Lead a hectic, on-the-go lifestyle? Why not start taking L-Tryptophan as part of your pre-bed routine? An essential amino acid involved in the production of serotonin and melatonin, L-Tryptophan is suitable for vegetarians and each vegicap from Now Foods is packed with 500mg. Lead a hectic, on-the-go lifestyle? Why not start taking L-Tryptophan as part of your pre-bed routine? An essential amino acid involved in the production of serotonin and melatonin, L-Tryptophan is suitable for vegetarians and each vegicaps from Now Foods is packed with 500mg. An essential amino acid. 500mg of free form L-tryptophan per capsule. Consume pre-bed as part of an active lifestyle. Suitable for vegetarians. 60 vegicaps per pack L-Tryptophan is an essential amino acid that naturally occurs in food. Produced by Now Foods, this product is suitable for vegetarians. Try it out today!