The skin is your horse's largest organ and first line of protection against harmful organisms, UV rays, chemicals, and more. Orchestrated by a rich immune network, skin cells are constantly dividing and growing to maintain this barrier. However, genetic predispositions or an imbalanced immune system can sometimes lead to abnormal cell growth. Grey horses are particularly susceptible, with approximately 80% over the age of 15 developing melanomas. SmartGrey Defense was designed with specialized antioxidants and ingredients to promote a balanced immune response, support cellular health and normal growth, and help fight free radical damage.