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Stress SupportFree FormDietary SupplementSupports A Healthy Natural Response To Daily StressSupports Nervous System HealthProvides Antioxidant SupportScience-Backed Quality Since 1969Swanson L-Lysine is an essential amino acid that works to relieve stress in the body. It regulates immune response and helps us manage the stress of day-to-day life. Each capsule delivers 500 mg of L-Lysine to meet the additional demands of high-stress times.