Food & nutrition myths
Food myths spread fast because everyone eats — and because a surprising number of them started as deliberate propaganda or half-understood science. Here's the correction aisle.
Where the myth came from
Myth
The claim: Eating carrots gives you exceptional night vision.
Actually: Carrots support normal eye health (they contain vitamin A precursors), but they won't give you superhuman night vision. The specific claim traces to World War II British propaganda, which credited carrots for RAF pilots' successes to help disguise the fact that radar — not diet — was the real advantage.
Myth
The claim: Turkey makes you sleepy at Thanksgiving because of its tryptophan.
Actually: Turkey contains tryptophan, but no more than chicken and many other meats. The post-meal drowsiness is much better explained by eating a large, carbohydrate-heavy meal — plus alcohol and simply relaxing — than by turkey specifically.
Safety & medicine
Myth
The claim: Spicy food causes stomach ulcers.
Actually: Most ulcers are caused by H. pylori bacterial infection or long-term use of NSAID painkillers — a discovery that won its researchers a Nobel Prize. Spicy food can irritate an existing ulcer, but it doesn't cause one.
Myth
The claim: MSG (monosodium glutamate) is dangerous and causes headaches.
Actually: MSG is classified as generally recognized as safe by food safety regulators, and controlled studies have largely failed to support a broad 'MSG symptom complex' in the general population, though a small number of individuals report personal sensitivity.
Myth
The claim: Freezing food kills any bacteria in it.
Actually: Freezing stops bacteria from multiplying, but it doesn't reliably kill them — food safety guidance treats thawed food as if it can still carry the same bacteria it had before freezing.
Myth
The claim: The 5-second rule makes food dropped on the floor safe to eat.
Actually: Food safety researchers (notably at Rutgers and Clemson) have found that bacteria can transfer to food essentially the moment it touches a surface — timing barely matters compared to how wet the food is and how contaminated the surface is.
Small everyday mix-ups
Myth
The claim: Brown eggs are healthier than white eggs.
Actually: Shell color depends entirely on the breed of hen, not nutritional content. Brown and white eggs from similarly raised hens are nutritionally equivalent.
Myth
The claim: Drinking alcohol warms you up in the cold.
Actually: Alcohol dilates blood vessels near your skin, so you feel warmer — but that same process pulls heat away from your core faster, making alcohol genuinely dangerous in cold-weather situations, not protective.
Myth
The claim: Detox teas and juice cleanses flush toxins out of your body.
Actually: A healthy liver and kidneys already do that job continuously. There's no good evidence that commercial detox products remove toxins any better than your own organs do on their own.
More on the body these foods fuel: body & health myths. And if it's the animal on the plate you're curious about, see animal myths.