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"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
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
You're completely right. Will fix that. --Taw?