Dermatology and Skin Care Updates from Waterhoody

Part 2 of 4: What Does SPF Mean?

Part 2 of 4: What Does SPF Mean?

Part 2 of a 4 part series on sunscreen

SPF stands for sun protective factor and it represents a relative value of how much a sunscreen can increase the time you can be in the sun before your skin starts to burn.  For example if you have light skin and typically it takes 5 minutes before your skin starts to turn pink, an SPF 15 sunscreen theoretically will allow for 5x15 minutes or 75 minutes before you will start to burn. 

See Part 1: How does sunscreen work?

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