Hi Karen, and thank you for picking up on this. You’re right - it does seem a murky subject. Here is the article that I paraphrased from:

https://www.verywellhealth.com/what-to-know-about-progesterone-cream-89503

I don’t know enough about the subject to draw a conclusion, but it sounds as if the publication is unconvinced about soy or yam derived products, if I understand it correctly. I am very glad of your heads-up about the ‘Now’ product. I will check out your herb.com link instead.

I am not an expert either and will take your advice in proceeding with caution.

It would be great if somebody has found a solid and effective product that definitely works that they could recommend. Unfortunately the ‘Smoky Mountain / SM Nutrition branded product seem not to be available* in the UK at least.

* I just checked iherb.com’s UK web site, and they do list it, though it is out of stock. I have asked them to notify me when available. Thank you for the tip!