You may have read last week that you should start wearing sunscreen at night. This was bad news for me: I’m already a hopeless victim of sunscreen marketing, slathering the stuff in rain or shine, in London fog, at dusk. I just can’t stop, despite mounting evidence that regular sunscreen may be less protective than advertised, and may even help cultivate a Vitamin D deficiency. And then, last week, Yale researchers found that UV rays keep wrecking skin cells up to three hours after the last photon has hit the skin. This implies that in addition to the SPF 45 I use during the day, I should stock my night table with an “ex post facto” overnight sunblock. With ingredients like vitamin E and antioxidants, this hypothetical cream would act like the Plan B of sun protection, undoing damage after it had ostensibly already been done.
While “night-time sunscreen” was an arresting image, though, that product (which is probably more like an aftersun) wouldn’t solve the fundamental problem: how do I get enough sun to be healthy without getting enough sun to give me cancer? What I really want is something that amps up my skin’s natural sun defenses 24-7 from the inside out. Many different ideas are knocking around various labs, and some might be on the market soon. The best ones manipulate melanin, so in addition to letting me ditch the goopy creams, they’d give me the Mediterranean glow I’ve always been so careful to avoid. Continue reading




This is an updated version of a post that originally appeared in January 2012.