Bioidentical Wild Yam Progesterone Cream vs. Synthetic Progestins: What’s the Difference?

Progesterone” and “progestin” get used interchangeably all the time — but they’re not the same thing, and the difference matters if you’re trying to choose a hormone support option that’s right for you.

## The Core Difference

**Bioidentical progesterone** is molecularly identical to the progesterone your own body produces. It’s typically derived from plant sources like wild yam or soy, then processed into a form your body can use — but structurally, it’s the same molecule.

Synthetic progestins

(like medroxyprogesterone acetate) are lab-created compounds designed to mimic some of progesterone’s effects. They bind to progesterone receptors and can produce similar results in some respects, but their chemical structure is different — and that structural difference means they don’t always behave the same way in the body.

More than 200 synthetic progestins have been developed over the decades, each with a slightly different structure and side-effect profile — which is part of why some women tolerate one type of hormonal birth control or hormone therapy very differently than another.

## Why the Distinction Matters

The confusion between progesterone and progestins isn’t just semantic — it’s shaped decades of public understanding around hormone therapy. Much of the concern the public has around hormone replacement therapy actually traces back to studies on synthetic progestins combined with synthetic estrogen, not bioidentical progesterone on its own. Because these terms are so often conflated in media coverage, many women assume “hormones are hormones” without realizing there’s a structural distinction worth understanding.

That said, this is genuinely an active area of ongoing research, and any decision about hormone therapy — bioidentical or synthetic — is one to make with a healthcare provider who knows your personal health history.

How Wild Yam Fits In

Wild yam (Dioscorea villosa) contains a plant compound called diosgenin, which can be laboratory-converted into bioidentical progesterone. This is the basis for most topical wild yam progesterone creams on the market — the cream itself doesn’t convert to progesterone in your body (a common misconception), but the progesterone in a well-formulated wild yam cream is derived from that plant source and is bioidentical in structure.

This transdermal approach —

applying bioidentical progesterone through the skin — was pioneered clinically in the 1970s and 80s by Dr. John R. Lee, M.D., whose research and advocacy helped popularize progesterone cream as an option for menopausal and perimenopausal women.

## What to Look For in a Cream

Not all “progesterone creams” are created equal.

Wise Essentials has formulated several products based of natural, plant-based ingredients since 1995. Founder Melinda Bonk was mentored by Dr. John R. Lee, M.D., on women’s hormones for healthy perimenopause and menopause.

His education is the foundation that has shaped the Wise Essentials brand’s approach for over three decades. Throughout the decades, the distribution was through health food stores and natural healthcare professionals.

This article is for educational purposes and isn’t a substitute for individualized medical advice. Talk with your healthcare provider about which hormone support options, if any, are right for you.