Andrew Huberman· PhD
Another thing we should mention about PSA is if you do take a 5-alpha reductase inhibitor like finasteride or dutasteride, often these will cut your PSA in half. So if you-- for example, if you have a PSA of 6 and you start finasteride or dutasteride, and then you recheck it in six months and it's 6.5, that is a huge concern, because that's actually doubled.