Author of the Month :  The Official GrahamHancock.com forums
Join us at this forum every month for a discussion with famous popular authors from around the world. 
Welcome! Log InRegister
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

Options: ReplyQuote


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 438 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 428 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


Sorry, only registered users may post in this forum.