Vitamin A is a fat-soluble vitamin that produces pigments in the eye's retina. Your eyes need retinal, a light-absorbing substance that is needed to see in low light levels. Vitamin A supplements also help to promote healthy teeth, healthy skin, skeletal tissue, and mucous membranes. People who suffer from poor vision in low light levels or at night are recommended to take Vitamin A supplements to promote healthy vision. At Simply Nutrition, we stock many types and variations of Vitamin A and offer it in either a capsule form, or a liquid form.