Saw a recent study talking about people who smoke cigarette's in the sunshine are less likely to develope cancer than people with little to no sunlight exposure. And no I'm not suggesting any of us smoke ;)
Iron can only bind oxygen when it’s in the ferrous (Fe²⁺) state. If it gets oxidized to ferric (Fe³⁺), that’s methemoglobin — and it can’t carry oxygen at all
Great call. If you have northern latitude maternal heritage and white skin, getting cold exposure in the winter (or anytime) helps your mitochondria make UVC light internally.
Interesting. I prefer to live somewhere that has cold / snowy winters and substantially more sun (year round) that is near or below the 37th parallel. Right now I live in western Washington and it’s abysmal for sun exposure other than June-September. Just not enough.