Gooseberry Body Flex is one of our Top sellers! Made with the proper ratios of ingredients to help your horse become steady and supple. Glucosamine, MSM, Grape Seed Extract, Biotics, Vitamin C. That's not all. Horse owners report more than marked improvement within 24-48 hours of first dose. This is considered a medical grade product. Very versatile - use the smallest dose or if needed increase the dose for maximum benefit.