Beta-Carotene — Vitamin A Precursor & Antioxidant
Beta-Carotene — Vitamin A Precursor & Antioxidant
What is beta-carotene and how does it differ from vitamin A?
Beta-carotene is a red-orange pigment found abundantly in carrots, sweet potatoes, spinach, and apricots. It is a provitamin A — the body converts it into vitamin A (retinol) as needed. Beta-carotene is also a powerful antioxidant that protects cells from oxidative stress.
Unlike preformed vitamin A (retinol), beta-carotene does not cause overdose because the body self-regulates conversion. As a supplement, beta-carotene is typically taken in doses of 6-15 mg per day, supporting skin health, vision, and the immune system.
Frequently asked questions about beta-carotene
Yes, beta-carotene provides mild internal UV protection by accumulating in the skin and acting as an antioxidant. Studies show that 12-24 mg of beta-carotene per day for 10+ weeks reduces skin sensitivity to sunlight. It does not replace sunscreen but complements external protection from within.
Yes, long-term consumption of very high doses (over 30 mg per day) can cause carotenodermia — a yellowish-orange discoloration of the skin, especially on palms and soles. This is harmless and disappears when the dose is reduced. At normal doses (6-15 mg), beta-carotene gives a healthier skin tone.
Smokers and former smokers should be cautious with beta-carotene supplements. Two large studies (ATBC and CARET) showed that high-dose beta-carotene (20-30 mg per day) increased lung cancer risk in smokers. For smokers, it is safer to obtain beta-carotene from food rather than supplements.