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Formulated with OptiMSM® with Glucosamine & ChondroitinPlus Vitamin C & ManganeseSynergistic FormulaSuper Nutrition® Glucosamine Chondroitin & MSM are formulated to support healthy joint mobility and flexibility.* OptiMSM® a form of MSM that has a high standard of purity safety and consistency. MSM delivers sulfur that is readily absorbed by the body supporting optimal nutritional benefit.*iTested Verified