Do carrots really give you night vision?
The idea that carrots sharpen your night vision was partly a wartime lie.
Carrots contain beta-carotene, which your body turns into vitamin A - and vitamin A is needed to make rhodopsin, the pigment your eyes use to see in dim light. A real deficiency causes night blindness, so carrots can fix that. But if you already eat enough vitamin A, more carrots will not push your night vision past normal. The strong carrot-eyesight link was amplified by British World War II propaganda to hide that pilots found enemy planes using new radar, not vegetables.
Munching a bag of carrots before a night drive on the highway will not help you see the road any better than usual.
Carrots prevent vision loss from vitamin A deficiency, but they do not upgrade healthy eyes into night-vision goggles.
Knowing where a health claim came from helps you separate real nutrition advice from a catchy story someone repeated for decades.
Carrots fix a shortage, they do not grant a superpower.
Learn the idea and practice English at the same time.