source naturals, l-tryptophan, 500mg, 120 tablets. excellent product. excellent tablet formulation. serves its purpose. i will purchase it again.

I have learned to recognize the life saving benefits of magnesium as an ICU/OPEN HEART/EMERGENCY nurse. Magnesium has become a very important supplement during the killer rhythm, ventricular fibrillation, among the most important are also, eclampsia, headache including migraines