A lot of people don't realize it, but melatonin is a hormone. There's a reason you can't go to the CVS and get testosterone and estrogen, right. Because hormones affect the entire system.They affect all three almost 300 different things in your body. So, what you don't want to do is have somebody just willy-nilly grabbing a hormone and starting to pop it without somebody understanding what's going on with them. More importantly, melatonin in particular and the point I wanted to make earlier about depression ...