The present invention relates to a therapeutic agent or prophylactic agent
for a disease requiring promotion of osteogenesis or enhancement of bone
morphogenetic protein production, an agent for promotion of osteogenesis
or an agent for enhancement of bone morphogenetic protein production, and
a food, beverage or feed for promotion of osteogenesis or enhancement of
bone morphogenetic protein production, characterized in that each
comprises as an effective ingredient a processed product derived from a
plant. Also, the present invention relates to a method for measuring an
enhancing action for bone morphogenetic protein production, a method for
screening a substance having an enhancing action for bone morphogenetic
protein production, and a method for preparing a substance having an
enhancing action for bone morphogenetic protein production, each method
using a specified cell.