To make sunbathing healthy and safe, it is suitable to use beta-carotene. This substance is a provitamin of A vitamin. It helps to protect the organism from free radicals; so it has an effect of a strong antioxidant. It increases the organism immunity, decreases cancer occurrence, and slows skin ageing. Especially the skin cells are protected from skin cancer. Recommended daily doses of beta-carotene are 6 - 15 mg for adults and 3 - 6 mg for children.