Carrots help you see in the dark
Possibly the most famous myth out there is the idea that eating carrots improves your night vision. As with many of these myths, this has a nugget of truth. Carrots get their color from beta-carotene, which is useful for creating vitamin A, which helps with eyesight. The myth itself stems from World War II, when successful British fighter pilots attributed their success in nighttime dog fights to eating carrots. This was actually to hide from the Germans the fact that the British had devised a fully-functioning radar system. The prospect of night vision has encouraged kids everywhere to eat more carrots, though.