Vitamin D, Parathyroid Hormone, and Bone Mass in Adolescents1-4

The Journal of Nutrition;  November 1, 2005 ;     700+ words ......related to serum vitamin D in adolescents. Prevalence of serum 25(OH)D deficiency in adolescents...production of 25(OH)D in the liver is dependent on vitamin D obtained from the...The definition for vitamin D deficiency based on serum 25(OH)D varies between...

Vitamin D and African Americans

The Journal of Nutrition;  April 1, 2006 ;     700+ words ......the inclusion of vitamin D from supplements. Despite their low 25(OH)D levels, blacks...the liver to 25(OH)D, the primary storage form of the vitamin and the best clinical indicator of vitamin D status. Optimal blood levels of 25(OH)D with respect to...

The Bioavailability of Vitamin D from Fortified Cheeses and Supplements Is...

The Journal of Nutrition;  July 1, 2008 ;     700+ words ......the comparison of vitamin D bioavailability...25-hydroxyvitarnm D [25(OH)D] response, between...P = 0.046). In the vitamin D-treated groups, the mean increases in 25(OH)D over 8 wk were...25-hydroxyvitamin D [25(OH)D),8 the accepted clinical measure of vitamin D status, are ...

Vitamin D deficiency in the southern United States.

Southern Medical Journal;  April 1, 2007 ;     700+ words ......25-hydroxyvitamin D (25(OH)D), the major circulating form of vitamin D with a half-life...position to create 1,25(OH)[.sub.2]D, the active...The major role of vitamin D is to maintain adequate...should have their vitamin D status determined by measuring a 25(OH)D level. There is...

Vitamin D Insufficiency in North America1

The Journal of Nutrition;  February 1, 2005 ;     700+ words ......clinical assays for 25(OH)D has made possible the assessment of vitamin D nutrition in a number...the use of serum 25(OH)D to define vitamin D deficiency is the...one uses the serum 25(OH)D to define an individual's vitamin D status, it is generally...

Vitamin D in the spotlight

International News on Fats, Oils and Related Materials : INFORM;  March 1, 2008 ;     700+ words ......source, food or sunlight, vitamin D^sub 2^ or D^sub 3^ is converted...form, 25-hydroxyvitamin D (25(OH)D). While this is not the active form of vitamin D, it is the form used as the clinical indicator of vitamin D status. After traveling to the kidney, circulating vitamin D is converted to ...

Top 10 Myths About Vitamin D

Dynamic Chiropractic;  August 12, 2008 ;     700+ words ......People taking only the RDA of vitamin D will lower their 25(OH) D3 levels. The RDA is too...75-200 reference range of 25(OH)D3. Myth 10: Vitamin D should be avoided in pregnancy...vitamin D supplementation. Vitamin D, not 25(OH)D3, crosses into the breast...

The Influence of Vitamin D on Bone Health Across the Life Cycle1-3

The Journal of Nutrition;  November 1, 2005 ;     700+ words ......factors related to vitamin D status in adolescents. Serum 25(OH)D levels in adolescents...past has been a 25(OH)D level below 10 ng...as the marker for vitamin D deficiency, the...when related to 25(OH)D levels. She concluded...research relating to vitamin D nutrition in bone...

Vitamin D Intake: A Global Perspective of Current Status1

The Journal of Nutrition;  February 1, 2005 ;     700+ words ......over the source of vitamin D Adequate circulating...25-hydroxyvitamin D [25(OH)D]^sup 3^ concentrations...the circulating 25(OH)D originates from cholecalciferol or vitamin D-3, which is synthesized...homeostasis. Adequacy of vitamin D nutritional status...circulating levels of ...

Overview of the Proceedings from Experimental Biology 2004 Symposium:...

The Journal of Nutrition;  February 1, 2005 ;     700+ words ......dietary sources to supply vitamin D, the immediate precursor to 25(OH)D (10). In the presence...major static indicator of vitamin D status. Using 25(OH)D response to diet in...the active metabolite of vitamin D; while 1,25(OH)^sub 2^D remains the active...

Calculated Ultraviolet Exposure Levels for a Healthy Vitamin D Status

Photochemistry and Photobiology;  November 1, 2006 ;     700+ words ......The active form of vitamin D is 1,25-dihydroxyvitamin D (1,25(OH)^sub 2^D), which is produced after vitamin D3 has formed in...plasma volume of 25(OH)D that is the usual measure of vitamin D status. 25(OH)D is observed to...hard to explain how vitamin D could protect ...

The clinical importance of vitamin D (cholecalciferol): a paradigm shift...

Original Internist;  March 1, 2007 ;     700+ words ......assessment of serum 25-OH-vitamin D (25(OH)D) and serum calcium...interpretation of serum 25(OH)D laboratory values. Basic Physiology of Vitamin D Vitamin D is obtained...D (calcidiol, 25(OH)D) by the enzyme vitamin D-25-hydroxylase. 25(OH)D then circulates...

The physiology of vitamin D : Current concepts

Indian Journal of Medical Research;  March 1, 2008 ;     700+ words ......complex actions of the vitamin D hormone 1, 25 (OH)^sub 2^ D which is...indicates both 1, 25 (OH)^sub 2^ D^sub 3...depended action of vitamin D receptor (VDR...Liver, kidney and vitamin D Hydroxylation of...dehydrocholesterol to 25(OH) D^sub 3^ in the...

Questions and answers on vitamin D: from the vitamin D newsletter, April...

Townsend Letter;  July 1, 2008 ;     700+ words ......either. The amount of vitamin D you are taking and your 25(OH)D levels indicate...advise you get you 25(OH)D down to less than...immediately stopping all vitamin D and staying out...blood calcium, the vitamin D would help that. Without 25(OH)D levels, there is...

Vitamin D-3 receptor as a target for breast cancer prevention1,2

The Journal of Nutrition;  July 1, 2003 ;     700+ words ......25-dihydroxycholecalciferol [1,25(OH)^sub 2^-D^sub 3...biologically active form of vitamin D-3. The cellular...homeostasis, the vitamin D-3 receptor (VDR...25-dihydroxycholecalciferol [1,25(OH)^sub 2^-D^sub 3...nongenomic effects of vitamin D. Nutritional aspects of vitamin D. The ...