Eating carrots significantly improves night vision in humans.
NOT BSTOTAL BS
MOSTLY BS — Verdict: Mostly False
Verified by Lenz ·
The Short Version
This claim is misleading. Carrots contain beta-carotene, which the body converts to vitamin A — essential for rod cell function in the eye. However, eating carrots only restores night vision in people who are vitamin A deficient; it does not enhance night vision beyond normal levels in well-nourished individuals. The strongest clinical trial cited used carotenoid supplements, not carrots. The popular belief largely traces back to WWII British propaganda designed to conceal radar technology. For most people in developed countries, extra carrots will not meaningfully improve night vision.
Caveats
The claim conflates correcting a vitamin A deficiency (restoring normal vision) with enhancing night vision beyond baseline — these are fundamentally different outcomes.
The most cited clinical trial supporting the claim used carotenoid supplements, not dietary carrots, making it inappropriate to directly attribute those results to eating carrots.
The 'carrots improve night vision' belief originated largely from WWII British propaganda to conceal radar technology, not from robust scientific evidence.