We need sunscreen becuase we’re indoors 8 and months of the year, then run out naked to sunbathe.
If we were outside more and naturally built up a tan it really wouldn’t be that much of an issue for most people.
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Vespair@lemm.ee 1 month ago
Those make sense to me, but I’ll be honest with you, where I struggle is with the idea of sunscreen. How did our ancestors live outside constantly without any sunscreen but if I’m outside for more than 2 hours in the summer without it I come home looking like a burnt lobster?
I’m sure the answer is that I’m ignorant, or the “natural causes” of yesteryear were really just undiagnosed skin cancer or something, but I have to admit it does seem like a real negative adaptation here from the viewpoint of my uneducated mind.
madcaesar@lemmy.world 1 month ago
Vespair@lemm.ee 1 month ago
I mean I definitely see your point, but as I understand it even field workers are encouraged to use sunscreen and farmers and others who spend a lot of time outdoors are at greater risk of long-term damage, not lesser, despite this supposed acclimation.
FundMECFSResearch@lemmy.blahaj.zone 1 month ago
Back in the day it was normal to die of skin cancer at 30. These days, we prefer to avoid it.
Vespair@lemm.ee 1 month ago
Source? This is my point, that I think we lack evidence for that claim.
madcaesar@lemmy.world 1 month ago
It’s all relative. Sunscreen itself has carcinogens. It’s kind of like blood pressure medication. It’s easy and works. But obviously exercising and eating better would be better.
Same with the sun. Gradual exposure and not baking deliberately in the sun would be better, but sunscreen is easier.
At the end of the day we’re extremely well adapted to the sun for the most part, within reason.
Vespair@lemm.ee 1 month ago
I’ll say that I think if the situation was truly as simple and non-nuanced as you describe, I wouldn’t have any reason to be confused or uncertain on the topic.
But as stated, since even those who adhere to best practices seem to be at higher risk with compound exposure, I think your claim of simple acclimation is a little lacking. I think there is truth in what you say, but far from the whole truth and it is what is missing which eludes me as well.
PersnickityPenguin@lemm.ee 1 month ago
Old school sun block was mostly zinc oxide in paste form, so not really cancerous
kireotick@lemmy.world 1 month ago
You have to remember that people generally wore long sleeve clothing and hats. They did not expose much skin to the sun historically
microphone900@lemmy.ml 1 month ago
That’s a great question! We didn’t really need sunscreen in prehistoric time because we adapted to the environments that we lived in and we didn’t migrate to new environments as quickly as we could in later times. Those adaptations are getting more tan more easily and growing thicker skin. We can still see this now in people who don’t use sunscreen and their skin looks tougher and more leathery. Also, there were some ancient sunscreens ranging from simple mud to pastes made from ground plants.
PersnickityPenguin@lemm.ee 1 month ago
People have been making clothing for ~5 million years or so.
absGeekNZ@lemmy.nz 1 month ago
Well there is that protective layer in the atmosphere that we fucked up.
The ozone layer is slowly healing itself, but we still have a long way to go before it is stable again.
Also as others pointed out, we don’t work the fields and spend most of our time outside any more…so the natural protection isn’t building up like it did in the past.
Darthjaffacake@lemmy.world 1 month ago
Maybe people didn’t live long enough for skin cancer to make a difference?
Vespair@lemm.ee 1 month ago
So I’m no expert, so take this with a grain of salt, but it’s my understanding that while average ages were much lower in the past, this number is heavily skewed by infant mortalities and deaths due to preventable disease. As I understand it, the expected age of an otherwise healthy individual was pretty comparable to us today. More people died young, but those who didn’t lived about as long as such. So I don’t think not living long enough for skin cancer to take effect really jives with my understanding of history.
But again, I’m not an expert and the likelihood that I’m just an idiot who is wildly misunderstanding things is, frankly, high.
PersnickityPenguin@lemm.ee 1 month ago
Have you ever seen an Australian rancher? They look like boiled lobsters
Anticorp@lemmy.world 1 month ago
If they lived in areas with a lot of sunshine, they developed dark skin. If they didn’t, they developed light skin. Beyond that if they were light skinned and moved to areas with a lot of sunshine they wore long sleeves even in hot weather, and their face and neck skin turned to leather. They typically didn’t live long enough for skin cancer to be a concern.
Vespair@lemm.ee 1 month ago
As I said in a other comment, I think “they didn’t live long enough” is a bit of misconception. I’ll repeat my comment here rather than writing it out again:
“So I’m no expert, so take this with a grain of salt, but it’s my understanding that while average ages were much lower in the past, this number is heavily skewed by infant mortalities and deaths due to preventable disease. As I understand it, the expected age of an otherwise healthy individual was pretty comparable to us today. More people died young, but those who didn’t lived about as long as us. So I don’t think not living long enough for skin cancer to take effect really jives with my understanding of history.
But again, I’m not an expert and the likelihood that I’m just an idiot who is wildly misunderstanding things is, frankly, high.”
Anticorp@lemmy.world 1 month ago
It’s the “more people died young” part that meant it wasn’t an ever present problem like it is today. We might have had more ozone to protect people too, although that’s just wild conjecture.