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Immune HealthPharmaceutical GradeDietary SupplementSourced From Japan-Based Company AjinomotoEssential Amino Acid That Supports the Immune System and Helps the Body Fight StressScience-Backed Quality Since 1969Ajipure® Amino AcidsSwanson AjiPure L-Lysine is an essential amino that supports the immune system and helps the body during stressful times. Produced through fermentation using raw ingredients of non-animal origin AjiPure amino acids are 99–100% pure. Impurities in other brands can be six times higher!