People at high latitudes or the people who all live in the area where there is lot of heavy cloud cover, are never exposed to sunlight many of the years. A recent study have shown that people living in sunny countries or let me make it simple people near the equator have only one- sixth chances of getting affected by pancreatic cancer compared to those live far away from the equator.
If you don’t want direct sunlight, you have allergy from milk then you may be at the higher risk of getting affected by deficiency of vitamin D, also called as sunshine vitamin D. It mostly occurs when the body or skin gets exposed to sun light directly. It is also found in fish, fish liver oils, and egg yolks and also in dairy and grain products.
Vitamin D makes the bone strong, because it helps to use calcium in the body from the diet. But increasingly, research is revealing the importance of vitamin D in protecting against a host of health problems.
How vitamin D works:-
Vitamin D is well known for the blockage of cancer tumours, and it is processed by the liver. The active form of vitamin D is produced known as calcitriol, it provides various positive points against cancer and also encourages the cell to adapt the organ or to commit the cell suicide. It also limits blood supply to the tumours and reduces the chances of cancer.
Symptoms and Health Risks of Vitamin D Deficiency:-

Pain in bone and weakness caused in muscles means that you are suffering from deficiency of vitamin D. Even without observing the symptoms there may chances of people suffering from deficiency of vitamin D which can lead to health risks. Low blood level of the vitamin can be characterized as follows:-
* Cancer
* Cardiovascular diseases leading to death
* Asthma in children
* Cognitive impairment in older adults
According to the study it has been proved that vitamin d plays a major role in preventing and treating number of different conditions which all includes type1, type 2 diabetes, hypertension, and multiple sclerosis.

Food Sources
Vitamin D naturally occur in few food items, and many of the food items are fortified which means that vitamins are been added to the food items.
* Many kind of fish such as fatty fish are the best source of vitamin D
* Dairy products such as cheese, also provide vitamin D as well as egg yolks provide small amount of Vitamin D
* Mushroom is the best source of Vitamin D, many of the breakfast cereals such as orange juice, yogurt provides excellent source for vitamin.
Causes of Vitamin D Deficiency

There are number of reasons for the deficiency to occur which are as follows:-
* Body can only make vitamin D when your body is exposed to sunlight, but there are chances of risk if you are sitting at home animal and if the job is not exposed to sunlight.
* Person with dark skin doesn’t absorb sunlight easily so they may remain un exposed to sunlight.
* Kidney are not so strong to convert vitamin D to its active form, as person grow old their ability of converting to its active form becomes less as a result to which there is high risk of Deficiency of vitamin D
* Many medical problems which include crohn’s diseases, celiac disease, can affect the ability of intestine to convert the vitamin.
* If the person is suffering from obesity, vitamin D is extracted from the blood by the fat cells. People often have low blood levels of vitamin D with the body mass index of 30 or greater.
Prevention:-

Based on the observational studies of the individual and geographic studies of population lower risk of pancreatic cancer are associated with high level of vitamin D. maintaining blood levels above 40 ng/ml may lower the risk of pancreatic cancer.

Side Effects:-

Huge intake of vitamin D can allow the intestine to absorb more of calcium, which can lead to, much amount of calcium in blood which can cause:-
* Damaging the kidney
* Stones in kidney
* Lungs and heart can be filled with calcium deposits
* Vomiting, loss in weight
Treatment for Vitamin D Deficiency:-

* Through diet and supplements vitamin D is added more in body. Depending upon the age and health conditions the level of vitamin D may decrease.
* If in daily routine you are not exposed to sunlight or if you go out in sun covering your whole body then you must consult a doctor for the supplement of vitamin D, particularly if there is deficiency.
* Usage of sunscreen may inhibit the sun rays to enter the body. So, sunscreen should be avoided if possible.

To be rich in Vitamin D exposure to sunlight is compulsory, if it is not possible then diet rich in vitamin D should be taken or supplements are also one of the treatments to increase the level of Vitamin D in your body.