Blue Lizard Blog — SPF

What's in a Number? What SPF Really Means

Aug 31 2015 SPF sun safety Sunscreen

  When it comes to sunscreen, it is logical for someone to think that an SPF of 50 or 75is better than an SPF of 15 and so on. But that is not exactly how it works. Most dermatologists and other physicians will tell you, if you are using anything above an SPF 30, you are just adding more unnecessary chemicals to your (or your children’s) skin and wasting money as higher SPF sunscreens are usually more expensive. SPF refers to the ability of a sunscreen to protect against ultraviolet B (UVB) rays that cause sunburns, but not UVA rays,...

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