Science & Health Channel theme day … Sun!
Another month and another theme day for SciHealth. Our theme is Sun. June, summer, fun, sun. Ouch! Sunburns!
Although it’s pouring rain here right now (not much of a chance of a sunburn today), I thought I’d explain how sunblock works.
I found a decent explanation at the Library of Congress and it’s pretty simple. Sunblock contains things that deflect or prevent absorption of UV A (the ones that make vitamin D) and UV B (the burning rays) by our skin. Commonly zinc oxide is one of the main ingredients. Now, there is some question about the over use of sunscreen and that people aren’t getting enough of the good UV rays. Well, while this might be true, a little unprotected sun exposure is good for you, it’s really hard to judge how much is too much (ouch).
Generally, now that summer is here, just slather it on. And drink some milk.
Tags: sunscreen
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