carrots are really good for your eyesight

Carrots have long been touted for their efficacy in improving eyesight, and generations of children have been admonished to not leave them on their plates lest they end up needing glasses.

carrots do have a hefty dose of beta-carotene, which your body converts into vitamin A—a molecule that helps with a several of basic eye health. Ever walk into a dark movie theater on a sunny day and notice how your eyes adjust to seeing in the dark after a few minutes? That’s Vitamin A. In the back of your eyes are rod photoreceptors—cells that need the fat-soluble molecule in order to help you see in low light. A bunch of other vegetables do the same thing for you, though, so if you want to avoid bumping into people at the theater or, say, stave off cataracts, you’d better eat up. If you want to go caving, however, you’re better off taking a headlamp than a bundle of carrots.

There is at least a bit of something to the carrots/vision presumption: Beta-carotene, which is found in the vegetable, may help reduce the risk of cataract and macular degeneration. However, it needs be pointed out that studies which have posited this link used doses of Vitamin A or beta-carotene that were higher than what is found in the standard diet. It would be quite difficult to eat the requisite number of carrots to match this level of intake. Also, among those who suffer a Vitamin A deficiency, nyctalopia can be at least somewhat helped by adding carrots to the sufferer’s diet.

Carrots are rich in beta-carotene, a carotenoid pigment which is an essential precursor for vitamin A. Deficiencies in vitamin A are the leading causes of blindness in the developing world.

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