GlycoFlex® 3 Bite-Sized Chews provide extra strength joint support. VetriScience® Laboratories’ GlycoFlex 3 Bite-Sized Chews represent the third stage in their comprehensive life stages joint support program for dogs, and is recommended for dogs in need of maximum joint support. It is also recommended by veterinarians for geriatric and working dogs. This formula contains higher levels of glucosamine, MSM, manganese, and DMG, and includes grape seed extract and L-glutathione for added support. GlycoFlex 3 is designed to support joint comfort, flexibility, and mobility.