VetriScience Laboratories GlycoFlex Sport, Hip and Joint Supplement for Dogs, 60 Bite-Sized Chews GlycoFlex Sport supports the joint health needs of dogs that are active on a daily basis. GlycoFlex Sport provides joint supporting nutrients in a delicious chicken liver flavored chew. Active ingredients include 750 mg- Glucosamine, 600 mg- Perna canaliculus, 500 mg- MSM (Methylsulfonylmethane), 100 mg- DMG, 10 mg- Manganese Formulated to support the joints as well as provide optimized oxygen utilization, focus and stamina. VetriScience products are manufactured in the U.S.A. and are backed by a 100% Satisfaction Guarantee.