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Nutritional SupplementContents Certified NSFArtificial Dye FreeGluten FreeOptiFlex-G is a glucosamine sulfate supplement designed to promote joint health by supporting healthy movement and cushioning of joints. Formulated by RheumatologistsGlucosamine is a crucial building block for growth and maintenance of healthy cartilage Independently content-certified by NSF® InternationalTake with OptiFlex-C for optimal joint health benefits