Body & HealthFact
Carrots for night vision were wartime propaganda.
During the Second World War, British officials spread the myth that carrots explained their pilots' night-time success. The real reason was newly introduced radar. Beta-carotene does not improve night vision – except in genuine vitamin A deficiency, which does impair sight.
Useful: When a nutrition rule comes with a great story, ask who told it first.
Source: en.wikipedia.org