Q: My husband insists he has good vision because of all the carrots he is fond of eating. Is there any truth to this?

A: Yes, but probably not in the way he thinks. People truly deficient in Vitamin A or beta-carotene (as found in carrots) can suffer from poor night vision, but this is a real rarity in our community. Beta-carotene supplements were, up to recently, recommended to reduce the risk of age-related macular degeneration. Unfortunately, increased beta-carotene supplement consumption can increase the risk of cancer in smokers. Lutein and Zeaxanthin are related, but safer, supplements.