Coffee and exercise 'save skin'

A cup of coffee could help protect your skin from the sun, US scientists say.

A combination of exercise and caffeinated water reduced the skin-damaging effects of ultra-violet radiation in experiments on mice.

The Proceedings of the National Academy of Sciences study found the mice's natural defence against pre-cancerous cells was boosted by up to 400%.

But a UK expert warned that coffee was "definitely not a substitute" for sun protection.

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