Evidence supporting the use of: Carrot
For the health condition: Eyesight (poor)

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Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Carrots are widely associated with supporting and improving eyesight, a belief rooted both in tradition and, to a degree, scientific evidence. The scientific basis for this claim lies primarily in the high beta-carotene content of carrots. Beta-carotene is a precursor to vitamin A, an essential nutrient for maintaining healthy vision. Vitamin A is critical for the formation of rhodopsin, a protein in the retina that is necessary for seeing in low-light conditions. A deficiency in vitamin A can lead to night blindness and, in severe cases, complete blindness. Multiple studies confirm that adequate intake of vitamin A prevents these deficiency-related vision problems.

However, while carrots and other beta-carotene-rich foods can help prevent vision impairment due to vitamin A deficiency, there is little evidence to suggest that consuming carrots will improve vision in people who already get sufficient vitamin A from their diets. The notion that eating large amounts of carrots will grant superior eyesight is more myth than fact, popularized during World War II as part of British propaganda. Nevertheless, carrots do play a legitimate role in supporting eye health, especially in populations at risk for vitamin A deficiency. Overall, the evidence is moderate, justifying a score of 3 out of 5.

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