Equine America Cortaflex Powder. Equine America Cortaflex Powder effectively and economically supports and maintains healthy joints throughout your horse's life. Research suggests that small molecules are more readily absorbed through the cellular walls and so Cortaflex contains the micro sized key active isolates of Chondroitin and Glucosamine to help provide the body with both the building blocks and the stimulus for its own production of Chondroitin and Glucosamine. Cortaflex now is fortified with HA, ASU and silicon for an even greater benefit to joints, especially those exposed to excessive wear and tear. Read more… HA provides the joints with lubrication and the cartilage with the necessary nutrients. 454g - 2 months supply for the average horse at maintenance level. 908g - 4 months supply for the average horse at maintenance level.