Decoding Women's Health with Dr. Elizabeth Poynor

How can the research behind intermittent fasting help us rethink the way we approach our nutrition and our daily habits? Dr. Chris Rhodes has spent much of his career studying the science of fasting. He joins the show to unpack how fasting works in the body and what the research tells us about its potential benefits.
Dr. Rhodes earned his PhD in Nutritional Biochemistry at UC Davis and is also the co-founder of Mimio. We discuss why someone might try intermittent fasting - from longevity to weight loss - as well as the importance of strength training and personalized nutrition.
Links to resources mentioned in this episode:
For more studies on autophagy, check out: https://physoc.onlinelibrary.wiley.com/doi/full/10.1113/JP287938
and https://pubmed.ncbi.nlm.nih.gov/41372565/
Here's a meta-analysis looking at the effects of time restricted eating: https://pubmed.ncbi.nlm.nih.gov/41586347/
Note: the glycine data we mention is only in mice: https://pmc.ncbi.nlm.nih.gov/articles/PMC6516426/
Important caveat for this episode: the evidence is strongest in animal studies and human markers of aging. No intermittent fasting regimen has been shown to extend human lifespan or reduce mortality in humans.
Note: In this show, we use “women” as shorthand for people with XX chromosomes. We understand sex and gender are more complex, and acknowledge the experiences we describe reach beyond that word.
See omnystudio.com/listener for privacy information.

What can you do to make the most of your annual medical visit? Dr. Poynor is joined by Dr. Jennifer McGugins Hill, an internal medicine specialist at the Atria Health and Research Institute, to discuss how preventive care can help identify health concerns early. Plus, we unpack which labs and screenings are worth discussing with your primary care physician, why it's important to know your calcium score, and how to advocate for the care you need.
Links to resources mentioned in this episode:
Boston Heart Diagnostics offers specialty labs that your doctor can order for you, usually at a cost. They are not available as direct to consumer products, so if you're interested in them, talk with your care team. https://bostonheartdiagnostics.com/
For expert advice on how to properly log your blood pressure at home, please see this helpful article: https://content.atria.org/article/blood-pressure-cuffs-for-home-monitoring/
You can see the product she mentions here (no affiliate link): https://omronhealthcare.com/blood-pressure-monitors
An ECG or EKG stands for an electrocardiogram, which is a quick, safe, and painless medical test that records the electrical activity of your heart.
DEXA stands for dual-energy X-ray absorptiometry. It is an imaging test that uses low-dose X-rays to measure bone mineral density and body composition. They can be ordered by a physician in an academic medicine system and are also offered at standalone centers.
Cologuard is a stool test that looks for existing cancer. Colonoscopies look for cancer as well as polyps, which can be pre-cancerous and are removed during the colonoscopy procedure.
Note: In this show, we use “women” as shorthand for people with XX chromosomes. We understand sex and gender are more complex, and acknowledge the experiences we describe reach beyond that word.
See omnystudio.com/listener for privacy information.

Many women are turning to cannabis to help with sleep, anxiety, chronic pain, and other major health concerns. But figuring out what actually works for your individual needs can be surprisingly complicated.
Dr. Poynor speaks with neuroscientist and world-renowned medical cannabis expert Dr. Staci Ann Gruber about the science behind THC, CBD, and other cannabinoids. Together, they break down the potential benefits of cannabis for women’s health, how to navigate different products safely, and best practices for first-time users.
Links to resources mentioned in this episode:
Marijuana Investigations for Neuroscientific Discovery (MIND) Program at McLean Hospital
Women’s Health Initiative at Mind (WHIM)
Medicinal Cannabis: History, Pharmacology, And Implications for the Acute Care Setting
The Health Effects of Cannabis and Cannabinoids: The Current State of Evidence and Recommendations for Research
Marijuana impacts mood in bipolar disorder: a pilot study
Note: In this show, we use “women” as shorthand for people with XX chromosomes. We understand sex and gender are more complex, and acknowledge the experiences we describe reach beyond that word.
See omnystudio.com/listener for privacy information.

What if aging isn't something that simply happens to us, but something we can actually influence? Dr. Poynor is joined by Dr. Eric Verdin - the President and CEO of the Buck Institute for Research on Aging, the world's first institution dedicated solely to understanding why we age and how to do it better.
We break down the science behind why we age, the role of NAD in cellular energy and repair, how inflammation quietly accelerates decline, and what metabolism has to do with how long and how well we live.
Dr. Verdin also walks us through what the latest research says about what we can actually do today—from how we eat and exercise, to the emerging interventions that may one day change the trajectory of aging altogether. He also shares which interventions he’s tried himself and what he’s chosen to skip altogether.
Links to resources mentioned in this episode:
Although epigenetics has been studied for decades, a major breakthrough came in 2013, when geneticist Steve Horvath, PhD, developed the first widely applicable epigenetic clock—a DNA methylation-based biomarker that estimates biological age across multiple human tissues. https://link.springer.com/article/10.1186/gb-2013-14-10-r115
A landmark 2026 Science study found that human lifespan heritability is roughly 50%, more than double earlier estimates — once researchers separated deaths from external causes (accidents, infections) from deaths driven by intrinsic aging biology. https://www.science.org/doi/10.1126/science.adz1187
Senescent cells promote tissue NAD+ decline during ageing via the activation of CD38+ macrophages: https://www.nature.com/articles/s42255-020-00328-w
CD38 inhibitor 78c increases mice lifespan and healthspan in a model of chronological aging: https://pubmed.ncbi.nlm.nih.gov/35263032/
CD38 Inhibition Ameliorates Age-Related CognitiveDecline via a Choroid Plexus-Cerebrospinal Fluid-Hippocampus Axis: (This refers to preclinical (meaning animal model) research that was published as a pre-print and has not yet been peer reviewed.) https://pubmed.ncbi.nlm.nih.gov/41542058/
Healthy aging and muscle function are positively associated with NAD+ abundance in humans: https://www.nature.com/articles/s43587-022-00174-3
Pilot Study Evaluates Weekly Pill to Slow Ovarian Aging, Delay Menopause: https://www.nyp.org/advances/article/womens-health/pilot-study-evaluates-weekly-pill-to-slow-ovarian-aging-delay-menopause
Dr. Yousin Suh at the Department of Genetics and Development at Columbia University - you can read more about Dr. Suh’s work here: https://www.crs.northwestern.edu/about/news/2025/nbs-2025.html
Ageing in Drosophila: The role of the insulin/Igf and TOR signalling network: https://pmc.ncbi.nlm.nih.gov/articles/PMC3087113/
NIA Interventions Testing Program: Investigating Putative Aging Intervention Agents in a Genetically Heterogeneous Mouse Model: https://pmc.ncbi.nlm.nih.gov/articles/PMC5514387/
Publications from the NIA Interventions Testing Program: https://www.nia.nih.gov/research/dab/interventions-testing-program-itp/publications
The use of semaglutide medicines and risk of non-arteritic anterior ischemic optic neuropathy (NAION): https://www.who.int/news/item/27-06-2025-27-06-2025-semaglutide-medicines-naion
Dr. Eric Verdin LinkedIn page: https://www.linkedin.com/in/eric-verdin-490212
Dr. Eric Verdin on Substack: https://substack.com/@verdinlabbuck
Dr. Eric Verdin on Instagram: @ericverdinmd
Dr. Elizabeth Poynor substack: https://poynorhealth.substack.com/
Dr. Elizabeth Poynor on Instagram: @poynorhealth
Atria Health Library: content.atria.org
Note: In this show, we use “women” as shorthand for people with XX chromosomes. We understand sex and gender are more complex, and acknowledge the experiences we describe reach beyond that word.
See omnystudio.com/listener for privacy information.

What happens to a woman's mental health when she experiences a major hormonal shift and what can she actually do about it? Dr. Ruta Nonacs is a reproductive psychiatrist at Massachusetts General Hospital and a faculty member at Harvard Medical School. Her work sits at the intersection of hormonal health and women's mental well being.
We break down how changes across a woman's reproductive life—from PMS and PMDD to perimenopause and beyond—can affect mood, anxiety, and emotional health. Dr. Nonacs also walks us through treatment options, and when to seek help.
Links to resources mentioned in this episode:
Dr. Ruta Nonacs: https://researchers.mgh.harvard.edu/profile/14143654/Ruta-Nonacs
So Glad You Asked with Dr. Ruta Nonacs and Allie Hales: https://podcasts.apple.com/us/podcast/so-glad-you-asked-with-dr-ruta-nonacs-and-allie-hales/id1802653992
Essential Reads: Ovarian Suppression for the Treatment of Severe PMDD: https://womensmentalhealth.org/posts/essential-reads-ovarian-suppression-for-the-treatment-of-severe-pmdd/
Chasteberry: https://www.nccih.nih.gov/health/chasteberry
Co-administration of St. John's wort and hormonal contraceptives: a systematic review: https://www.contraceptionjournal.org/article/S0010-7824(16)30164-0/abstract
Note: In this show, we use “women” as shorthand for people with XX chromosomes. We understand sex and gender are more complex, and acknowledge the experiences we describe reach beyond that word.
See omnystudio.com/listener for privacy information.