vitamin D


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Related to vitamin D: vitamin D3, Vitamin D deficiency

vitamin D

[′vīd·ə·mən ¦dē]
(biochemistry)
Either of two fat-soluble, sterol-like compounds, calciferol or ergocalciferol (vitamin D2) and cholecalciferol (vitamin D3); occurs in fish liver oils and is essential for normal calcium and phosphorus deposition in bones and teeth. Also known as antirachitic vitamin.
References in periodicals archive ?
Researchers said that in just four months, high-doses of vitamin D reduce arterial stiffness in young, overweight/obese, vitamin-deficient, but otherwise still healthy African-Americans.
Vitamin D is naturally found in fish, including halibut, salmon, mackerel, rainbow trout, and tuna, and egg yolks.
Vitamin D acts on vitamin D receptors (VDR) in target cells, where it forms heterodimers with the retinoid X receptor (RXR), which activate vitamin D target genes.
7% (64) doctors prefer to prescribe tablet form of Vitamin D instead of injection as oral form for vitamin D deficiency among their patients.
Compelling research has demonstrated that vitamin D blood levels in the range of 50 to 80 ng/mL are associated with reduced mortality and a lower risk of common diseases.
As long as you're in a green, yellow, or red area--in other words, pretty much anywhere on the map--your body will easily make vitamin D when uncovered skin is exposed to the sun's UVB radiation in June.
Current government advice is that at-risk groups, including pregnant women, children up to the age of five, adults over 65, and people with darker skin as well those who do not expose their skin to sunlight, should take a daily vitamin D supplement.
The Vitamin D Foundation, however, points out that the earth's atmosphere blocks UVB rays early and late in the day and during most of the winter.
However, rather than easing up on a dogmatically held conviction to shun the sun at all costs, they encourage patients to take vitamin D supplements.
Vitamin D comes in several forms; the two most commonly found in foods and supplements are vitamin D2 (ergocalciferol) and D3 (cholecalciferol).
Speaker after speaker at a public conference on vitamin D sponsored by the National Institutes of Health acknowledged that there is general disagreement among well-respected scientists and medical organizations not only about recommended intakes, but about whether supplementation of vitamin D (25-hydroxyvitamin D) has any impact on ailments ranging from depression and nonspecific pain to hypertension and fall prevention.
The fact that the relationship between vitamin D concentration and cognitive performance seemed more robust in the non-demented subset suggests that earlier intervention before dementia is present may be more effective," Dr.