Vitamin D is not a true vitamin as in normal circumstances it is produced in sufficient quantities in the body on exposure to sunlight.
"Normal circumstances"? Why is our milk fortified with Vitamin D if most people produce enough? -- Janet Davis
Vitamin D is synthetized by human body, but in quantities that might be not sufficent.
Level of synthesis depends on sun activity, so in winter and in polar areas it's more like a vitamin,
and in summer and in equatorial areas it's less like a vitamin.
That's what I thought. I believe it also depends on how dark your skin is. So why does the fact that some people sometimes produce enough make it "not a true vitamin"? (I'm trying to understand this, rather than just striking it from Vitamin, since I don't consider myself an expert.) -- Janet Davis
I find the bit about "Vitamin X" confusing. Can someone clarify? --
Janet Davis
BNF:
Vitamin X ::= 'Vitamin' <Letter> | 'Vitamin' <Letter><Number>
-- Taw
:-) I still think it's confusing. Not everyone knows about formal grammars. I'll try to think of a better way to say it. -- Janet Davis
Your changes look good, Taw. -- Janet Davis
Given that
- Usage of names 'Vitamin <letter>' and 'Vitamin <letter><number>' is diminishing. Especially vitamins H, M, B1, B2, B3 and B5 are usually called with their proper chemical names.
Would it better to have the Wikilinks on the proper chemical names? (The "old" names could still be redirects, just not link to them here.)
You're completely right. Will fix that. --Taw
what are the symptoms of not getting enough of the proper vitamins? wnat about too much?
I imagine everyone knows about
scurvy, one possible result of not having enough
vitamin C over an extended period of time. A section on those last two questions would be fascinating, I think. --
KQ
What is Niacin ? Is it Nicotinic Acid or Amide of Nicotinic Acid ?
I'm confused. --
Taw
the Oxford American Dictionary has it as "nicotinic acid." --KQ