I got a question in a recent Q&A call about wild yam (Dioscorea villosa) cream and progesterone. A client felt the cream was helping raise their progesterone, but the practitioner had questions about whether that was realistically happening. So what's the deal? I share a few thoughts on why a client might be noticing a difference and things to be on the lookout for as an herbalist or nutritionist if your client is using wild yam cream.
Wild yam (Dioscorea villosa) contains diosgenin, which can be converted to progesterone in a laboratory setting, but the human body does not have the enzymes to make that conversion.
If a wild yam cream seems to be helping with progesterone-related symptoms, the cream may actually contain progesterone (check the active ingredient label - some do).
Lower-quality or less transparent products can sometimes contain undisclosed ingredients or contaminants, including hormones, so it's worth investigating the brand and looking for third-party testing.
The placebo effect is a thing and may be at play here.
Wild yam does contain phytoestrogens, and while topical absorption levels are unclear, this is a more physiologically plausible mechanism than progesterone conversion.
Progesterone blood levels are pulsatile (they fluctuate roughly every 45-60 minutes), so a single lab draw in the luteal phase should not be interpreted as evidence of "low progesterone" without proper clinical context.
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Camille Freeman, DCN, RH, is the founder of Bloom and Grow, offering continuing education and community resources for herbalists and nutritionists in clinical practice. She has been in practice since 2003 with a focus on fertility, pregnancy, and menstrual health.
