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# Vitamin/Talk

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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?

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Last edited August 16, 2001 9:05 pm (diff)
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