Diseases, Conditions, Syndromes

Vitamin D deficiency tied to worse outcomes with early kidney disease

Vitamin D deficiency is associated with increased risks for cardiovascular mortality and chronic kidney disease (CKD) progression in patients with early-stage disease, according to a study published online May 11 in the Journal ...


Higher vitamin D levels found to cut bowel resection risk with IBD

An increased serum level of 25-hydroxyvitamin D (25[OH]D) is independently associated with a lower risk for bowel resection with inflammatory bowel disease (IBD), according to a study published online March 25 in the International ...

Oncology & Cancer

How much sun can (and should) I get?

As we slide of out summer, you might be wondering how careful you need to be about sun exposure. Excessive exposure causes skin cancer, but sun exposure also has benefits. How do you balance the two?


Vitamin supplements versus a balanced diet? No contest

Global consumers spent more than $177 billion dollars on dietary supplements in 2023, with at least a quarter of that—roughly $45 billion or more—purchased by Americans, according to a study by Grand View Research, a ...

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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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