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Joint Support500 mg Per CapsuleStandardizedHerbal SupplementTotal Wellness For Mind Body & HomeUnsurpassed Purity & PotencyScience-Backed Quality Since 1969For an effective choice in joint and muscle comfort choose Swanson White Willow Bark Extract. Throughout history European herbalists have treasured white willow bark for its ability to work with the body's chemistry to facilitate joint and muscle comfort. Our 500 mg capsules are standardized to 15% salicin content.