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drdavidanderson Wrote:
-------------------------------------------------------
> Susan,
> A little bit of a quibble here. Almost all of our
> Vitamin D in nature is not dietary in origin, but
> comes from skin exposure to UV light of a specific
> wavelength that is needed to cleave the B ring of
> dihydrotachysterol to pre-Vitamin D3, which is
> then hydroxylated in the liver to the main storage
> form, 25-hydroxycholecalciferol. They did not
> depend on dietary sources because they will I
> presume have had plenty of sunlight exposure at
> least in summer. The active form is 1,25
> dihydroxycholecalciferol, which many tissues
> produce locally, and systemically is produced in
> the kidney under the action of parathyroid
> hormone, which is secreted in response to a fall
> in circulating ionised calcium, and acts on the
> small intestine to promote calcium absorption.
>
> A giant with prognathism has excess growth hormone
> until proved otherwise
> David

Again, agreed.

I can't speak for other geographic areas, but this region isn't known for blue skies and sunshine even in summer. In winter, you can forget about seeing the sun in January and February. We get more rainfall and have more cloudy days than Seattle due to proximity to Lake Erie. Vitamin D production is an issue and I've seen plenty of cases of ricketts in my career.

My point is that they would have suffered nutritional deficiencies, especially in winter.

In the spring, at the end of the day, you should smell like earth. ~ Margaret Atwood

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Subject Views Written By Posted
The Socio-Political Structure of Adena Societies 2631 Jason Jarrell 05-Mar-18 17:37
Re: The Socio-Political Structure of Adena Societies 446 Susan Doris 06-Mar-18 06:01
Re: The Socio-Political Structure of Adena Societies 494 drdavidanderson 06-Mar-18 10:15
Re: The Socio-Political Structure of Adena Societies 485 Susan Doris 06-Mar-18 12:48
Re: The Socio-Political Structure of Adena Societies 444 Aine 07-Mar-18 03:44
Re: The Socio-Political Structure of Adena Societies 453 Jason Jarrell 07-Mar-18 04:12
Re: The Socio-Political Structure of Adena Societies 456 Aine 07-Mar-18 04:36
Re: The Socio-Political Structure of Adena Societies 443 Jason Jarrell 07-Mar-18 05:09
Re: The Socio-Political Structure of Adena Societies 430 Aine 07-Mar-18 13:40
Re: The Socio-Political Structure of Adena Societies 445 Jason Jarrell 07-Mar-18 18:26
Re: The Socio-Political Structure of Adena Societies 432 Aine 07-Mar-18 21:41
Re: The Socio-Political Structure of Adena Societies 483 Jason Jarrell 08-Mar-18 00:18
Re: The Socio-Political Structure of Adena Societies 454 Aine 08-Mar-18 22:52
Re: The Socio-Political Structure of Adena Societies 457 Aine 07-Mar-18 03:46
Re: The Socio-Political Structure of Adena Societies 443 Susan Doris 07-Mar-18 05:59
Re: The Socio-Political Structure of Adena Societies 455 Jason Jarrell 07-Mar-18 07:55
Re: The Socio-Political Structure of Adena Societies 430 Aine 07-Mar-18 13:18
Re: The Socio-Political Structure of Adena Societies 437 Susan Doris 07-Mar-18 14:39
Re: The Socio-Political Structure of Adena Societies 456 SkinwalkerScrooge 09-Mar-18 19:51
Re: The Socio-Political Structure of Adena Societies 438 Susan Doris 10-Mar-18 06:03
Re: The Socio-Political Structure of Adena Societies 453 drdavidanderson 10-Mar-18 07:52
Re: The Socio-Political Structure of Adena Societies 424 Susan Doris 10-Mar-18 08:40
Re: The Socio-Political Structure of Adena Societies 427 SkinwalkerScrooge 10-Mar-18 09:09
Re: The Socio-Political Structure of Adena Societies 443 Aine 10-Mar-18 13:49
Re: The Socio-Political Structure of Adena Societies 426 Jason Jarrell 10-Mar-18 21:04
Re: The Socio-Political Structure of Adena Societies 427 Aine 10-Mar-18 13:31
Re: The Socio-Political Structure of Adena Societies 424 Aine 10-Mar-18 13:16
Re: The Socio-Political Structure of Adena Societies 808 SkinwalkerScrooge 11-Mar-18 05:46


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