Vitamin A
Fat-soluble vitamin. Helps remedy rough, dry skin and has been used in the treatment of psoriasis. It has been used as a topical acne treatment. Some people are allergic to it. It has been used to treat aging skin. It can be obtained from fish liver oil, liver, carrots, green and yellow vegetables, eggs, milk, and dairy products, margarine, and yellow fruits. It prevents vitamin C from being oxidized too quickly in the body. Normal dosages are harmless