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Study: Optimal vitamin D-3 requirement probably much higher than RDA.
2004 OCT 7 - (NewsRx.com & NewsRx.net) -- University of Toronto researchers argue that the optimal vitamin D-3 requirement probably is much higher than the current recommended daily allowance.
"The physiologic range for circulating 25-hydroxyvitamin D3 [25(OH)D; the measure of vitamin D nutrient status] concentration in humans and other primates extends to beyond 200 nmol/L (>80 ng/mL). This biologic 'normal' value is greater than current population norms for 25(OH)D. Concentrations of 25(OH)D that correlate with desirable effects extend to at least 70 nmol/L, with no obvious threshold," stated R. Vieth and colleagues.
"Randomized clinical trials using 20 mcg (800 IU) per day of vitamin D show that this suppresses parathyroid hormone, preserves bone mineral density, prevents fractures, lowers blood pressure, and improves balance," the study authors said.
"Calcium absorption from diet correlates with 25(OH)D in the normal range. Health effects of vitamin D beyond osteoporosis are mostly supported by the circumstantial evidence of epidemiologic studies and laboratory research. These include prevention of cancer and the autoimmune diseases, insulin-dependent diabetes, and multiple sclerosis," Vieth and colleagues wrote.
"One mcg per day of vitamin D-3 (cholecalciferol) increases ...
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- Magazine article from: Modern Brewery Age February 14, 2005 700+ words
A recent article in the Journal of Thrombosis and Haemostasis determined that drinkers of wine benefit from its cardioprotective effects, more so than those who drink beer or other spirits, and wine drinkers may also live longer. The article is part of a series of papers published in an open forum
- Reports on life sciences findings from University of Illinois, Department of...
- Magazine article from: Women's Health Weekly October 8, 2009 700+ words
...of the relationship. 25(OH)D levels are determined by...negative association between 25(OH)D and PTH is similar between...article was prepared by Women's Health Weekly editors from staff and other...Copyright 2009, Women's Health Weekly via NewsRx.com.
- Studies from McGill University in the area of bone research described.
- Magazine article from: Women's Health Weekly October 16, 2008 700+ words
"PTH and 1,25(OH)(2)D each exert dual...in endogenous 1,25(OH)(2)D may therefore...was prepared by Women's Health Weekly editors from staff and...Copyright 2008, Women's Health Weekly via NewsRx.com.