After two hours, sunscreens that include some zinc oxide can lose effectiveness, become toxic
Sunscreen that includes zinc oxide, a common ingredient, loses much of its effectiveness and becomes toxic after two hours of exposure to ultraviolet radiation, according to scientists.
from Latest Science News -- ScienceDaily https://ift.tt/2YMxqLa
from Latest Science News -- ScienceDaily https://ift.tt/2YMxqLa
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