How Does Vitamin D work?

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How Does Vitamin D work?

Vitamin D is often referred to as the “sunshine vitamin” because it is produced by the body in response to sunlight exposure. However, it is also available in supplement form and found naturally in a limited number of foods. But, how does vitamin D work?

Vitamin D plays an essential role in several bodily functions, but its primary function is to help the body absorb calcium and maintain healthy bones. When the body is exposed to sunlight, the skin produces a form of vitamin D known as vitamin D3. Vitamin D3 is also available in supplement form and is the preferred form of vitamin D for raising blood levels of this important nutrient.

Once vitamin D3 is produced in the skin or absorbed through supplementation, it travels to the liver where it is converted into calcidiol, also known as 25-hydroxyvitamin D. Calcidiol is the major circulating form of vitamin D and is used to determine vitamin D status.

After circulating in the blood, calcidiol travels to the kidneys where it is converted into its active form, calcitriol, also known as 1,25-dihydroxyvitamin D. Calcitriol regulates calcium and phosphorus metabolism, enhances bone mineralization, and also has important roles in immune function, cell growth, and neuromuscular and cardiovascular function.

Therefore, the adequate intake of vitamin D is important for maintaining healthy bones, preventing osteoporosis, and reducing the risk of falls and fractures in older adults. Moreover, recent studies have linked low vitamin D levels with an increased risk of certain types of cancer, autoimmune diseases, and mental health disorders.

In conclusion, vitamin D is a crucial nutrient that plays a significant role in many bodily functions, primarily calcium absorption and bone health. It is produced by the skin in response to sunlight exposure and available through supplements and certain foods. Ensuring adequate intake of vitamin D is important for overall health and well-being.

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