GLYCOFLEX Stage 2 CHEWABLE 120 TABLETS for Hip and Joint Health Contains Perna canaliculus, Glucosamine HCl, Dimethylglycine, Methylsulfonylmethane, and manganese GlycoFlex joint health supplements have been trusted and recommended by veterinarians for over 30 years. VetriScience products are veterinarian formulated and approved by our veterinary review board. Our supplements are made in the USA. Provides added comfort during recovery. Support for joints and connective tissue health. Veterinarian approved GlycoFlex 2 is a great option for preventative measures for competitive and working dogs as well as those that may be pre-disposed to degenerative joint health issues. GlycoFlex 2 is recommended for dogs showing discomfort due to aging, joint disease, hip dysplasia or recovering from orthopedic surgery.