Composition for inhibiting increase of blood sugar level or lowering blood sugar level

Abstract

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.

What is claimed is:  
     
         1 . 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.  
     
     
         2 . The composition of    claim 1   , which has the form of an orally administered tablet.  
     
     
         3 . The composition of    claim 1   , wherein the leaves of Lagerstroemia Speciosa, Linn. or Pers. are dry leaves of Lagerstroemia Speciosa, Linn. or Pers.  
     
     
         4 . The composition of    claim 1   , which has an corosolic acid content of 0.1 to 15 mg per 100 mg of the concentrate.  
     
     
         5 . A method of inhibiting an increase in a blood sugar level, which comprises orally administering the composition of    claim 1    to a patient who is expected to suffer an increase in blood sugar level from a normal blood sugar level.  
     
     
         6 . The method of    claim 5   , wherein the composition of    claim 1    is orally administered to the patient at a dose, as a concentrate, of 50 mg to 1,000 mg per kg of a human body weight per day.  
     
     
         7 . A method of lowering a blood sugar level to a normal level, which comprises orally administering the composition of    claim 1    to a diabetes patient having a blood sugar level higher than a normal level.  
     
     
         8 . The method of    claim 7   , wherein the composition of    claim 1    is orally administered to the patient at a dose, as a concentrate, of 50 mg to 1,000 mg per kg of a human body weight per day.