Skin cancers are less common in people with darker skin, which contains more reactive melanocytes and melanosomes than lighter skin, but exposure to ultraviolet rays still causes premature aging and can cause skin cancer. Dermatologist Adam Friedman of Montefiore Medical Center says people with darker skin can be at greater risk of late diagnosis and reduced survival rates. Friedman recommends that people with darker skin use a broad-spectrum sunscreen with an SPF of at least 30 and micronized or nanosized zinc oxide or titanium dioxide, which look less chalky on darker skin.

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