It is a 4-nitrogen steroid hormone compound and a specific type II 5alpha;-reductase competitive inhibitor. It inhibits the conversion of peripheral testosterone into dihydrotestosterone, reduces the level of dihydrotestosterone in the blood and prostate, skin and other tissues, inhibits prostate hyperplasia by lowering the level of dihydrotestosterone in the blood and prostate tissue, and improves the related clinical symptoms of benign prostatic hyperplasia.

Vitamin A can be converted into retinal in the body and participate in the synthesis of the photosensitive substance - rhodopsin to maintain dark-adapted vision. It can also keep the integrity and soundness of the epithelial tissue structure, thereby enhancing resistance to respiratory and digestive tract infections. It also plays an important role in promoting bone growth, embryonic and gonadal development.

Vitamin D promotes the absorption and transport of calcium and phosphorus in the gastrointestinal tract; decalcifies old bones and forms new bones, promotes bone calcification and osteoblast function and bone-like tissue maturation; increases the reabsorption of calcium and phosphorus by the proximal tubules of the kidneys, thereby maintaining and regulating serum calcium and phosphorus concentrations.

Vitamins A and D are essential substances 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.

Vitamins A and D are essential substances 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.

This product is a prodrug of the adrenaline beta 2 receptor agonist terbutaline. After oral absorption, it is metabolized to terbutaline under the action of enzymes. Terbutaline mainly activates beta 2 receptors, thereby causing bronchial smooth muscle relaxation. In addition, this product also has the effect of inhibiting the release of inflammatory mediators from mast cells.

This product is an endogenous coenzyme B12, which participates in the one-carbon unit cycle and plays an important role in the transmethylation reaction of methionine synthesis from homocysteine. Animal experiments have found that this product is easier to enter neuronal organelles than cyanocobalamin, participates in the synthesis of thymidine nucleoside in brain cells and spinal cord neurons, promotes the utilization of folic acid and nucleic acid metabolism, and has a stronger effect on promoting nucleic acid and protein synthesis than cyanocobalamin. This product can promote axonal transport function and axonal regeneration, normalize the transport of axonal skeleton proteins in the sciatic nerve of diabetic rats induced by streptozotocin, and has an inhibitory effect on drug-induced neurodegeneration, such as neurodegeneration caused by adriamycin, acrylamide, and vincristine, and neurological diseases in spontaneously hypertensive rats. In rat tissue culture, it was found that this product can promote lecithin synthesis and neuronal myelination. This product can restore delayed synaptic transmission and neurotransmitter reduction to normal, restore end plate potential induction by increasing nerve fiber excitability, and restore acetylcholine in the brain of rats fed with choline-deficient feed to normal levels. Toxicological studies Reproductive toxicity: When rats and mice were orally administered 0.2, 2.0, and 20 mg/kg/d of this product during the teratogenic sensitive period, no abnormalities or teratogenic signs were observed in the fetuses and newborns.