Posted By CosmeSurge on Health
An SPF 30 means it takes 30 times to generate mild redness on your skin that is erythema when applying the sunscreen than it would take with no sunscreen coverage. So, when if it takes 10 minutes to develop redness without a sunscreen lotion. It can take 5 hours to build an equal amount of inflammation with an SPF 30 sun protection cream.
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