Depends on how much you're eating. They still contain chitin and human stomachs don't like chitin. You can end up with pretty severe stomach discomfort from eat

Depends on how much you're eating. They still contain chitin and human stomachs don't like chitin. You can end up with pretty severe stomach discomfort from eating a lot of them raw. Button and cremini mushrooms are actually the same species, and have pretty low chitin levels, but even someone with a pretty strong stomach can definitely overdo it with raw agaricus bisporus.