Does a Higher SPF Mean More Protection?

Does a Higher SPF Mean More Protection?

 
It is logical for someone to think that an SPF of 30 is twice as good as an SPF of 15 and so on. But that is not exactly how it works.
 
The increase in higher protection between an SPF 15 and an SPF 45 is only about four percent.
 
This increase in protection does not make up for the increased amount of chemicals that higher sunscreens have. Our Medical Aesthetician recommends that you use a good physical block (titanium dioxide and zinc oxide) which reflects the rays.
 
For example, an SPF 15 sunscreen blocks 93 percent of UVB (ultraviolet B shortwave rays)–the chief cause of skin reddening and sunburn. Meanwhile, an SPF 30 sunscreen blocks nearly 97 percent.
 
But, the advantage of sunscreens above SPF 50, which blocks about 98 percent of UVB rays is questionable.

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