Use of collagen particles in promoting hair follicle formation or angiogenesis

The invention relates to an application of collagen particles in preparation of a medicine for promoting individual hair follicle generation or angiogenesis. The collagen particles have a particle size of about 10-200 microns, and are administered to the individual in an effective amount of about 0.1 mg/cm < 2 > to 1000 mg/cm < 2 >. The preparation method comprises the steps of supercritical carbon dioxide treatment, alkali treatment and hydrogen peroxide treatment, and no organic solvent or cross-linking agent is used. 一种胶原蛋白颗粒用于制备促进个体毛囊生成或血管生成的医药品的用途。所述的胶原蛋白颗粒具有约10-200微米的粒径，以约每平方厘米0.1毫克至每平方厘米1000毫克的有效量施予该个体。制备方法包括超临界二氧化碳处理、碱处理和过氧化氢处理，不使用有机溶剂和交联剂。