I've tried 5-HTP. In fact, I still have the bottle... only took around a week's worth. My younger brother recommended them to me. They have a horrible effect on me... I shake, feel weird in my head and can't stomach it. The weird feeling in my head is what I couldn't deal with... it was like little jolts of electicity (best I can describe the sensation).
Brand: Nature's Bounty
50mg
1 capsule per day.
Ingredients:
niacin
vit. B6
magnesium
5-HTP
valerian root

It could be, I just didn't let them get into my system.