EGG-DERIVED BONE-STRENGTHENING COMPOSITION

摘要

A bone-strengthening composition of the invention comprises as an active ingredient an egg-yolk protein hydrolysate in which a proportion of the area of the region of a molecular weight of 500 or more and 20,000 or less to the total proportion of the area of proteins, peptides and amino acids is 50% or higher in a molecular weight distribution analysis by gel filtration chromatography. The composition has an action of osteoblast growth promotion, bone growth and bone strengthening, is effective in the prevention and treatment of a variety of bone diseases such as osteoporosis, and is useful as a safe and inexpensive product that can be widely used for a food and drink, a pharmaceutical or a feed and can be taken daily and continuously. The egg-yolk protein hydrolysate is preferably a hydrolysate obtained by defatting egg yolk with an organic solvent and hydrolyzing the resulting powder with a protein hydrolyzing enzyme.