*note: While I state facts in this rant, it is still a rant and my opinion. Not looking to fight with anyone and do not plan on responding any further. I apologize if I say things that some may not agree with, but hey this is my OPINION (with some facts attached), I am not a doctor (not that that would matter anyhow, look how they do nutrition) I only play one with my significant other.
I am pretty sure there were humans in Europe 1.2 million years ago, with the migration starting around 2 million years ago. It takes us humans about 60-70,000 years to genetically evolve completely, so the away from the equator thing for many of us from European genetics, should have been taken care of long ago.
Now the angle in of the sun in the sky and when people are out getting the sunlight is another story. May be deficient due to this, but not from an evolutionary perspective.
Also there are probably genetic defects some folks may carry that just does not allow their bodies to produce the vitamin D as they should.
As I stated in an earlier post, I am a wildland firefighter that works outdoors all summer long in the sun, and I am still Vit. D deficient. (No proof but I think I may have something else going on in the genetic department).
When it comes to Melanoma, the highest risk group of developing it are non-Hispanic whites, who have a lifetime 2.5% chance of developing it.
In 2017 in the United States 1.3 million people are expected to die in automobile accidents while only 9.730 from melanoma. NINE THOUSAND SEVEN HUNDRED AND THIRTY. Only 87,000 people will be diagnosed with some form of melanoma in the United States in 2017.
Look all I am getting at here is FOR ME, and I want to stress FOR ME PERSONALLY I am not worried at all about the time I spend out in the sun, and I fall into the non-hispanic white category,. If I was going to be concerned about melanoma I would be insane to drive to work everyday, or ever take a road trip.
Zinc Oxide and Titanium dioxide sunscreens (mineral) from what I understand pose no real risk, but if you start slathering the chemical based ones all over you there is probably a better chance of the sunscreen harming you than the sun.
Oh and one more thing, working in a profession that sticks me out under the glaring sun for the majority of the year I have only known 2 people who developed any sort of melanoma. Hundreds of co-workers over the last 16 years. Both those cases the "freckles" were removed in the Dr. Office.
To conclude my little melanoma rant... I find it particularly interesting that starting in the early 1970's the rates of melanoma started shooting up. All sorts of bad things started happening in the early 1970's health wise. I attached a nice little picture below.
Ok, I am done with my rant and am not going to talk about sunscreen and melanoma any more. I need to get out side and walk around in the sun for a while in order to plan my drive home from work. That dang drive is the most dangerous thing I am going to do today, and most days.