[MonikaT]

As for evidence, there's this:FDA Document If you have a look at the safety section, you'll see that it's very safe indeed.

I just finished reading that document. Knowing how much the US FDA is little more than a rubber stamp for the major pharmaceutical companies, and knowing how much the FDA hates dietary supplements, I'm somewhat amazed at the general tone that PM is no big deal. After all, L-Tryptophan was pulled off the market right around the time Prozac and other SSRIs came to market. Why take an expensive prescription pharmaceutical when an inexpensive, over-the-counter substance can do much the same thing?