Helps maintain flexible supple joints healthy skin coatsuper MSM crystals for dogsFlexible supple joints healthy skin coat vigour immunityMSM is a natural substance present in food and in the human body that provides an organic source of sulphur. Sulphur is needed in virtually all tissues especially those highest in protein such as muscles enzymes red blood cells skin and hair. As a supplement it may help maintain a healthy youthful dog with supple pain-free joints and an excellent skin and coat. Ingredients 100% Methyl Sulphonyl Methane MSM .