what type of sunscreens actually block the rays? Which absorb?

Different ingredients do different things. Sunscreens can block or absorb but which ones do which? What ingredients physically block and which absorb?

inorganic sunscreens physically block UV rays – you want to look for the ingredients titanium dioxide or zinc oxide on your sunscreen for this type of protection. inorganic sunscreens are generally considered milder on the skin, but their downside is that they are white so you can get some of that whitening sometimes associated with sunscreen.

organic sunscreens absorb UV rays – these are ingredients like benzophenone-3, octocrylene, octyl methoxycinnamate.

both types work well and most sunscreens on the market today effectively block both UVA and UVB rays – just make sure to apply enough to offer effective protection.

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