I've taken 5-HTP and didn't notice the slightest bit of difference. Saying that, none of the non-prescription medications I've ever taken has had any effect, whatsoever. The list is endless. Vitamin suppliments, 5-HTP, Valerian, Kava Kava, Aconite, Omega 3 + 6, Ginko, Selenium, Magnesium, Hops, Milk Thistle, Lavender...etc etc etc..I might as well have poured the money straight down the toilet.
Still, I take Multi-Vitamin and Cod Liver oil suppliments every day. I really don't know why. :?