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A member asked:
With the exception of chemical sunblocks, is it true that virtually all sunblocks use micronized zinc oxide or micronized titanium dioxide nowadays?
A doctor has provided 1 answer
Yes: Sunblocks by definition contain a structure (metallic) which reflects the sunlight rather that absorb parts of the spectrum like sunscreens. They use micronized zinc oxide and titanium dioxide.
Answered 6/3/2013
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