Found in a variety of fruits and vegetables, Beta-Carotene is famous for giving carrots rich orange color. This provitamin A is part of the Carotenoid family and readily converts to Vitamin A in the system when needed. Beta-Carotene is also an immune system enhancer and antioxidant. Antioxidants help fight cell-damaging free radicals in the body. Free radicals can lead to oxidative stress, which, studies show, contributes to aging.