It's a stress hormone. You need stress hormones to develop, thrive and survive.

The problem is the excessive and unopposed (by enough progesterone) action of it.

@peatboy2416 this is the study that Peat used to cite:

https://lowtoxinforum.com/attachments/vitamins-in-canned-food-pdf.11124/

The mice from the raw vegetable group degenerated (they can not get nutrients, of course because of the natural plant defense chemicals).

The mice from the cooked canned vegetable group were fine.

@peatboy2416 unfortunately you are completely mislead on this. Vegetables have goitrogens, lectins, phytic acid and tons of other metabolic disruptors, they are extremely unhealthy in raw form.
You can choose to believe otherwise, but that's just complete delusion. Phsychosis.

Very well cooked they are at best a suboptimal famine food, that still can wreck your gut from the fermentable fiber, endotoxin overload.

@LucH humans can not draw sufficient nutrients from raw vegetables. Our digestive system is not equipped for it, not even talking about the metabolic damage from the natural plant toxins. A cow has 4 stomachs to achieve this. This is pretty basic science and well established. Read the article and the cited sources. Stop living your delusions and pulling others into it.

@LucH no, it's mainly about plant toxins and anti-nutrients, which he calls "anti-vitamins", the articl is about that we can't digest raw vegetables, you obviously didn't read it and are spreading misinformation. Our digestive system can't break down raw vegetables to get to the nutrients, Peat has written and talked excessively about this, you would need a specialized system like a rumen of a cow to ferment them.

If you have this article in front of you and still don't understand it means either you're a troll, a liar, or completely brainwashed beyond saving.

@waterbottle no shrinking, yes it went away after a few hours, maybe half a day. Deeper voice, leaner face overnight (reduced puffines), just relaxed and overall feeling well. Beardgrowth was always fast, never noticed it slowing down. Never got shrunken muscles or anything like that, never heard it could happen to be honest.

The amount is just an estimate, slowly building it up.

No. 1: the progesterone for this experiment was dissolved in sesame oil whis is very bad.
https://pmc.ncbi.nlm.nih.gov/articles/instance/5722682/bin/NIHMS908838-supplement-311456_Online.pdf

No. 2: no word about the type of progesterone used. Could be a synthetic version which often act as estrogen not progesterone, Peat has written extensively about this.

Remove or solve the stressor.

@peatboy2416 I would try to stay away from vegetables as much as you can, especially raw, extremely unhealthy and toxic.

http://raypeat.com/articles/articles/vegetables.shtml

Don't listen to anyone. I would recommend to read Rays website articles and then make up your own mind slowly, even he was wrong about things. Experiment, follow your instinct. Don't ever trust any authority that tells you what to do.

Decades ago Peat was wary of the anti testosterone effects of about pea- to beansized amounts of progest-E, but I don't think this applies anymore, in todays super stressed hyperesteogenic world. I noticed large amounts having androgenic effects by lowering the ratio of estrogen to testosterone. Maybe with 150-200mg I was starting to get numbness in the penis for some hours.