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Every lot of NOW® L-Tryptophan is tested to be free of Peak E and microbial contamination. CERTIFICATIONS/CLASSIFICATIONS: Soy Free, Nut Free, Vegan/Vegetarian, Non-GMO, Egg Free, Dairy Free, Made without Gluten.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.