Equine Products Ireland Strong Bone +. Strong Bone + is a revolutionary new supplement that is multifunctional. It is designed to support strong healthy bones and to significantly aid joint function in performance. Therefore, providing significant benefits to horse owners, trainers and riders worldwide. Composition Toasted Soya Beans, Di-Calcium Phosphate, Methyl Sulphonyl Methane, Calcium Carbonate, Magnesium Oxide, Hyaluronic Acid.