The amino acids 5-hydroxytryptophan (5-HTP) and l-tryptophan are precursors of serotonin. 5-HTP is generally recommended over l-tryptophan because it crosses the blood-brain barrier at a higher rate, ...

In my world, I am often asked about herbal supplements for sleep. One of the more popular ones I am asked about is 5-HTP. Many people have tried it for emotional issues, and others have tried it for ...