Scientists told how to correctly apply sunscreen for reducing cancer risk

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Most people incorrectly applied a sunscreen and thus increase the risk of skin cancer — melanoma. To such conclusion the group of scientists from king’s College London, reports Science Alert.

The researchers conducted an experiment involving 16 volunteers with fair skin types, who were divided into two groups. On their skin caused the layers of cream with SPF 50+ (strong sun filters) of different thicknesses and then exposed to ultraviolet radiation.

At the end of the experiment, each participant took tissue samples for biopsy and analyzed the degree of DNA damage. It turned out that when applied to a square centimeter of skin of 0.75 milligrams of sunscreen the level of tissue damage was decreased, but only slightly. Those same volunteers applied 2 milligrams per square centimeter of skin, there was virtually no damage.

As explained by the researchers, the lack of application of the cream on the body reduces its effectiveness. In the end, the cream with SPF 40+ can provide protection at the level of SPF 4+.

Melanoma is one of the most malignant tumors with frequent recurrence and dissemination of metastases. One of the leading risk factors is ultraviolet radiation.