Typical amounts of SPF 50 sunscreen applied by people -- less than the recommended coverage manufacturers use to determine their SPF rating -- provide only a maximum of 40 percent of the expected protection from the sun's harmful rays, researchers at King’s College in London say.
from WebMD Health https://ift.tt/2mNRsxT
Typical amounts of SPF 50 sunscreen applied by people -- less than the recommended coverage manufacturers use to determine their SPF rating -- provide only a maximum of 40 percent of the expected protection from the sun's harmful rays, researchers at King’s College in London say.
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