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A deficiency occurs if a person doesn't get enough vitamin D from sunlight or food, or if their body can't synthesize or absorb vitamin D properly due to an underlying condition or medication.
Vitamin D3, aka cholecalciferol, is important for bone health and immune function. Experts discuss benefits, sources, risks and who needs a supplement. How to get the most out of vitamin D3
Once you turn 70, your need for vitamin D increases, and women need 20 micrograms per day, Meyer says. Vitamin B12 absorption also decreases with age, so taking a B12 supplement of 2.4 mcg could ...
Feline species and dogs are practically incapable of vitamin D synthesis due to the high activity of 7-dehydrocholesterol reductase, which converts any 7-dehydrocholesterol in the skin to cholesterol before it can be UVB light-modified, but instead get vitamin D from diet. [195] [196] Fish do not synthesize vitamin D from exposure to ...
Cholecalciferol is a form of vitamin D which is naturally synthesized in skin and functions as a pro-hormone, being converted to calcitriol. This is important for maintaining calcium levels and promoting bone health and development. [4] As a medication, cholecalciferol may be taken as a dietary supplement to prevent or to treat vitamin D ...
Because many fungi and protozoa cannot survive without ergosterol, the enzymes that synthesize it have become important targets for drug discovery. In human nutrition, ergosterol is a provitamin form of vitamin D 2; exposure to ultraviolet (UV) light causes a chemical reaction that produces vitamin D 2.
A 3½-ounce serving of sockeye salmon contains an average of 670 international units (IU) of vitamin D, more than the recommended daily value for a person under age 70, according to the U.S ...
The sun isn’t the only way to get more vitamin D. Before stocking up on capsules from the vitamin aisle, evaluate your diet for vitamin D gaps. That’s right: The sun isn’t the only way to ...
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