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Vitamin D is produced in the keratinocytes of two innermost strata of the epidermis, the stratum basale and stratum spinosum, which also are able to produce calcitriol and express the vitamin D receptor. [168] Vitamin D 3 is produced photochemically from 7-dehydrocholesterol in the skin of most vertebrate animals, including humans. [169]
Mapping of several bone diseases onto levels of vitamin D (calcidiol) in the blood [6] Normal bone vs. osteoporosis. Vitamin D deficiency is typically diagnosed by measuring the concentration of the 25-hydroxyvitamin D in the blood, which is the most accurate measure of stores of vitamin D in the body.
Vitamin D contributes to your health in several ways and you can up your intake with just a few minutes of sunshine. Here's what else to know.
There are several reasons why — the main factors being lack of sun exposure (the body produces vitamin D when exposed to the sun’s ultraviolet light), location, age and skin color, explains ...
One serving of salmon, for example, has 526 international units of vitamin D — almost all of what you need for a whole day. “Egg yolks, cheese, and beef liver are other foods with smaller ...
Ergocalciferol, also known as vitamin D 2 and nonspecifically calciferol, is a type of vitamin D found in food. It is used as a dietary supplement [3] to prevent and treat vitamin D deficiency [4] due to poor absorption by the intestines or liver disease. [5]
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