Talk:Mushrooms/@comment-96.228.47.241-20150203110226/@comment-26075549-20150205120634

You ate it raw. This will result in this huge sanity loss and they are meant to be consumed when you want to get insane (e.g. for passing obelisks or farming beardlings).

You have to cook it over fire and eating the result gives you back 15 sanity at the cost of 1 health which is a great deal in some situations.