The present invention relates to the field of biological extraction, and a preparation method of
sturgeon cartilage peptide for increasing
bone density. The method comprises the following steps: a) pretreating fresh
sturgeon cartilage to obtain pretreated
cartilage; b) enzymatically hydrolyzing the pretreated cartilage, adding a composite
enzyme, adjusting the pH value and controlling the temperature to carry out an
enzymatic hydrolysis reaction to obtain an enzymatic
hydrolysate; c) centrifugally separating the enzymatic
hydrolysate to remove insoluble substances to obtain a supernatant; d) subjecting the supernatant to membrane separation to remove macromolecular impurities to obtain a cartilage
peptide concentrate; e)
drying the cartilage
peptide concentrate to obtain
sturgeon cartilage peptide
powder. The preparation method comprises steps such as pretreatment,
enzymatic hydrolysis,
centrifugal separation, membrane separation and
drying. The composite
enzyme is compounded from
protein glutaminase, Lys-C
protease and
alkaline protease. The method of the present invention is simple, efficient, economical and
environmentally friendly, can significantly improve the extraction rate, purity and
biological activity of sturgeon cartilage peptide, reduce production costs, and meet market demands. Through experimental
verification, the composition of the present invention can significantly increase
bone density and effectively prevent and alleviate
osteoporosis.