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Vitamin D supplements, with or without calcium, are important for overall health. However, vitamin D supplements have no effect on preventing falls or fractures in older adults, according to the U ...
Since vitamin D is a fat-soluble vitamin, too much can put you at serious risk for toxicity including adverse side effects like kidney stones and high calcium levels in the blood. Our experts say ...
Vitamin D is a group of structurally related, fat-soluble compounds responsible for increasing intestinal absorption of calcium, magnesium, and phosphate, along with numerous other biological functions. [1] [2] In humans, the most important compounds within this group are vitamin D 3 (cholecalciferol) and vitamin D 2 (ergocalciferol). [2] [3]
Most multivitamins contain vitamin D but usually a lower amount than pure vitamin D supplements. Healthy adults typically get enough vitamin D from sunlight, foods and multivitamins with vitamin D.
Elderly people have a higher risk of having a vitamin D deficiency due to a combination of several risk factors, including decreased sunlight exposure, decreased intake of vitamin D in the diet, and decreased skin thickness, which leads to further decreased absorption of vitamin D from sunlight.
Vitamin D (the inactive version) is mainly from two forms: vitamin D 3 and vitamin D 2. Vitamin D 3, or cholecalciferol, is formed in the skin after exposure to sunlight or ultra violet radiation or from D 3 supplements or fortified food sources. Vitamin D 2, or ergocalciferol, is obtained from D 2 supplements or fortified food sources. [3]