L-Allothreonine (L-allo-Threonine) is an essential amino acid in humans. L-Allothreonine is abundant in human plasma, particularly in newborns. Severe deficiency of threonine causes neurological dysfunction and lameness in experimental animals. L-Allothreonine is an immunostimulant which promotes the growth of thymus gland. L-Allothreonine also can probably promote cell immune defense function. L-Allothreonine is highly concentrated in meat products, cottage cheese, and wheat germ.

多项动物实验研究证实了关节内注射HA的效果。研究表明，HA促进软骨基质的合成，防止其降解，减少炎症，刺激内源性HA的合成，并提高软骨的弹性及保湿性。局部应用高分子量HA制剂能促进新鲜皮肤伤口的愈合，同时也有助于静脉性腿部溃疡的愈合，并在慢性伤口管理中发挥作用。