Health

Immune study sheds light on vitamin D effects

Scientists have uncovered fresh insights into how vitamin D affects the immune system and might influence susceptibility to diseases such as multiple sclerosis.

Health

Are enhanced waters better for your health?

(HealthDay)—You'll find plenty of nutrient-enriched flavored waters on grocery shelves, but are they any better for your diet than a glass of water with a squeeze of lemon?

Obstetrics & gynaecology

Prenatal high-dose vitamin D not linked to asthma at age 6

(HealthDay)—High-dose vitamin D supplementation in pregnancy is not associated with a child's risk for asthma at age 6 years, according to a research letter published in the March 12 issue of the Journal of the American ...

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Vitamin D

Vitamin D is a group of fat-soluble prohormones, the two major forms of which are vitamin D2 (or ergocalciferol) and vitamin D3 (or cholecalciferol). The term vitamin D also refers to metabolites and other analogues of these substances. Vitamin D3 is produced in skin exposed to sunlight, specifically ultraviolet B radiation.

Vitamin D plays an important role in the maintenance of organ systems.

Vitamin D deficiency can result from inadequate intake coupled with inadequate sunlight exposure; disorders that limit its absorption; conditions that impair conversion of vitamin D into active metabolites, such as liver or kidney disorders; or, rarely, by a number of hereditary disorders. Deficiency results in impaired bone mineralization and leads to bone softening diseases rickets in children and osteomalacia in adults, and possibly contributes to osteoporosis. However, sunlight exposure, to avoid deficiency, carries other risks, including skin cancer; this risk is avoided with dietary absorption, either through diet or as a dietary supplement.

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