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Stress will turn your hair gray

The carpool, the spilled milk, the deadlines. Who doesn’t believe that stress can shock her (or his) locks?

The Truth: “Too much stress does age us inside and out,” says Nancy L. Snyderman, MD, chief medical editor for NBC News and author of Medical Myths That Can Kill You. It ups the number of free radicals, scavenger molecules that attack healthy cells, and increases the spill of stress hormones in your body. So far, though, no scientific evidence proves a bad day turns your locks silver.

Next: Reading in poor light ruins your eyes