From The Baltimore Sun:
Scientists are unsure whether sunscreen
prevents against melanoma, the deadliest type of skin cancer that accounts for more than 75 percent of skin cancer deaths. They suggest that sunscreen may prevent sunburn, but may fail to protect against cancer. Sunscreens are designed to absorb energy from ultraviolet light, however the energy may be transferred to the DNA in skin cells, which could cause problems.
Some studies have even found a link between melanoma and sunscreen use, though researchers suggest this may only show that people who are easily sunburned, who are more likely to get melanoma, are also more likely to use sunscreen.
Researchers still recommend using sunscreen as it does protect against basal cell carcinoma, the most common skin cancer that is usually easy to treat, and sunburn, and it slows the wrinkling of aging skin.
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