When it comes to sunscreens, most consumers are concerned about SPF, brand and price. Typically, they do not turn the bottles around to check out what, exactly, they are slathering on their skin, maybe because they'd be confronted with words such as avobenzone, oxybenzone, octisalate, diethylexyl, triethanolamine and a host of other ingredients unpronounceable to anyone who works outside a lab.

It's easy to see why some consumers are turning to niche manufacturers' so-called natural sunscreens, whose ingredient lists sound far more comforting, stocked, as they are, with organic macadamia nut or hemp seed oils, green tea extracts, beeswax, purified water and other wholesome fare.

But do they work?
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