Vitamin D is a type of vitamin that is fat-soluble and stored in the liver and tissue. This type of vitamin is a vitamin that has a very important role in calcium and phosphorus absorption. Vitamin D is very important on the skeletal system, bone development and mineralization of the bone system. There are two types of vitamin D. These; It is vitamin D2 and vitamin D3. Vitamin D is effective on the following body systems;

• skeletal system, 
• Immune system, 
• To prevent the formation of colon and breast cancer, 
• Prevention and treatment of diabetes, 
• skin health, 
• It is a type of vitamin that is very effective on the heart system and is important for health. 

Vitamin D Deficiency Symptoms

Deficiencies of some vitamins are very risky for body health. Vitamin deficiency can cause rapid illness. Today, living standards, working in areas that do not see the sun, living in apartments or houses without a garden, malnutrition / irregular diet and not doing daily exercise can cause vitamin D deficiency. Also not getting healthy sunlight Vitamin D It is one of the most important causes of deficiency. Symptoms of Vitamin D deficiency can be listed as follows;

• General body pain
• Fatigue/weakness,
• Bone/Joint pain,
• Hair loss / flaking on the scalp,
• nail breakage,
• altered mood/depression
• Insomnia,
• frequent infections, 
• Certain growth and developmental retardation, 
• excessive sweating,
• constant cold,
• Disturbance in the perception of place and time,
• Vomiting,
• Constipation,
• weight loss, 
• Hypertension,

Symptoms such as vitamin D deficiency are among the most common symptoms. 

Vitamin D Benefits 

As with every vitamin use, it is important to use vitamin D correctly and as much as the body needs, in terms of benefiting the human body. It is an important criterion to be taken care of correctly and as needed. The benefits of Vitamin D can be listed as follows;  

• It strengthens the immune system.
• It makes the body strong against diseases by fighting viruses and bacteria that cause diseases.
• Regulates mood and treats chronic fatigue.
• It reduces depression.
• It supports bone health by supporting the absorption of calcium and phosphorus.
• By balancing the insulin level, it makes the body strong against diabetes.
• By providing intercellular communication, it ensures the destruction of cancerous cells, and thus it is effective in preventing cancer by supporting the formation of healthy cells.   
• By playing a role in regulating brain development and functions, it regulates the nervous system and treats cognitive disorders.  
• By renewing skin cells, it supports skin repair and quick healing of wounds.

Foods Containing Vitamin D 

Vitamins can be taken from environmental factors (sun), as well as from food. If environmental factors such as the sun and vitamin intake from food are not sufficient, the body's need for vitamin D can be taken with medical supplements. Foods containing vitamin D can be listed as follows;  

Foods:

• Egg yolk
• Mantar
• Orange juice

Dairy products:

• Cow milk
• Yoghurt
• Cheese
• Margarine
• Butter
• Kefir

Animal products:

• Chicken
• Red meat

Sea products:

oily fish; 

• Salmon
• Mackerel
• oysters
• Shrimp
• Sardine
• Anchovy

Vegetables:

• Carrot
• Broccoli

Fruits:

Almost every fruit contains a certain amount of Vitamin D. 

Vegan and Vegetarian Products:

• Grain
• Plant-based milk varieties, such as almond milk
• Soy/Bean Curd

Contains Vitamin D.

What Disorders Cause Vitamin D Deficiency?

Vitamin D deficiency is one of the most common types of vitamin deficiency today. Many diseases can occur due to vitamin D deficiency. Diseases caused by vitamin D deficiency can be listed as follows; 

• Cancer, 
• Constant tiredness,
• Diabetes, 
• Hypertension,
• Depression,
• Rheumatism,
• Heart diseases are caused by vitamin D deficiency. In addition, vitamin D deficiency negatively affects bone density and is considered to be the biggest cause of bone diseases.