Ejiao is an ancient traditional product with a long production history and a medicinal history of more than 2,000 years. It is a solid glue made from dry or fresh skins of equine donkeys after decoction and concentration. It is called together with ginseng and deer antler. Three treasures for nourishing. The manufacturer of 4-hydroxy-L-isoleucine reported that donkey-hide gelatin was first published in "Shen Nong's Materia Medica" and was listed as top-grade. Tao Hongjing said that he went to Dong'er, hence the name Ejiao.

4-Hydroxy-L-isoleucine manufacturers generally believe that the peptides and amino acids that make up proteins are hematopoietic substances, which help blood cell proliferation, differentiation, maturation and release, enhance body metabolism, and promote blood cell production. The iron element in donkey-hide gelatin is more than 10 times that of other elements. Iron itself is a component of hemoglobin and myoglobin, and is also involved in the synthesis of cytochromes and cytochrome enzymes. The zinc element in Ejiao is second only to iron. Traditional Chinese medicine believes that the zinc content in the blood of patients with weak spleen Qi is significantly lower than normal, and Ejiao can also adjust the ratio of zinc to copper in the blood, which is beneficial for the treatment of deficiency syndrome. Amino acids and trace elements are easy to form integrated products, which are easy to absorb, have good stability, and can improve the biological utilization of trace elements.

Glycine in donkey-hide gelatin promotes the synthesis of hemoglobin by regulating serum iron; arginine can increase the secretion of growth hormone and testosterone, and promote the synthesis of hemoglobin; threonine, histidine, and lysine all have hematopoietic effects. The manufacturer of 4-hydroxy-L-isoleucine understands that donkey-hide gelatin is rich in iron and a large amount of animal protein. It is an easily absorbed iron supplement. Long-term use can increase the intake of iron in the body. , Restore the physiological function of iron in the body, and effectively control iron deficiency anemia. Copper is an important component of dozens of enzymes and a constituent element of red blood cells. It also promotes iron utilization and hematopoietic processes, and participates in immune mechanisms and the synthesis of elastin.