Jarrow has an excellent product with their 5-HTP. If you test your products with kinesiology (muscle testing) you will find their's is the best. I've checked out many Anti-aging products which work with the hormone balance in the body - Melatonin, Acetyl-L-Carnitine, HGH and now 5-HTP. After one capsule of this product I felt calmer, had no awareness of any problems in my life and couldn't even remember if I did have any problems! That's the effect of increased Serotonin levels. I take it with Phosphatidylserine which provides nutrition for the brain. Fish from the ocean is brain food too, if you can't afford the Phosphatidylserine. Jarrow 5-HTP 50 mg is a "must have" for Anti-aging