Andrew Huberman· PhD
You do not want your estrogen too low or your testosterone too low. So I eat butter in order to ensure that I get sufficient cholesterol. Butter also has some other things that are beneficial, various small fatty acids that are that are interesting in terms of their effects on metabolism, et cetera. You can look those up, benefits of butter. But again, volume is important and you can't overdo it. Costello incidentally loves butter as well. Along the lines of hormones and testosterone, I get a lot of questions about this I think because a lot of online communities are sort of obsessed with testosterone, and I just want to emphasize that, yes, having sufficient levels of testosterone is vitally important for brain function and having sufficient levels of estrogen will allow your brain to actually function. It turns out that estrogen is one of the main ways in which the brain maintains longevity and maintains its ability to think.