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Lay Summary Carotenoid-based skin color influences attractiveness in human males, but may not signal health. Carotenoid-based coloration is argued to signal health because carotenoids also function as antioxidants. We tested the effect of dietary supplementation of the carotenoid beta-carotene on facial appearance and health in men. Beta-carotene increased skin yellowness and redness to increase attractiveness but did not affect 3 measures of health: oxidative stress, innate immunity, or semen quality.

The carotenoid beta-carotene enhances facial color, attractiveness and perceived health, but not actual health, in humans