Getting the most out of your SPF
Chemical and physical sunscreens offer benefits when mixed with vitamin C. Lortscher suggests a SPF of at least 30 for both types of sunscreens. Additionally, Wesley says that it's most important to look for a sunscreen that is broad spectrum (effective against UVA and UVB rays).
Doyle, Gaul and Gmyrek prefer physical sunscreens over chemical options. "Both are protective if over SPF 30 and broad spectrum but physical sunscreens containing titanium dioxide or zinc oxide truly prevent the sun's rays from reaching the skin," says Gmyrek. "They provide a physical barrier which blocks the rays from reaching the surface."
Gaul adds that physical sunscreens have much broader, longer-lasting protection against the whole range of UV light.
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