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Thank you for your interesting post.

Susan

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

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Subject Views Written By Posted
The Socio-Political Structure of Adena Societies 2449 Jason Jarrell 05-Mar-18 17:37
Re: The Socio-Political Structure of Adena Societies 420 Susan Doris 06-Mar-18 06:01
Re: The Socio-Political Structure of Adena Societies 448 drdavidanderson 06-Mar-18 10:15
Re: The Socio-Political Structure of Adena Societies 459 Susan Doris 06-Mar-18 12:48
Re: The Socio-Political Structure of Adena Societies 413 Aine 07-Mar-18 03:44
Re: The Socio-Political Structure of Adena Societies 420 Jason Jarrell 07-Mar-18 04:12
Re: The Socio-Political Structure of Adena Societies 428 Aine 07-Mar-18 04:36
Re: The Socio-Political Structure of Adena Societies 413 Jason Jarrell 07-Mar-18 05:09
Re: The Socio-Political Structure of Adena Societies 402 Aine 07-Mar-18 13:40
Re: The Socio-Political Structure of Adena Societies 413 Jason Jarrell 07-Mar-18 18:26
Re: The Socio-Political Structure of Adena Societies 406 Aine 07-Mar-18 21:41
Re: The Socio-Political Structure of Adena Societies 458 Jason Jarrell 08-Mar-18 00:18
Re: The Socio-Political Structure of Adena Societies 428 Aine 08-Mar-18 22:52
Re: The Socio-Political Structure of Adena Societies 429 Aine 07-Mar-18 03:46
Re: The Socio-Political Structure of Adena Societies 414 Susan Doris 07-Mar-18 05:59
Re: The Socio-Political Structure of Adena Societies 425 Jason Jarrell 07-Mar-18 07:55
Re: The Socio-Political Structure of Adena Societies 400 Aine 07-Mar-18 13:18
Re: The Socio-Political Structure of Adena Societies 407 Susan Doris 07-Mar-18 14:39
Re: The Socio-Political Structure of Adena Societies 428 SkinwalkerScrooge 09-Mar-18 19:51
Re: The Socio-Political Structure of Adena Societies 407 Susan Doris 10-Mar-18 06:03
Re: The Socio-Political Structure of Adena Societies 406 drdavidanderson 10-Mar-18 07:52
Re: The Socio-Political Structure of Adena Societies 396 Susan Doris 10-Mar-18 08:40
Re: The Socio-Political Structure of Adena Societies 398 SkinwalkerScrooge 10-Mar-18 09:09
Re: The Socio-Political Structure of Adena Societies 409 Aine 10-Mar-18 13:49
Re: The Socio-Political Structure of Adena Societies 397 Jason Jarrell 10-Mar-18 21:04
Re: The Socio-Political Structure of Adena Societies 396 Aine 10-Mar-18 13:31
Re: The Socio-Political Structure of Adena Societies 393 Aine 10-Mar-18 13:16
Re: The Socio-Political Structure of Adena Societies 735 SkinwalkerScrooge 11-Mar-18 05:46


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