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You did the workout, you ate "clean,” and your body still isn't responding the way it used to. So what changed? In this episode, I sit down with Dr. Carla DiGirolamo, a double Board-Certified Obstetrician/Gynecologist and Reproductive Endocrinologist specializing in caring for active and high-performing women, to unpack what's really happening to active women's bodies in mid-life and beyond.

We get into why hypothyroidism can be misdiagnosed because of chronic underfueling, what LEA and RED-S are (and why most doctors have never heard of them), hot takes on microdosing GLP-1s and muscle/bone loss for midlife women, and how HRT, testosterone therapy, and IUDs actually fit together. This isn't a decline — it's a detour, and it comes with a new playbook.

Resources from this episode can be found at: https://www.fuelwitherin.com/podcast/v/episode-33-why-your-workouts-stopped-working-and-what-actually-fixes-it-with-dr-carla-digirolamo

CONNECT WITH Dr. CARLA DIGIROLAMO

Instagram profile | @dr_carla_d

Website | https://www.drcarlad.com

Substack Athletic Aging | https://www.athleticaging.blog

FUEL YOUR PERFORMANCE

Momentous is my go-to for high-quality, science-backed supplements →

Offer: Use code FuelWithErin for 14% off one-time purchase and 35% off first-time subscriptions

Shop here: https://crrnt.app/MOME/1KeXpK4v

LETS CONNECT:

Instagram | @fuel.with.erin

Youtube | @Fuelwitherin

Website | https://fuelwitherin.com

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Disclaimer: The information provided in this podcast and its show notes is for informational and educational purposes only. It is not intended as medical advice or as a substitute for the advice of a physician or other healthcare professional. Using this information does not create a doctor-patient relationship.

Do not use this information to diagnose or treat any health problem or to prescribe any medication or treatment. Always consult with a qualified healthcare professional before making changes to your diet, exercise routine, or medications, or before starting any herbal or nutritional supplements. Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. The use of any information provided is solely at your own risk. This disclaimer also applies to any of the guests on the podcast.

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Peptides are everywhere right now — and the previous Peptides for Women episode with Jennifer Woodward just scratched the surface. In this episode I share the research I went down the rabbit hole to understand the full landscape for myself, and give you all the CliffsNotes.

In this follow-up solo episode, I break down the regulatory shifts and sourcing landscape, the repair peptide family flooding your feed (BPC-157, TB-500, GHK-Cu, KPV) and the marketed stacks built from them, the longevity peptides (MOTS-c, Epitalon, Pinealon, collagen), and a full deep dive on GLP-1s — semaglutide vs. tirzepatide, microdosing, the food-noise effect, and the ongoing muscle-loss debate.

No hype, no fear-mongering — just what the research does and doesn't say, so you can make an informed call for your own body.

FUEL YOUR PERFORMANCE

Momentous is my go-to for high-quality, science-backed supplements →

Offer: Use code FuelWithErin for 14% off one-time purchase and 35% off first-time subscriptions

Shop here: https://crrnt.app/MOME/1KeXpK4v

LETS CONNECT

Instagram | @fuel.with.erin

Youtube | @FindYourFuel

Submit a Story | https://fuelwitherin.com

SOURCES MENTIONED IN THIS EPISODE AVAILABLE HERE

https://www.fuelwitherin.com/podcast/v/episode-32-what-i-learned-going-down-the-peptide-rabbit-hole-so-you-dont-have-to-microdosing-glp1s-bpc157-peptide-stacking-and-the-wild-west-of-sourcing

==========

Disclaimer: The information provided in this podcast and its show notes is for informational and educational purposes only. It is not intended as medical advice or as a substitute for the advice of a physician or other healthcare professional. Using this information does not create a doctor-patient relationship.

Do not use this information to diagnose or treat any health problem or to prescribe any medication or treatment. Always consult with a qualified healthcare professional before making changes to your diet, exercise routine, or medications, or before starting any herbal or nutritional supplements. Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. The use of any information provided is solely at your own risk. This disclaimer also applies to any of the guests on the podcast.

Send us Fan Mail

Peptides are having a moment — GLP-1s, BPC-157, growth hormone secretagogues (GHSs) — but most of what you're hearing skips the part that actually matters: none of it works if your foundations aren't in place.

Jennifer Woodward, a Certified Functional Diagnostic Nutrition Practitioner and Board Certified Functional Wellness Coach, and host of Peptides for Women, joins Erin to break down what peptides actually are, which ones have helped her and the women she works with, and why she requires protein, minerals, strength training, and sleep basics before adding peptides. She also shares which ones are worth your money in midlife — from GLP-1s for metabolic reset to the KLOW Stack for joint and gut repair.

We also get into the research behind peptides, how to avoid sketchy sourcing, and client stories that show peptides can mean very different things depending on where you're starting from. This one is your foundations-first, no-hype guide to peptides.

Resources from this episode can be found at: https://www.fuelwitherin.com/podcast/v/shs22se79tdcxgk9ty6klklahyaewy

CONNECT WITH JENNIFER

Instagram profile | @jenniferwoodwardnutrition

Website| https://jenniferwoodwardnutrition.com

Podcast | Peptides for Women

FUEL YOUR PERFORMANCE

Momentous is my go-to for high-quality, science-backed supplements →

Offer: Use code FuelWithErin for 14% off one-time purchase and 35% off first-time subscriptions

Shop here: https://crrnt.app/MOME/1KeXpK4v

LETS CONNECT:

Instagram | @fuel.with.erin

Youtube | @FindYourFuel

Spotify | Apple Podcasts

Submit a Story | https://fuelwitherin.com

==========

Disclaimer: The information provided in this podcast and its show notes is for informational and educational purposes only. It is not intended as medical advice or as a substitute for the advice of a physician or other healthcare professional. Using this information does not create a doctor-patient relationship.

Do not use this information to diagnose or treat any health problem or to prescribe any medication or treatment. Always consult with a qualified healthcare professional before making changes to your diet, exercise routine, or medications, or before starting any herbal or nutritional supplements. Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. The use of any information provided is solely at your own risk. This disclaimer also applies to any of the guests on the podcast.