Longevity Optimization with Kayla Barnes-Lentz

Muscle is not just something you build in the gym. Dr. Gabrielle Lyon has spent her career arguing it's the organ that actually determines how well you age, and almost none of us have been taught to think about it that way.

Dr. Gabrielle Lyon, DO, is the founder of Muscle-Centric Medicine and the New York Times bestselling author of Forever Strong. She's spent over two decades studying muscle as the most overlooked organ in medicine.

The line that stuck with me most: she believes we're on track to trade an obesity epidemic for a...

Brain aging does not start when memory loss shows up. It starts around age 25, decades before anyone notices anything is different. By the time a symptom appears, the window for the highest-leverage prevention has usually already closed.

Today I'm talking with Dr. Christin Glorioso, an MD and PhD who has spent her career studying Alzheimer's, partly because of her own family history and partly because she carries the ApoE4 gene herself. She has since used her own brain scans, blood work, and lifestyle changes to lower her own brain age, and she's built a company around helping...

Most people think of the gut as a digestive organ. It is not. It is the upstream controller of your metabolism, immune function, brain health, skin, and hormones and almost everyone is running it on a depleted, misfed microbiome without knowing it.

Dr. Colleen Cutcliffe, PhD is the co-founder and CEO of Pendulum Therapeutics, holds a PhD in biochemistry from Johns Hopkins, and spent over 15 years in pharma and biotech before pioneering next-generation probiotic science. Her team was the first in the world to manufacture Akkermansia, a strain found at high levels in virtually every centenarian population...

Dr. Elizabeth Yurth, co-founder of Boulder Longevity Institute, is one of the rare physicians who spent 30 years in orthopedic and sports medicine before pivoting to longevity and regenerative medicine. This episode covers joint health in women, osteoarthritis, bone density, peptides, perimenopause, hormones, mitochondrial health, and the regenerative protocols most women have never been offered.

What she found after decades of patching people together: we have been thinking about joint disease completely wrong. Osteoarthritis is not a wear and tear condition. It is a metabolic disease driven by mitochondrial dysfunction, hormonal decline, and chronic low-grade inflammation, and it...

Sleep is not just something women need more of. It is something women struggle with in ways that are fundamentally different from men and almost nobody explains why.

Dr. Wendy Troxel, PhD is one of the most respected sleep scientists in the world. Her research has shaped sleep policy in the US military. Her book, Sharing the Covers, is one of the most practical and science-backed guides to partnered sleep available. She is the rare researcher who can speak to the biology of sleep, the hormonal shifts of perimenopause, and what is actually happening in your bedroom...

Avoiding stress at all costs may actually be making you less resilient.

In this episode, Dr. Sharon Horesh Bergquist reframes stress as one of the body’s most overlooked tools for longevity. The right kind of challenge can activate repair, strengthen resilience, improve metabolic health, and help the body adapt in ways that support healthier aging over time. Rather than trying to eliminate stress completely, she explains how to use it more intelligently.

At the center of the conversation are five key stressors the body appears designed to benefit from when they’re used well: plan...

Heart disease is not only a man's disease. It is the number one killer of women, responsible for ten times more deaths than breast cancer. And yet most women have never had a real conversation about their cardiovascular risk, because the medical system was not built to catch it in them.

Dr. Martha Gulati is the Director of Preventive Cardiology and Associate Director of the Barbra Streisand Women's Heart Center at Cedars-Sinai, Director of the Davis Women's Heart Center at Houston Methodist, and author of Saving Women's Hearts. Her own quote has become one of the most...

Women are often told that painful periods, irregular cycles, bloating, mood changes, fatigue, brain fog, postpartum symptoms, and hormonal shifts are “normal.”

But common does not mean something should be ignored.

In this episode, Dr. Jolene Brighten, ND joins me for a practical deep dive into female-specific conditions that are too often missed, minimized, or treated in isolation, including endometriosis, adenomyosis, PMDD, PCOS/PMOS, fibroids, postpartum thyroid changes, and the gut-hormone connection.

Dr. Brighten explains why endometriosis is not just a reproductive condition, how adenomyosis differs from endometriosis, why PMDD is not simply “bad PM...

Less than 25% of people with IBS get real relief from conventional medicine. That number tells you everything about how the current approach is failing.

Most people with IBS have been told it is stress, told to take medication, and sent home. But irritable bowel syndrome is not one condition, it is a label applied to a cluster of symptoms that can have 20 to 40 completely different root causes. And left unaddressed, it is one of the most reliable predictors of autoimmune disease down the line.

In this episode I sit down with Dr. Izabella Wentz, clinical...

There is a state where the body gets locked in sympathetic activation and mitochondrial dysfunction at the same time and no matter what supplements you take, no matter what protocols you run, nothing actually works. Dr. Scott Sherr calls it the sympathetic spiral of doom, and in this episode we break down exactly what it is, why so many people are stuck in it without knowing it, and the right sequence to actually get out.

Dr. Scott is a board certified internal medicine physician, certified in hyperbaric oxygen therapy and health optimization medicine, and the chief medical...

Most women have had bloodwork done. What most women haven't had is the right bloodwork. 

In this episode, Dr. Poonam Desai, double board certified in lifestyle and emergency medicine, NAM certified in menopause care, and founder of Longevity Place and Her Longevity, breaks down the five labs she runs on every female patient, the optimal values most physicians aren't targeting, and why the standard panel tells you almost nothing about long-term cardiovascular risk, metabolic health, or inflammation. This is one of the most practical longevity conversations I've had for women who want to know where they actually s...

Most women are not thinking about their bones until a fracture happens or a scan comes back alarmingly. By then, the window for the most impactful intervention has often been narrowing for decades. Bone density peaks around age 18, not 30 as widely believed and the slow decline that follows is largely silent until it isn't.

Professor Belinda Beck, PhD has spent more than two decades studying exactly what it takes to stop and reverse that decline. She is a professor at Griffith University, founder of the Bloom Clinic in Brisbane, and the principal investigator behind the LIFTMORE trials...

In this episode, I’m joined by Dr. Dawn Mussallem, DO, an integrative oncologist, lifestyle medicine specialist, cancer survivor, heart transplant recipient, and the newly appointed Chief Medical Officer of Fountain Life.

We talk about why cancer rates are rising, what we actually know about prevention, and why early detection matters so much when it comes to long-term outcomes. We also discuss the role of exercise, sleep, fiber, metabolic health, toxins, alcohol, gut health, screening tools, mammograms, full-body MRI, liquid biopsies, and why the basics still matter more than most people want to admit.

Dr. Da...

Brian Kennedy is one of the world’s leading researchers studying the biology of aging.

In this conversation, we break down what longevity science actually shows about extending healthy lifespan and the everyday habits that appear to influence how we age.

Dr. Brian shares insights from decades of aging research, explaining how scientists study longevity, how interventions like rapamycin and biological age testing are evaluated, and how lifestyle factors such as exercise, nutrition, fasting, and sleep continue to shape the foundation of long-term health.

Join the most comprehensive *female-specific community for health and lo...

We're back with Dr. Szal! Today we are discussing a variety of topics: Gut health, peptides, hormone health , GLP-1's, bone health and so much more!In this conversation, Dr. Sara G dives into the gut-brain connection and explains how disrupting the microbiome can directly affect mood, anxiety, and overall mental resilience. She breaks down why even a single course of antibiotics can shift the balance of your gut in ways most people never consider, and what that means for how you feel day to day.This is where the gut-brain connection becomes practical, not theoretical. Instead of treating...

Bérénice Benayoun, PhD, explains why ovarian aging may be one of the earliest and most important drivers of female aging, influencing the brain, immune system, metabolism, and long-term disease risk far beyond reproduction. She breaks down what we actually know so far, including DNA damage, mitochondrial dysfunction, fibrosis, hormonal signaling, and why the ovary appears to age faster than other tissues.

We also get into one of the most surprising findings in the field right now: a brand new study from her lab found that post-reproductive gut microbiota unexpectedly improved ovarian reserve and lowered inflammatory si...

Most people can feel when stress is affecting them. Far fewer know whether their body is adapting well or quietly being pushed toward dysfunction.

In this episode, Dr. Deb Rivera, PhD in neuroengineering, explains the hidden biological system that helps determine how well your body handles stress. Her research focuses on redox balance and the glutathione ratio, a biomarker that may reveal whether your body is adapting to stress or slowly moving toward dysfunction.

Join the most comprehensive *female-specific community for health and longevity optimization.* After over a decade dedicated to human performance and women’s...

Brain health problems rarely begin where most people look. Memory issues, low mood, poor focus, anxiety, and even early cognitive decline can be driven by hidden inflammation and root-cause imbalances long before they show up the way most people expect.

In this episode, Dr. Eboni Cornish explains how chronic infections, mold, toxins, hormones, gut dysfunction, and oral or nasal microbial imbalances can all affect the brain, and why “mental health” often needs to be approached as brain health first.

She also shares how tools like brain imaging, inflammation markers, and functional testing can uncover patterns that...

Blood sugar stability may be one of the most important levers for long term health, yet most people never look at it.In this episode, I am joined by Jessie Inchauspé, widely known as the Glucose Goddess, to examine what glucose spikes are actually doing inside the body and why they matter even if you are not diabetic.We unpack how glucose spikes can influence your mood, focus, cravings, and energy levels, why blood sugar stability matters even if you are not diabetic, and how seeing your own patterns can completely change the way you approach food.Join the m...

Women are told to fast, cut carbs, eat high protein, avoid seed oils, and track macros, but most of that advice ignores female physiology.

In this episode, I’m joined by Dr. Deanna Minich, PhD, certified functional medicine practitioner and nutrition scientist. We walk through the Female Longevity Nutrition Protocol she created, including circadian timing, macro ranges by life stage, and how to stop getting whiplash from internet nutrition trends.

Join the most comprehensive *female-specific community for health and longevity optimization.* After over a decade dedicated to human performance and women’s health, I created this...

Cold exposure is not a badge of toughness. It’s a stressor.

And if you do it wrong, you can absolutely overdo it.

In this episode, I’m joined by Dr. Susanna Søberg, PhD, scientist and educator specializing in metabolism, cold and heat exposure, and longevity. We break down what cold exposure is actually doing in the body, why brown fat matters for metabolic health, and how women should think about timing cold exposure around PMS, luteal phase, and menstruation.

Join the most comprehensive *female-specific community for health and longevity optimization.* After over...

Pelvic floor problems are not a “just do more kegels” issue.For a lot of women, kegels are either not specific enough, or they make symptoms worse.

In this episode, Dr. Stephanie Riley Hahn, pelvic floor physical therapist and founder of Longevity and Pilates, breaks down what pelvic floor dysfunction actually is, how to tell weakness from tightness, and why pressure management and breathing mechanics often matter more than squeezing harder.

Join the most comprehensive *female-specific community for health and longevity optimization.* After over a decade dedicated to human performance and women’s health, I create...

Longevity isn’t just workouts, supplements, and recovery tools, it starts with nervous system health. 

In this episode, Dr. Aimie Apigian explains what trauma actually is (not a label, but a measurable physiological response), how the body shifts from stress into overwhelm, and why “pushing through” often turns into years of avoidance, numbing, and hidden internal strain.

She breaks down the biology behind the trauma response, including the role of adrenaline, cortisol timing, and how mitochondrial capacity influences resilience.

You’ll also learn her practical, body-based approach to creating “safe enough” in real time, plus th...

For the first time in history, ovarian biological age can be measured, and I became the first woman in the world to take the test.

Until now, women have had no real way to understand how their ovaries are aging beyond rough estimates like AMH. But this new machine-learning algorithm, trained on over 40,000 real women across different life stages, analyzes hormone biomarkers, body composition, and reproductive history to estimate ovarian age relative to chronological age.

This is a massive step forward in female longevity science.

Perimenopause is not just about hormones, it’s a metabolic transition that affects insulin sensitivity, gut health, stress tolerance, and long-term disease risk.

In this episode, Cynthia Thurlow, board-certified nurse practitioner and functional medicine expert, explains how women’s metabolism changes in midlife and why insulin resistance, poor stress resilience, and gut dysfunction often appear years before menopause.

She breaks down how perimenopause can begin earlier than most women expect, why symptoms vary so widely, and how lifestyle factors like fasting, exercise intensity, sleep, alcohol, and chronic stress interact with hormones during this transition.

Jo...

When cellular energy production is impaired, no diet, supplement, or health protocol can work as intended.

In this episode, Dr. Chris Masterjohn, nutrition scientist and expert in micronutrients and metabolism, explains why mitochondrial function is the limiting factor behind stalled progress, persistent fatigue, and supplements that stop working over time.

He breaks down why vitamin D supplementation often creates new problems when it is taken without proper nutrient balance, how high doses can disrupt other systems in the body, and why sunlight has biological effects that vitamin D pills alone cannot replicate.

Join...

In this episode, Dr. Jessica Shepard, board-certified OB/GYN and Chief Medical Officer of Hers, shares that the FDA just removed the black box warning on hormone replacement therapy after 23 years.

We discuss what actually happened with the WHI study that created all the fear around estrogen and breast cancer, and why the research never actually supported that narrative.
Dr. Shepard explains why you shouldn't wait until menopause to start the HRT conversation and how starting in your perimenopausal years can make all the difference for long-term health. Dr. Shepard shares the essential labs she runs on...

What if your blood is what’s making you sick and the key to reversing it is removing it?

In this episode, I sit down with Dr. Khanh Nguyen, a regenerative and anti-aging physician, to explore therapeutic plasma exchange and the rising use of young plasma. We talk detox, autoimmune disease, aging, peptides, and why your blood might be holding you back.

Join the most comprehensive *female-specific community for health and longevity optimization.* After over a decade dedicated to human performance and women’s health, I created this space to share everything you need...

Is your environment silently sabotaging your fertility?

Dr. Ann Shippy joins the show to reveal how hidden toxins, mold, and overlooked cellular damage may be accelerating ovarian aging and how to reclaim your fertility before it’s too late. From infertility misdiagnoses to rising autism rates, we dive deep into the tests most doctors never run, and the real impact your body’s toxic load has on future generations. 

Kayla's social + website:

Instagram:  kaylabarnes

TikTok:  femalelongevity

Twitter: https://x.com/femalelongevity

Website: https://www.kayla...

Ashley Koff is a registered dietitian and author who spent 20 years discovering that weight and health aren't separate issues, they're connected through "weight health hormones." After her own struggles with restrictive eating despite doing everything "right," a functional medicine doctor helped her understand what was actually broken, and that was, her body's natural hormone function.

In this episode, Ashley explains why GLP-1 medications like Ozempic work, who actually needs them, and the critical foundational work required to avoid devastating rebounds. She reveals why current dietary guidelines fail women, shares her free weight health hormone assessment, cuts through...

In this video, Dr. Will Bulsiewicz shares his transformation from an overweight, depressed gastroenterologist to a gut health expert after meeting his now-wife changed his entire approach to food. He reveals why 95% of Americans are fiber deficient and how this single nutrient could be the key to longevity. Dr. B breaks down the science of the gut microbiome, explains why hyperpalatable foods force us to overeat 500 extra calories per day, and shares actionable strategies for rebuilding your gut health in as little as 3-5 days.

Guest’s socials + website

Instagram: @theguthealthmd 

Website: https://thegu...

Women don’t fail January — January fails women. Nearly 80% of New Year health goals are abandoned within weeks, not because of discipline, but because most plans ignore female biology. That’s why I created the 30-Day Female Longevity Challenge — a physiology-first way to prepare calmly and build health that actually lasts. Save $50 with code 2026. https://kayla-barnes-lentz.circle.so/checkout/female-longevity-challenge-2026?coupon_code=2026When you join, you also get one full year access to my female membership for on-going accountability, my monthly AMAs, a female support community, access to my 20 other courses and more! Optimizing your home: https://www.youtube.com/watc...

In this conversation, Kayla sits down with Dr. Sarah E. Hill, PhD to talk about the science behind PMS, cycle syncing, and why most health advice completely fails women. Dr. Hill explains the three main causes of PMS symptoms, natural hormonal shifts, one-size-fits-all protocols designed for men, and lack of cellular resilience.

Join the most comprehensive female-specific community for health and longevity optimization. After over a decade dedicated to human performance and women’s health, I created this space to share everything you need to know to optimize health and lifespan. Inside, you’ll get...

For years, functional medicine has focused on lab results and supplement protocols. Dr. Deanna Minich knows there's a deeper layer most practitioners miss. As a nutrition scientist who worked under Dr. Jeffrey Bland and educated for the Institute for Functional Medicine, she's witnessed how artificial light at night disrupts women's hormones more than almost any other factor, yet it's completely ignored.
In this episode, Dr. Minich reveals why 85% of people are Omega-3 deficient despite supplementing, how eating a rainbow of 30+ plant species weekly rebuilds your microbiome diversity, and why your skin's "photo-metabolome" produces healing compounds from sunlight that...

Everyday “healthy” choices might be silently rewiring your immune system—from canned soup and tap water to perfume, makeup, and even your couch—while autoimmune diseases quietly explode, especially in women. In this gripping conversation, Dr. Aly Cohen reveals how under-regulated chemicals, hidden toxins, and epigenetic changes may be driving the autoimmune epidemic, but also how strategic swaps, smarter water, food, air, and a 4-A framework can actually change the destiny of your health. If you’ve ever wondered whether you can truly detox, reverse flares, and protect future generations, this episode turns overwhelming science into a suspenseful, empowering roadmap.<...

In this episode, Kayla sits down with Dr. Karan Rajan, who is one of the most followed medical professionals on social media, and he breaks down the gut microbiome like you've never heard before. If you've ever felt bloated after eating fiber, tried keto and felt amazing temporarily, or wondered why your "clean" diet isn't delivering results, this episode is for you.
They talk about why fiber is non-negotiable fuel for your gut bacteria, how to gradually increase intake from 10g to 50g+ daily, and the specific prebiotic fibers that matter most. Dr. Rajan shares his daily eating...

Your home could be triggering your allergies and nobody's checking. Dr. Tania Elliott sees patients struggling with reactions that disappear before they can get to the doctor's office. That's why she started doing virtual home tours to find what's really causing the problem.In this episode, Dr. Elliott explains why that new couch smell is actually toxic, how synthetic candles mess with your hormones, and why our obsession with being too clean backfired into an allergy epidemic. She digs into Mast Cell Activation Syndrome, shares why peanut allergies in kids went through the roof after we delayed introducing peanuts...

Are you planning to get pregnant, currently pregnant, or postpartum? This conversation with dietitian Lily Nichols will change how you think about nutrition during these critical life stages.Lily reveals that over 90% of women have nutrient deficiencies that directly impact fertility, pregnancy outcomes, and postpartum recovery. Most women have no idea they're lacking essential nutrients like protein, iron, zinc, B12, choline, and vitamin A until it's already affecting their hormones and ability to conceive. She explains why you need 7 to 8 months of preconception nutrition to build up nutrient stores before getting pregnant, the Goldilocks body fat percentage for optimal...

Are you dealing with unexplained fatigue, hormonal imbalances, brain fog, or chronic inflammation that doctors can't figure out?

In this episode, Dr. Jess Peatross explains why so many people are sick with "mystery symptoms" that doctors can't solve. She breaks down the toxins and infections making you sick, how to test for them properly, and her step-by-step "Kill Bind Sweat" detox method. So, if you've been told "it's all in your head" or that your labs are normal but you still feel awful, this episode will give you real answers and a clear path forward.

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When a top surgeon faces his own health collapse, he’s forced to question everything he’s ever believed about medicine. In this gripping conversation, Dr. Darshan Shah reveals how hitting rock bottom led him to uncover the true keys to longevity — from biomarker mastery and advanced testing to the future of AI-driven health and gene therapy.

This episode will make you rethink what it means to live — and how long you can do it.

Join the most comprehensive female-specific community for health and longevity optimization.

After over a decade dedicated to human performa...