NHS clinics, and from ‘Sam’ who tells Madeleine about his own journey with the hormone
How Do Menopause and a Treatment to Manage Its Symptoms Affect the Brain and Mental Health?
New research suggests an association between menopause and anxiety, depression and shrinkage in certain brain regions—which hormone replacement therapy might not mitigate
What is Hol+? Dr. Taz’s new holistic health hub explained
Learn how Hol+ blends functional, primary and lifestyle medicine to treat stress, hormone imbalance and metabolism for whole‑body wellness.
Scientists discover how the uterus knows when to push during childbirth
Childbirth depends not just on hormones, but on the uterus’s ability to sense physical force. Scientists found that pressure and stretch sensors in uterine muscles and surrounding nerves work together to trigger coordinated contractions. When these sensors are disrupted, contractions weaken and delivery slows. The discovery helps explain stalled labor—and could one day lead to better ways to manage childbirth.
Women's health research | FOX 13 Tampa Bay
Research shows that hormone replacement therapy can help reduce brain inflammation and diseases. FOX 13's Danielle Zulkosky reports.
Dose of uncertainty: Experts wary of AI health gadgets at CES
LAS VEGAS (AP) — Health tech gadgets displayed at the annual CES trade show make a lot of promises. A smart scale promoted a healthier lifestyle by scanning your feet to track your heart health, and an egg-shaped hormone tracker uses AI to help you figure out the best time to conceive.
Dose of Uncertainty: Experts Wary of AI Health Gadgets at CES
LAS VEGAS (AP) — Health tech gadgets displayed at the annual CES trade show make a lot of promises. A smart scale promoted a healthier lifestyle by scanning your feet to track your heart health, and an egg-shaped hormone tracker uses AI to help you figure out the best time to conceive. Tech and ...
Scientists Discover How the Uterus “Feels” Its Way Through Childbirth
Molecular discoveries may help improve treatments for labor and pain. When labor starts, the uterus must produce steady, precisely timed contractions to allow a safe delivery. Hormones such as progesterone and oxytocin are known to drive this process, but researchers have long believed that physi
19 states and D.C. sue HHS over effort to ban transgender care for minors
The declaration issued by the U.S. Department of Health and Human Services called treatments like puberty blockers, hormone therapy and surgeries unsafe and ineffective for children and adolescents experiencing gender dysphoria.
Inner Balance Brings New Approach to Women’s Hormone Health and Skin Care
With only two products on the market, Inner Balance is offering an alternative to long-standing treatment models in hormone therapy.
Watch live: RFK Jr. gives remarks on updated guidance for youth health care
Health and Human Services (HHS) Secretary Robert F. Kennedy Jr. will deliver remarks Thursday on new federal guidance related to health care for minors. The remarks come after Centers for Medicare …
RFK Jr.’s Health Department Is Pondering a National Men’s Health Initiative
At an FDA discussion of testosterone replacement therapy, a top official called for special health centers to address a “men’s health crisis.” Others called to ease men’s access to hormones.
Menopause treatment is getting personal
Menopause care innovations include at-home hormone testing, virtual appointments, and new non-hormonal therapies for symptom relief.
A New Chapter in Hormone Health: Dr. Rachel Fishman Oiknine Brings MDVIP's Personalized Model to St. Louis
Women in the St. Louis region will soon have access to a new model of personalized endocrinology care centered on women's health and long-term wellness. The new MDVIP-affiliated practice, led by Rachel Fishman Oiknine, MD, MSCP, marks a significant expansion of specialty care within the MDVIP network.
Commentary: Is RFK Jr. better on women's health than Newsom? We're about to find out
Halle Berry called out Gov. Gavin Newsom for vetoing a bill guaranteeing women access to menopause treatment. Earlier, the Trump administration removed 'black box' warnings from hormone therapy drugs.
Women’s Health Is Chronically Understudied and Underfunded. It’s Time for a Change
For millions of women, TikTok has become a doctor's office: Scroll through the app and you'll see endless videos about menopause, joint pain, hormone therapy – featuring no small amount of pseudoscience. Though misguided, this digital quest for medical knowledge is only a symptom of a larger issue:
Dog Parents, Rejoice: Science Says Your Pup Might Actually Help Your Teen’s Well-Being (Including Their Gut)
Like most parents of teens, you’re probably constantly trying to decode what actually supports your kids’ emotional well-being. Some days it feels like a moving target: school pressure, friendship drama, big emotions, changing hormones—it’s a lot. But one constant in your house could be… your dog. Your family pup can somehow manage to crack open …
The Sunshine Hormone’s Second Act: Why Science is Rethinking Vitamin D
New research reclassifies Vitamin D from a bone-health nutrient to a systemic steroid hormone, challenging public health guidelines. This deep dive explores the conflict between clinical trials and molecular biology, the potential for cancer and autoimmune prevention, and the future of personalized supplementation based on genetic metabolism.