A Answers (1)
Mehmet Oz, MD, Cardiology, answered"Broad-spectrum" sunscreens protect against both ultraviolet A (UVA) and ultraviolet B (UVB) light. According to Food and Drug Administration (FDA) rules announced in 2011, sunscreens labeled "broad spectrum" must pass a standardized test that guarantees the product provides adequate protection from both UVA amd UVB rays. Products that pass the "broad spectrum" test must offer UVA protection that is proportional to the product's UVB protection. The higher the sun protection factor (SPF) of a "broad spectrum" product, the higher the UVA and UVB protection.