So much nutritional studies have been done on animals and yet we know that different animals react totaly different to eg saturated fats and atherosclerosis.
Animals are a garbage proxy for anything human related.
That has a two-way relationship with biological factors, statistically at least, meaning it's not entirely social either.
https://www.psychologytoday.com/ie/blog/old-school-parenting...
[1] The WHO?: https://www.who.int/health-topics/gender
Actually, it's not. It's well known that medications can have different effects or different dosage requirements depending on menstrual cycle.
And if you drop out a drug candidate in animal trials because you don't account for genetic and hormonal gender as well as menstrual cycle, you can end up dropping prematurely.