Metabolism

Progesterone and Weight Gain: What the Dose-Dependent Data Actually Says

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Progesterone and weight gain infographic showing metabolic benefits and insulin sensitivity data for bio-identical hormones.

If you’ve recently started progesterone therapy—whether for menopause, IVF, perimenopause, or cycle regulation—you might have noticed a shift on the scale and asked yourself: does progesterone cause weight gain? The relationship between progesterone and weight gain is more nuanced than a simple “yes” or “no,” and the answer is highly dose-dependent.

🧠 A note from Carol

I’m a functional medicine practitioner, and I’ve spent years helping women separate hormone fact from hormone fiction. Here’s what surprises most of my new patients: the thing they’ve been blaming for their weight gain (progesterone) is often not the real problem at all. I wrote this article to give you the data — and a fresh perspective.

If something here resonates with your own experience, let’s talk.
👉 Book a 15-minute consult

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5β-Reductase (AKR1D1): Hormone Off-Switch & Digestion Hero

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A middle aged woman in front of a table of healthy fruits and vegetables, off to the right is a illustration of a liver and a diagram explaining how it interacts with five beta reductase

Imagine your hormones as messengers racing through your body, delivering important signals. But what happens when they stick around too long? Enter 5β-reductase, a hardworking liver enzyme that acts like a gentle “off-switch,” calming down hormones like progesterone, testosterone, and cortisol while powering up the bile that helps you digest fats. This unsung hero keeps your hormone levels balanced and your digestion smooth—yet most people have never heard of it.[journals.plos]​

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Breaking the Insulin-Adrenaline Cycle of Hot Flashes

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Menopausal woman experiencing hot flashes

Hot flashes are not simply the price of admission to menopause. They are a dynamic signal of neuroendocrine stress, metabolic inflexibility, and sympathetic overdrive—often amplified by inefficient catecholamine clearance. Emerging evidence from Jerilynn Prior’s work with oral micronized progesterone 300 mg, alongside the arrival of neurokinin-3 (NK3) receptor antagonists like fezolinetant, now allows a more nuanced and mechanistic approach to vasomotor symptoms (VMS) that goes far beyond “give estrogen or not.”​ Oral micronized progesterone for perimenopausal night sweats and hot flushes a Phase III Canada-wide randomized placebo-controlled 4 month trial | Scientific Reports

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Why We Get Sick by Dr. Benjamin Bikman

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In Why We Get Sick, Dr. Benjamin Bikman, a metabolic scientist and professor at Brigham Young University, delivers a persuasive case that insulin resistance drives many modern chronic diseases. Drawing from his research in bioenergetics, Bikman argues that this condition—marked by elevated insulin levels and reduced cellular responsiveness—underlies not only diabetes but also heart disease, … Read more

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