Vitamin D is considered an essential nutrient for the body, but in fact it is a hormone that is produced in the body when it is exposed to sunlight. It can also be obtained from some certain foods.

Vitamin D absorbs calcium in the digestive system and helps maintain a stable level of calcium in the blood. As a result of its deficiency, this can lead to a decrease in the absorption of calcium from food, and the release of calcium from the bones in order to maintain a constant percentage of calcium in the blood.

Many studies have shown that vitamin D is linked to bone health, but new scientific research conducted by a team of researchers at Queen Mary University indicates an additional role for this vitamin in preventing cold, flu, and asthma attacks. It also helps strengthen immune cells to combat any bacterial or viral infection.

Vitamin D can be obtained from some food sources, such as fatty fish, milk, cheese, eggs, orange juice, and breakfast cereals. Daily exposure to sunlight is one of the easiest ways to obtain vitamin D. The skin must be exposed to the sun for 5 to 15 minutes daily, taking care to avoid prolonged exposure to sunlight to avoid skin damage and the risk of skin cancer.

Ultimately, vitamin D is one of the essential nutrients the body needs to maintain healthy bones, teeth, and immune system. It can be obtained from the foods mentioned above, and it can also be obtained from exposure to sunlight on a regular basis. However, care should be taken not to take excessive doses of vitamin D, as these high doses can cause calcium accumulation in the body, thus increasing the risk of diseases associated with calcium deposits in the blood vessels and soft tissues of the body.

Ultimately, individuals who have vitamin D deficiency or iron deficiency and suffer from anemia should talk with their doctors to determine the best nutritional and supplement options for their health condition.