Is Keto Bad for Women In Menopause? ep #052

April 29, 2026•6 min read

Summary

Is Keto Bad for Women in Menopause?

There's a question I'm getting almost weekly right now, and it goes something like this: "Leah, I keep hearing keto is amazing for hormones — but I also keep hearing it's bad for women in midlife. What's actually true?"

I get it. The information out there is a mess.

One side will tell you keto is the secret weapon for everything from belly fat to brain fog. The other will tell you it wrecks your cortisol, tanks your thyroid, and is the last thing a woman in menopause should try.

Here's the part nobody seems to say out loud: they're both partially right. And the real answer lives somewhere in the middle.

A quick reset on what keto actually is

Keto isn't really a diet. It's a way of eating that flips your body into a metabolic state your body is already built to enter. When glucose runs low, your liver starts producing ketones — an alternative fuel your cells (especially your brain) can use. That's it. Your body has been doing this long before there was a single keto influencer on the internet.

Whether you stay there for an hour, a day, or weeks at a time is a totally separate question — and that's where the nuance lives.

Why this even matters in midlife

Here's what's quietly happening in perimenopause and menopause: as estrogen declines, your insulin sensitivity drops. Your body stops handling carbs the way it used to. Insulin resistance creeps in, visceral fat starts gathering around the middle, and your brain — which has been running on glucose for decades — starts struggling to use it as efficiently.

Researchers like Dr. Lisa Mosconi have shown that the menopausal brain has a real fuel problem. And ketones happen to be one of the few alternative fuels the brain can run on.

So can occasional keto help women in midlife? Absolutely. Should every woman over 40 be doing strict keto 365 days a year? Almost certainly not.

Where strict keto backfires

The biggest issue I see is stress. Chronic, prolonged keto — especially when paired with under-eating, intense workouts, and a stressed-out life — can elevate cortisol and put more pressure on an already-overworked HPA axis. For some women it can also blunt T3 (the active form of thyroid hormone), affect sleep, and worsen anxiety.

If you're already running on caffeine and willpower, strict keto is going to feel like a punishment. Because it kind of is.

The middle path: metabolic flexibility

The goal in midlife isn't to be rigidly stuck in one fuel system. The goal is metabolic flexibility — the ability for your body to switch between burning glucose and ketones depending on what you've eaten and what you need.

That looks like:

Lower-carb most of the time, with strategic carb refeeds (especially around workouts and your luteal phase if you're still cycling)

Plenty of protein — non-negotiable for protecting muscle in midlife

Real food fats, not seed oils dressed up in keto packaging

Paying attention to your sleep, stress, and energy as feedback

So is keto bad for women in menopause? No. Strict, prolonged, stressed-out keto might be.

This is exactly the kind of question my CGM Metabolic Makeover program is built to answer for your specific body — because the only way to know how YOU respond to carbs versus fats is to actually see your data.

Your body isn't broken — it's just been ignored.

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The information provided during this podcast is for educational purposes only. The speaker may be a licensed medical professional and may present case studies of actual patients or refer to patients' treatment during the program. Please be reminded that the Scope of Practice for Holistic Nutrition Professionals prevents us from diagnosing, preventing, treating, curing, prescribing, managing, or healing disease. Holistic Nutrition Professionals are not licensed in any state and work with clients, not patients.

Chapters

00:00 Introduction to Keto and Carbs

02:35 Understanding Keto: Definitions and Misconceptions

07:41 Keto and Women in Midlife: The Hormonal Shift

12:00 The Case for Keto: Benefits for Midlife Women

18:37 The Downsides of Keto: When It Can Backfire

25:11 Finding Balance: Metabolic Flexibility Over Strict Keto

35:18 Practical Steps to Start: A Framework for Women

40:35 Introduction to the CGM Metabolic Makeover Program

Sources & Research

All scientific claims in this episode have been verified against primary research. Below are direct links to the studies and expert work cited.

Mosconi et al. (2017) — PET imaging study showing reduced glucose metabolism in peri- and postmenopausal women's brains: Weill Cornell summary
Mosconi et al. (2021) — Scientific Reports: "Menopause impacts human brain structure, connectivity, energy metabolism, and amyloid-beta deposition": PubMed
Dr. Lisa Mosconi — The Menopause Brain (2024): Book site
Dr. Ben Bikman — Why We Get Sick — connects insulin resistance to chronic disease including Alzheimer's: Book site
Bikman STEM-Talk interview — long-form discussion of insulin resistance, brain insulin resistance, and ketones: IHMC
Dr. Ralph DeFronzo (2009) — Banting Lecture / "Ominous Octet" — foundational paper on type 2 diabetes pathogenesis: PubMed
De Paoli et al. (2021) — "The Role of Estrogen in Insulin Resistance": ScienceDirect
Jiang et al. (2024) — Menopause Society meta-analysis: hormone therapy reduces insulin resistance in postmenopausal women: Menopause Society
Iacovides et al. (2022) — PLOS One: ketogenic diet significantly lowered T3 vs. high-carb low-fat diet: PLOS One
Tomiyama et al. (2010) — calorie restriction (1200 kcal/day) significantly raised cortisol output in women: PMC
Barrea et al. (2023) — review on VLCKD and HPA axis activation: PMC
Tsushima et al. (2023) — Cleveland Clinic study: 30 PCOS patients all restored regular cycles on keto, 55.6% pregnancy rate: Frontiers in Nutrition
Camajani et al. (2023) — VLCKD/LCKD/ICKD classification framework and postmenopausal use: Current Obesity Reports
Johns Hopkins — historical timeline of the ketogenic diet for epilepsy (1921, Mayo Clinic): Hopkins Medicine