Transparent ZnO: Transparent zinc oxide sunscreens with a concentration of at least 7% provide excellent protection from ultraviolet a and b. Most preparations that are commercially are considered broad spectrum and should be rated with at least spf 30.
Answered 3/1/2014
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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