[AntiImperialist]

Again, nutrition science is very misleading.

Sunlight doesn't have vitamins. What supposedly happens is that when you get exposed to sunlight, some of the cholesterol in your blood gets converted to Vitamin D. What part of sunlight, you might wonder. Is it the visible spectrum? No, it's infrared, you know the thing that you get from your radiator.

So, two factors determine how much vitamin D you're going to get:

- cholesterol levels in your blood

- how much heat you're exposed to (i.e. how warm your room is)

I'm sure we need sunlight for other things... like our sleep cycles or whatever... but we definitely don't need it for vitamin D.

[shajznnckfke]

Another commenter pointed out the factual error about vitamin D coming from IR vs. UV, but there’s another misconception in this post.

The amount of IR you get exposed to is not the same thing as how warm your room is. If you touch a hot pan, or get hot because you’re hanging out where the air temperature is high, that heat isn’t being transferred to you by IR. It’s being transferred by thermal conduction: https://en.m.wikipedia.org/wiki/Thermal_conduction

So even if vitamin D was created by IR, you wouldn’t get any from sitting in a hot room.

[Jenda_]

No, it's ultraviolet. The opposite side.