(Nutramax) Cosequin(R) contains exclusively researched, low molecular weight chondroitin sulfate combined with high purity glucosamine. Cosequin is the only glucosamine/chondroitin sulfate brand proven effective in controlled studies conducted in the United States. Cosequin's ingredients work together to maintain the structure of your horse's joint cartilage while slowing down the enzymes that break down cartilage. Each scoopful contains 1800 mg glucosamine HCI, 600 mg Sodium chondroitin sulfate (5% being mixed glucosaminoglycans) and 16 mg Manganese Ascorbate.