I looked for tryptophan or l-tryptophan at the store today. all they had were teh gelatin caps, and I think I'm allergic to gelatin. I did find something with valerian and kava kava. Kava kava will really make you tranquil. It really makes you high, though I haven't tried to get to the bottom of complaints about it. The caps I got also contain GABA and passion flower. Passion flower also is a sleep aid. I have it growing in my yard. I'll try making a tea from it.