5-Hydroxytryptophan (5-HTP) is an amino acid that is the middle
step between tryptophan and the important brain chemical serotonin.
Considerable scientific evidence indicates that low serotonin levels
are linked to a number of common conditions including depression,
obesity, fibromyalgia and headaches. 5-HTP boosts serotonin levels
and may offer benefit in conditions linked to low serotonin levels.