L-Tryptophan powder, 1 pound, by Puriva Nutrition Local pickup, or Nationwide delivery We are a brick-and-mortar retailer and sell/ship directly from our store in North Wales, PA. Ingredients Pure L-Tryptophan powder 90 servings per pound (5 grams per serving) Sealed in an economical, no-frills container or bag We never use fillers, binders, flow agents, anti-clumping agents, surfactants, colloids, artificial flavors, artificial colors, or any other additives. L-Tryptophan L-Tryptophan is one of the nine essential amino acids that the body is unable to manufacture, so it must be obtained through the diet. About Us We buy ingredients from manufacturers and sell directly to customers at our retail location. This allows us to offer the lowest prices in the industry. In fact, we guarantee that our prices are lower than every retailer, including Costco, Amazon, Walmart, Vitamin Shoppe, Target, and GNC.* Also, because our products are made on-site and sold directly to consumers, we can use minimal packaging. This allows us to be eco-friendly and keep your price even lower. If you like, hang onto the large jugs you bought at one of the retailers above, and use them to store our powders -- now we're both helping the environment. A certificate of analysis is available upon request. We also offer wholesale pricing for collagen peptides, creatine monohydrate (micronized), pre-workout powder, and dozens of other ingredients. *Costco, Amazon, Walmart, Vitamin Shoppe, Target, and GNC are registered trademarks of their respective holders. www.puriva.com Puriva/Puriva Nutrition is independently owned and operated, and it is not an affiliate of Fitness International, LLC.