Vitamin C plays several important roles in horses’ bodies, including supporting the immune system, collagen production, and iron absorption. Vitamin C is also a powerful antioxidant, helping to protect cells from damage.A lack of Vitamin C can lead to several health problems, including poor wound healing, reduced immunity, and joint pain.Sodium ascorbate is a more bioavailable form of Vitamin C, meaning that the body more easily absorbs it. As a result, supplementing with sodium ascorbate can he..