Cen Vitamin C PowderVitamin 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 in horses, 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.