Health Perception Joint Flex Glucosamine Daily 60s Joint Flex Glucosamine Daily 500/400 is an everyday extra strength combination, with the flexibility to increase or decrease the dose. Glucosamine Sulphate 500mg & Chondroitin Sulphate (USP 90% purity 400mg) with Manganese 2mg & Bioflavonoids 53mg. Manganese is a vital mineral, required for normal formation of connective tissue, bone maintenance & cell protection. Bioflavonoids are natural botanical components found in fruits & vegetables & are a source of Hesperidin. Recommended Daily Dose: 1 to 3 tablets daily, as required (adjust dose according to experience)