PURPOSE: Extract with an anti-diabetic effect, a method for preparing the same, and food including the same are provided to be effective to adult diseases including diabetes, hypertension, obesity, heart disease, and arteriosclerosis by including dandelion, the root of Pueraria lobata, Aurantii nobilis pericarpium, jujube, Glycyrrhiza, and Poria cocos. CONSTITUTION: Taraxacum platycarpum 75~85.09 weight%, the root of Pueraria lobata 2.45~4.57 weight%, Aurantii nobilis pericarpium 5.06~8.36 weight%, jujube 4.23~8.12 weight%, Glycyrrhiza 2.16~2.80 weight%, and Poria cocos 1.01~1.15 weight % are mixed to prepare a mixture. The mixture is added in purified water, and extract is extracted at the temperature between 100 and 120 degrees Celsius for 3 to 7 hours. The extract is filtered and sterilized at the temperature between 90 and 110 degrees Celsius for 30 to 60 minutes.본 발명은 항당뇨 효과가 우수한 추출물, 이의 제조방법 및 상기 추출물을 포함하는 식품에 관한 것으로 보다 상세하게는 민들레, 갈근, 진피, 대추, 감초 및 복령을 혼합한 혼합물을 정제수에 첨가하고 추출하여 추출물을 얻는 단계를 포함하는 항당뇨 효과가 우수한 추출물, 이의 제조방법 및 상기 추출물을 포함하는 식품에 관한 것이다.
