Preparation for inhibiting elevated blood sugar or lowering blood sugar levels

摘要

A composition for inhibiting an increase in, or lowering, a blood sugar level, which comprises, as a main component, a concentrate of a hot water or alcohol extract of leaves of Lagerstroemia Speciosa, Linn. or Pers. and has an corosolic acid content of 0.01 to 15 mg per 100 mg of the concentrate, and a method of inhibiting an increase in, or lowering, a blood sugar level by oral administration of the composition.