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Dietary SupplementNaturally Contains Amino Acids Trace Minerals and MoreTraditionally Used to Support Sexual HealthScience-Backed Quality Since 1969Oyster extracts have long been popular in Japan and are suddenly catching on around the world. Historically used to support sexual health new evidence suggests more broad-spectrum benefits thanks to oyster's glycogen taurine and other nutrients. Swanson Kyoto Oyster Extract comes direct from Japan where it is harvested from pure waters in protected Pacific oyster beds.