What is Vitamin D ?

What is Vitamin D ?
What is Vitamin D ?

Vitamin D is one of the essential vitamins in the body responsible for the balance of minerals in the body, especially calcium and phosphorous.

Vitamin D enhances the absorption of minerals in the intestines, prevents excessive loss of these minerals in the kidneys, and controls the entry and exit of minerals into and out of the bones.

In addition, vitamin D helps in the process of regulating cell growth, inhibiting the growth of cancer cells and increasing the activity of the immune system.

*** The most important sources of vitamin D

Sources of vitamin D include the following:

Autogenous production in the skin under the influence of ultraviolet radiation.

​The raw material 7-Dehydrocholesterol is transformed into some intermediate compounds to eventually turn into vitamin D.

*** Some types of foods

​Vitamin D is found in animal and plant-based foods, such as the following:



fish oil.

It is recommended to consume 400-600 IU of vitamin D, and this amount can also be provided by exposure to the sun.

*** Important information about Vitamin D

Vitamin D is a family of steroid hormones and must undergo several changes in both the liver and kidneys before it is functionally ready.

These changes include the following:

In the liver, the vitamin goes through a hydroxylation process, resulting in hydroxyvitamin D25 (D25).

The vast majority of vitamin D is converted into this compound, and the determination of this substance in the blood reflects the state of vitamin D in the body.

The vitamin goes through an additional hydroxylation process in the kidneys to obtain Dihydroxyvitamin D 1,25 (D1,25), which is the active compound of vitamin D in the body.

*** Women and Vitamin D

Low estrogen levels in postmenopausal women negatively affect the production of mineral production in the body, which may increase the risk of osteoporosis.

*** Symptoms of Vitamin D deficiency

Symptoms of vitamin D deficiency include the following:

 Chronic fatigue.

 Chronic and continuous pain in various parts of the body.

 Autoimmune diseases, such as multiple sclerosis and arthritis.


Increased risk of heart disease and high blood pressure.

*** Causes and risk factors of vitamin D deficiency

Causes of vitamin D deficiency include the following:


Not enough exposure to the sun

Decreased ability to absorb vitamin D in the intestine.

Efficiency of self-production of vitamin D declines with age.

Liver diseases.

Kidney failure.

Genetic diseases that affect the production of vitamin D.

***People most at risk of vitamin D deficiency

There is a group of people most at risk of developing a vitamin D deficiency, as follows:

Old age.

Obese people.

Breastfeeding women.

People who live in cold regions.

People with certain diseases, such as: cystic fibrosis, and some inflammatory diseases of the intestine (Crohn's disease).

*** Complications of Vitamin D deficiency

Complications of vitamin D deficiency include:

Osteoporosis, which results in severe deformities of the skeleton and limb bones, especially in children.

Musculoskeletal weakness.

*** Diagnosis of Vitamin D deficiency

Vitamin D deficiency is diagnosed through a blood test that helps determine the levels of the vitamin in the blood.

***Treatment of Vitamin D deficiency

Vitamin D deficiency can be treated through the following:

exposure to sunlight;

Eat foods rich or fortified with vitamin D.

Take pills that contain vitamins.

Intravenous injection of the vitamin.

***Prevention of Vitamin D deficiency

Vitamin D deficiency can be prevented by taking care of good amounts of sun exposure and eating foods that contain good amounts of it.

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