Forms Of Vitamin D From Least To Most Active
Vitamin D is an essential nutrient that helps our body absorb calcium and maintain healthy bones. It is also important for overall health and well-being. There are different forms of vitamin D, and not all of them are equally active. In this article, we will discuss the various forms of vitamin D from least to most active.
Vitamin D2 (Ergocalciferol)
Vitamin D2, also known as ergocalciferol, is a form of vitamin D that is derived from plants. It is not as active as vitamin D3 and is not produced by the human body naturally. Vitamin D2 is usually obtained through fortified foods, such as milk and cereal, or through supplements.
Vitamin D3 (Cholecalciferol)
Vitamin D3, also known as cholecalciferol, is the most common form of vitamin D. It is produced by the skin when exposed to sunlight and is also found in some foods, such as fatty fish and egg yolks. Vitamin D3 is more active than vitamin D2 and is the preferred form of vitamin D for supplementation.
25-Hydroxyvitamin D (Calcidiol)
25-hydroxyvitamin D, also known as calcidiol, is a pre-hormone that is produced in the liver from vitamin D2 or vitamin D3. It is the main circulating form of vitamin D in the blood and is used to measure vitamin D status. 25-hydroxyvitamin D is less active than vitamin D3, but it is the most reliable indicator of vitamin D status.
1,25-Dihydroxyvitamin D (Calcitriol)
1,25-dihydroxyvitamin D, also known as calcitriol, is the active form of vitamin D. It is produced in the kidneys from 25-hydroxyvitamin D and regulates calcium and phosphate metabolism in the body. 1,25-dihydroxyvitamin D is also involved in immune function, cell growth, and differentiation. It is the most potent form of vitamin D and is used in the treatment of vitamin D deficiency and other medical conditions.
Conclusion
Vitamin D is an important nutrient that plays a crucial role in our health. There are different forms of vitamin D, and their activity levels vary. Vitamin D2 and vitamin D3 are the most common forms of vitamin D, while 25-hydroxyvitamin D and 1,25-dihydroxyvitamin D are the circulating and active forms, respectively. It is important to maintain adequate levels of vitamin D for optimal health.