PROBLEM TO BE SOLVED: To provide a composition accelerating an OPG production, derived not only from osteoblasts but also from intestinal tract-derived cells, and containing an edible and safe food component as an active ingredient.;SOLUTION: This osteoprotegerin (OPG) production-accelerating composition containing quercetin or its derivative as an active ingredient, or the OPG production-accelerating composition containing any of at least one selected from a group consisting of onion, spinach, collard and parsley is provided. The OPG production-accelerating composition is useful for the treatment and prevention of OPG-associated diseases such as osteoporosis, etc., by the OPG production-accelerating effect to the osteoblasts and intestinal tract cells.;COPYRIGHT: (C)2007,JPO&INPIT
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