Vitamin D3, also known as cholecalciferol, is a form of vitamin D. It is produced when 7-dehydrocholesterol, which is derived from cholesterol through dehydrogenation, is exposed to ultraviolet light and converted into cholecalciferol. Therefore, the vitamin D precursor of cholecalciferol is 7-dehydrocholesterol.
GET A QUOTE1.What is VITAMIN D3?
Vitamin D3, also known as cholecalciferol, is a form of vitamin D. It is produced when 7-dehydrocholesterol, which is derived from cholesterol through dehydrogenation, is exposed to ultraviolet light and converted into cholecalciferol. Therefore, the vitamin D precursor of cholecalciferol is 7-dehydrocholesterol.
2.How it Works?
Cholecalciferol is converted in the liver by hydroxylase enzymes into 25-hydroxycholecalciferol, which is then further hydroxylated in the kidneys to form 1,25-dihydroxycholecalciferol. This substance is 50% more active than cholecalciferol and has been proven to be the true active form of vitamin D in the body. Moreover, 1,25-dihydroxycholecalciferol is a hormone secreted by the kidneys, thus cholecalciferol is essentially a prohormone. At the same time, vitamin D is a fat-soluble vitamin and is also considered a hormone precursor involved in calcium and phosphorus metabolism. It is closely related to sunlight, which is why it is also called the "sunshine vitamin."
3.Benefits and Uses
Vitamin D3 has the following physiological functions:
Enhances the body's absorption of calcium and phosphorus, allowing plasma calcium and plasma phosphorus levels to reach saturation;
Promotes growth and bone calcification, and contributes to healthy teeth;
Increases the absorption of phosphorus through the intestinal wall and enhances the reabsorption of phosphorus through the renal tubules;
Maintains normal levels of citrate in the blood;
Prevents the loss of amino acids through the kidneys.
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