Vitamin D deficiency and insufficiency is now a global public-health problem. According to the American Journal of Clinical Nutrition. A consistent intake of vitamin D is more than necessary for healthy bones. Vitamin D deficiency is more common than previously thought, Particularly among adolescents, women and elderly. Thus, Numerous studies have shown that about 60% of the world population have blood levels of vitamin D below normal, The deficit is greater in those who live in less sunny areas.
Vitamin D is actually a prohormone that shows five forms, But in the human body is found in two: D2 (ergocalciferol) and D3 (cholecalciferol). They are activated by hydroxylation in the liver and kidneys.
Sources of Vitamin D
D2 is found in small quantities in certain products of vegetable origin, And D3 is synthesized in the skin, mostly under the influence of ultraviolet rays or may be brought in the body of nutritional supplements and small amounts of fish oils and other preparations over milk and milk-derived products – like butter, veal liver, Egg yolk.
However, You definitely deficient in vitamin D, If you have any of these diseases, And you should consult your doctor to correct this problem. Here are some common diseases associated with vitamin D deficiency:
Muscle weakness is usually caused by a deficiency of vitamin D, Because high levels of this vitamin is essential for skeletal muscle function. So if you often feel muscle weakness, Without being very physically active, Most likely you have a lack of vitamin D.
A study in Finland involving 10,000 children who received 2,000 international units (IU) of vitamin D3 in the first day of their lives. Children were kept under observation for 31 years and each has reduced by 80% the risk of diabetes type I.
A study published in the journal Cambridge that vitamin D deficiency predisposes respiratory diseases to the children and vice versa, Can reduce the incidence of these diseases through an adequate level of vitamin D in the body.
If you miss often a desire for physical activity, Blame the deficiency of vitamin D. Mood swings are another sign that your body needs foods rich in vitamin D.
Vitamin D stimulates bone growth, So if you lack vitamin D, Your bones become extremely fragile.
Heart failure is associated with vitamin D. A Harvard University study that involved nurses found that women with low levels of vitamin D (17 mg / m [42nmol / L]) had a 67% higher risk of developing hypertension.
Schizophrenia and Depression
These disorders are associated with a deficiency of vitamin D. A study showed that maintaining an adequate intake of vitamin D in pregnancy diet and is essential for vitamin D receptors in the brain responsible for brain development.
Chronic Kidney Disease
Michael F. Holick is an American endocrinologist, specializing in the field of vitamin D, Patients with advanced chronic renal failure (especially those requiring dialysis) are not able to produce an active form of vitamin D. These people should take 1,25-dihydroxy vitamin D3 or an analogue to support calcium metabolism, To reduce the risk of bone disease and to balance the level of parathyroid hormone.