Grand Hoof + MSM by Grand Meadows provides 20 mg of biotin and 5,000 mg of MSM in just a single 1 oz pelleted dose. This carefully formulated supplement also offers methionine, zinc, lysine, copper, vitamin B-6 and probiotics- everything a horse needs for healthy, strong hooves. Made with a delicious apple flavoring that horses love, Grand Hoof + MSM at Mary's Tack and Feed may be the perfect 2-in-1 supplement you've been looking for.