| 摘要 |
[PROBLEMS] To provide: a fractionation method for extracting an ingredient, particularly a pharmacologically active ingredient such as an iridoid compound, from an Eucommia ulmoides oliver leaf with good efficiency; a fractionation product of anEucommia ulmoides oliver leaf, wherein the fractionation product contains a specific component in a large concentration; and a composition for oral ingestion, pharmaceutical composition, food composition, pharmaceutical or food which comprises a natural material as a raw material, produces little adverse side effects, and is safe even when ingested over a long period. [MEANS FOR SOLVING PROBLEMS] Disclosed is a fractionation product of an aqueous extract of an Eucommia ulmoides oliver leaf. The fractionation product can be produced by a process comprising the step of adsorbing an aqueous extract of an Eucommia ulmoides oliver leaf onto a reverse-phase synthetic adsorbent to yield a component which can be eluted with water, wherein the aqueous extract is prepared from a dried Eucommia ulmoides oliver leaf. Also disclosed is a pharmaceutical or food comprising the fractionation product. |
