Ultralight universe

[S.A.M.]

So if one only lived in a windowless cell with no yard time, for instance. One would inevitably get rickets without supplementing dietry vitD with pill form vitD?

You could also get it if you don't get enough oral supplementation, sit indoors during the day and use a lot of sunscreen when you go out. Why do you think people are so fair at higher latitudes? They need all the exposure they can get.

 

[GhostofMaxwell.]

Why do you think people are so fair at higher latitudes?

I would think lighter skin colour means they absorb less solar radiation across the black-body.

 

[draqon]

I would think lighter skin colour means they absorb less solar radiation across the black-body.

it also has to do with sexual selection.

 

[S.A.M.]

I would think lighter skin colour means they absorb less solar radiation across the black-body.

Lighter skin means less melanin, which blocks UV rays (also a reason why dark skinned people are less susceptible to melanoma)

 

[GhostofMaxwell.]

Lighter skin means less melanin, which blocks UV rays (also a reason why dark skinned people are less susceptible to melanoma)

Actually melanin absorbs UV radiation. Learn to look up the right copy and pasting sources!

 

[S.A.M.]

Actually melanin absorbs UV radiation. Learn to look up the right copy and pasting sources!

I mean from interacting with 7 dehydrocholesterol, or in the case of melanoma, blocks the mutations caused in nuclear DNA by uv radiation.

 

[GhostofMaxwell.]

7 dehydrocholesterol

When did you make that word up?

 

[S.A.M.]

When did you make that word up?

O brother.

from wiki

7-Dehydrocholesterol is a zoosterol that functions in the serum as a cholesterol precursor, and is converted to pre-vitamin D3 in the skin, therefore functioning as provitamin-D3. The presence of this compound in human skin enables humans to manufacture vitamin D3 from ultra-violet rays in the sun light, via an intermediate isomer pre-vitamin D3. It is also found in the milk of several mammalian species.[1] It was discovered by Nobel-laureate organic chemist Adolf Windaus.

 

[GhostofMaxwell.]

Wikipedia is an unriliable source, no scientist use it for their research.

 

[S.A.M.]

Wikipedia is an unriliable source, no scientist use it for their research.

Ya I only use it for dummies;for real scientists I use Pubmed.

 

[GhostofMaxwell.]

Ya I only use it for dummies;for real scientists I use Pubmed.

Go to university and do us a favour.

 

[S.A.M.]

Go to university and do us a favour.

Sad, all that rationality, just wasting away from disuse.

 

[Oli]

Go to university and do us a favour.

Ooops!