Sunscreen on its own is not enough to protect the skin from cancer, British researchers warned last night.
A new study says that sunscreen does not offer "complete protection."
Experts said the findings support advice to people in hot countries to use clothes to cover up – and not to rely on creams.
The latest findings, reported in Nature, come from studies on laboratory mice.
This showed how ultra-violet light damaged DNA in the cells that give the skin its pigments, especially in the p53, which would normally protect against this damage.
Researcher Professor Richard Marais, from Manchester University, UK, said:” This work highlights the importance of combining sunscreen with other strategies to protect our skin, including wearing hats and loose fitting clothing, and seeking shade when the sun is at its strongest.
“Ultra-violet light targets the very genes protecting us from its own damaging effects, showing how dangerous this cancer-causing agent is. Very importantly, this study provides proof that sunscreen does not offer complete protection from the damaging effects of ultra-violet light."
Dr Julie Sharp, of Cancer Research UK, added: "We’ve known for some time that sunscreen, when applied properly, can help protect our skin from the harmful effects of the sun’s rays. But people tend to think they’re invincible once they’ve put it on and end up spending longer out in the sun, increasing their overall exposure to UV rays.
“This research adds important evidence showing that sunscreen has a role, but that you shouldn’t just rely on this to protect your skin. It’s essential to get into good sun safety habits, whether at home or abroad, and take care not to burn – sunburn is a clear sign that the DNA in your skin cells has been damaged and, over time, this can lead to skin cancer.
“When the sun is strong, pop on a t-shirt, spend some time in the shade and use a sunscreen with at least SPF15 and good UVA protection.”
Nature 11 June 2014
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