Flexi Biotin 5000 guarantees optimum amounts of substances keeping every component of the horse’s hooves in good health. Contains Zinc and Copper, which act in synergy with the Biotin and give the hooves optimal elasticity and solidity. A high concentration of Methyl sulfonyl methane (MSM) allows the Keratin lamellae inside the hooves’ walls to grow correctly and keeps every part of the “foot” flexible. The result is effective and healthy hooves.