Vitamin D, Importance, Deficiency, Latest News

By the skin when exposed to ultraviolet rays of sunlight.

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Vitamin D Latest News

Personalized vitamin D dosing, guided by regular blood monitoring, significantly reduced recurrent heart attacks by 52% in a recent trial.

Vitamin D (also referred to as calciferol) is a fat-soluble vitamin that is naturally present in a few foods, added to others, and available as a dietary supplement.
It is also produced endogenously when ultraviolet (UV) rays from sunlight strike the skin and trigger vitamin D synthesis.
During periods of sunlight, vitamin D is stored in fat and then released when sunlight is not available.
Very few foods have vitamin D naturally. The foods with the most are fatty fish (like salmon and tuna), liver, mushrooms, eggs, and fish oils.
Kids don’t eat these foods a lot. That’s why food companies often “fortify” milk, yogurt, baby formula, juice, cereal, and other foods with added vitamin D.
The amount of vitamin D you need each day depends on your age.

Vitamin D promotes calcium absorption and helps maintain adequate levels of calcium and phosphorus in the blood, which is necessary for healthy bones and teeth.
Without sufficient vitamin D, bones can become thin, brittle, or misshapen.
Vitamin D has other roles in the body, including reduction of inflammation as well as modulation of such processes as cell growth, neuromuscular and immune function, and glucose metabolism.

A lack of vitamin D can lead to bone diseases such as osteoporosis or rickets. Osteoporosis is a disease in which your bones become weak and are likely to fracture (break).
With chronic and/or severe vitamin D deficiency, a decline in calcium and phosphorus absorption by your intestines leads to hypocalcemia (low calcium levels in your blood).
This leads to secondary hyperparathyroidism (overactive parathyroid glands attempting to keep blood calcium levels normal).
Both hypocalcemia and hyperparathyroidism, if severe, can cause symptoms, including muscle weakness and cramps, fatigue, and depression.
Anyone can have vitamin D deficiency, including infants, children and adults.
Vitamin D deficiency may be more common in people with higher skin melanin content (darker skin) and who wear clothing with extensive skin coverage, particularly in Middle Eastern countries.