This product is a vitamin drug. During tissue respiration, niacin acts as a coenzyme in a variety of enzymes that catalyze important redox reactions. It can be reduced as a receptor for oxygen ions removed from the matrix, and then reoxidized by flavin protein to restore to its original state. Niacin has the effects of dilating blood vessels, lowering blood lipids, reducing cholesterol synthesis, dissolving fibrin, and preventing thrombosis.

It has a direct relaxant effect on respiratory smooth muscle; partly by inhibiting phosphodiesterase to increase the intracellular cAMP content, and partly as a result of the release of endogenous adrenaline and norepinephrine; as a purine receptor blocker, it can counteract the contractile effect of adenine and other substances on the respiratory tract; it enhances the contractility of the diaphragm to improve respiratory function; it has a weak effect of relaxing the coronary arteries, peripheral blood vessels and bile duct smooth muscles; it slightly increases myocardial contractility and has a diuretic effect.

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].

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 is an essential substance for human growth and development, especially for the development of fetuses and infants, the integrity of epithelial tissue, vision, reproductive organs, the stability of blood calcium and phosphorus, and the growth and development of bones and teeth.

It is an essential substance for human growth and development, especially for the development of fetuses and infants, the integrity of epithelial tissue, vision, reproductive organs, the stability of blood calcium and phosphorus, and the growth and development of bones and teeth.