I understand why you think this isn't unreasonable -- I just don't think it's _possible_ for most things (that aren't overt poisons, i.e. smoking, lead, etc). I

I understand why you think this isn't unreasonable -- I just don't think it's _possible_ for most things (that aren't overt poisons, i.e. smoking, lead, etc). If you get skin cancer, you'll always wish you'd done more. There's just too many variables, and the department of health will likely always be too conservative(see below) for some people's take, so then which "experts" do you listen to? The reality of the advice for sun is probably similar to most things -- You need some sun, but not too much. And no one probably knows the answer, and it will probably change as a result of climate change and other factors. My wife is a high risk pregnancy because she’s over 35, but after probing the doctors what we realize is that for some women at some point between the ages of 30 and 45 the risks to your pregnancy may increase some variable amount but you know what is funny, that because these women are more closely monitored, high risk pregnancies may actually have better outcomes than low risk pregnancies! And so there’s this epically long laundry list of things that you’re not supposed to do, with very little specific guidance on the risks you might take on. But if you really want experts. The Skin Cancer Foundation at Skincancer.org suggests a shotglass full of sunscreen over your entire body every day 30 minutes before you go out, even when it's cloudy. Also, that's not enough! For a full sun protection strategy seek the shade whenever possible, wear sun-safe clothing, a wide-brimmed hat and UV-blocking sunglasses: https://www.skincancer.org/skin-cancer-prevention/sun-protection/sunscreen https://www.skincancer.org/skin-cancer-prevention/sun-protec...