The theory seems to be that there is quite a lot of estrogen in the plant burgers (44 mg in the impossible whopper), tho I cannot find a reputable source for th

The theory seems to be that there is quite a lot of estrogen in the plant burgers (44 mg in the impossible whopper), tho I cannot find a reputable source for this using neither Google, bing or duckduckgo. That being said, a lot of vegetarian and (especially) vegan options do contain soy which is suspected of mimicking estrogen in the human body.