In case, like us, you didn't know this vital fact already. Plus more suncream and health facts at Redonline.co.uk
We've always prided ourselves on being a intelligent humans, we can hold down jobs while simultaneously running household and keeping track of our finances. Yet, up until today we didn't know what the SPF number of sunscreen actually meant. Do you?
Obviously we know SPF stands for 'sun protection factor', but we thought the 15, 30, 50 and so on were just a random numerical scale much like tennis scoring, the greater the number only generally indicating a heavier level of coverage. But it turns out we were completely wrong. There is a rational reason why the SPF numbers are what they are: they indicate how many multiples of time you're safe to be out in the sun before you burn.If it takes 20 minutes for your unprotected skin to start turning red, using an SPF 15 sunscreen theoretically prevents reddening 15 times longer — about five hours.
And it makes total sense. SPF 15 will give you 15 times the number of minutes before you burn that you'd have withat all. We know people overuse this phrase in the world of online journalism but really, it feels relevant for us now: mind=blown. If you're looking pretty smug right now and have in fact known this your whole life, then apologies, but our guess is a lot of people will be as shocked by this as us. Now pass us the factor 50!Advertisement - Continue Reading Below
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