Vitamin D2 promotes the absorption of calcium by the brush border of the small intestinal mucosa and the reabsorption of phosphorus by the renal tubules, increases the concentration of blood calcium and phosphorus, cooperates with parathyroid hormone and calcitonin, promotes the release of calcium phosphate from old bones, and maintains and regulates the normal concentration of plasma calcium and phosphorus. Vitamin D2 promotes the deposition of calcium in new bone formation sites, deposits citrate in bones, promotes bone calcification and the maturation of osteoblast function and bone-like tissue. After vitamin D2 is ingested, it is catalyzed by the 25-hydroxylase system in the cell microsomes to produce calcidiol (25-OHD3), which is catalyzed by the 1-hydroxylase system of the renal proximal tubular cells to produce biologically active calcitriol [1-25-(OH)2D3].

It promotes growth and maintains the normal functions of epithelial tissues such as skin, conjunctiva, and cornea. It also participates in the synthesis of rhodopsin and enhances the photosensitivity of the retina. It participates in many oxidation processes in the body, especially the oxidation of unsaturated fatty acids. When vitamin A is deficient, growth stops, bones grow poorly, reproductive function declines, skin becomes rough and dry, cornea softens, and dry eye and night blindness occur.

Essential substances for human growth and development, especially for the development of fetuses, infants and young children, the integrity of epithelial tissues, and vision

Essential substances for human growth and development, especially for the development of fetuses and infants, the stability of blood calcium and phosphorus, and the growth and development of bones and teeth.

Participate in the formation of antibodies, collagen and tissue repair in the body, as well as the metabolism of sugar, fat and protein, and maintain the integrity of blood vessels

The nine vitamins contained in this product are important components of various coenzymes and hormones in the human body. They are essential substances for maintaining normal metabolism and good health. Their deficiency can cause metabolic disorders and lead to various diseases.

The nine vitamins contained in this product are important components of various coenzymes and hormones in the human body. They are essential substances for maintaining normal metabolism and good health. Their deficiency can cause metabolic disorders and lead to various diseases.

The nine vitamins contained in this product are important components of various coenzymes and hormones in the human body. They are essential substances for maintaining normal metabolism and good health. Their deficiency can cause metabolic disorders and lead to various diseases.

The nine vitamins contained in this product are important components of various coenzymes and hormones in the human body. They are essential substances for maintaining normal metabolism and good health. Their deficiency can cause metabolic disorders and lead to various diseases.

The nine vitamins contained in this product are important components of various coenzymes and hormones in the human body. They are essential substances for maintaining normal metabolism and good health. Their deficiency can cause metabolic disorders and lead to various diseases.

The nine vitamins contained in this product are important components of various coenzymes and hormones in the human body. They are essential substances for maintaining normal metabolism and good health. Their deficiency can cause metabolic disorders and lead to various diseases.

The nine vitamins contained in this product are important components of various coenzymes and hormones in the human body. They are essential substances for maintaining normal metabolism and good health. Their deficiency can cause metabolic disorders and lead to various diseases.

The nine vitamins contained in this product are important components of various coenzymes and hormones in the human body. They are essential substances for maintaining normal metabolism and good health. Their deficiency can cause metabolic disorders and lead to various diseases.

The nine vitamins contained in this product are important components of various coenzymes and hormones in the human body. They are essential substances for maintaining normal metabolism and good health. Their deficiency can cause metabolic disorders and lead to various diseases.

The nine vitamins contained in this product are important components of various coenzymes and hormones in the human body. They are essential substances for maintaining normal metabolism and good health. Their deficiency can cause metabolic disorders and lead to various diseases.

Participate in some metabolic reactions in the body. It can fight against the peroxidation of free radicals, resist aging, protect the skin, enhance ovarian function, and prevent habitual abortion.