Horse Health > Horse Supplements MEGA GRAND FLEX 20LB Price $509.78 Stock status: Out of Stock Stock status: In Stock Product Code: RJ392-42 Qty: Description Sizing Information Reviews MEGA GRAND FLEX 20LB, Mega Grand Flex - for joint health in horses and dogs. Unique powdered joint supplement provides more aggressive short-term joint support for horses and dogs. Designed to help animals that have not responded to traditional levels in joint support products. Delivers additional glucosamine and added MSM per dose as compared to original Grand Flex. Each 1 oz dose contains 12,500 mg glucosamine HCl, 10,000 mg MSM, 1,000 mg vitamin C, 1,000 mg methionine, 250 mg manganese gluconate, 200 mg zinc gluconate, 200 mg lysine, 150 mg niacinamide, 100 mg yucca, 100 mg citrus bioflavonoids, 80 mg proline and 50 mg copper gluconate. Dosage: Horses - 1 oz daily; Dogs (50 lbs) - 1/2 tsp daily. For long-term maintenance and joint support, follow up with original Grand Flex, Grand HA or Grand HA Synergy. 3.75 lbs = 60 doses.