Mineral / Physical SPF's
The main difference between mineral and chemical sunscreens is that the chemical sunscreen contains UV filtering ingredients that are absorbed by the skin, while a mineral (physical) sunscreen contains inert UV protective ingredients such as zinc oxide, which sit on the skin surface. Because they give physical protection (ie, they are not absorbed) mineral sunscreens can be less sensitising than chemical. Some argue that because a barrier is created between the skin and the sun, they are more effective than chemical filters at blocking UVA and UVB.
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