Re: history questions: meat, siberian land bridge, horses in the Americas

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Staffan Lindeberg wrote:
> The emergence of rickets during medieval urbanization and its epidemic
> explosion following industrialism may be partially explained first by an
> increased intake of phytate from cereals and later by the disappearence
> of old methods of reducing the phytate content of cereals.

Wasn't it a result of lack of vitamin D (due to indoor life in
factories instead of exposure to sunlight) and lack of calcium (due to
reduction in milk intake by city dwellers)?
Graham Dane

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