PURPOSE: A beverage composition is provided to have an excellent preference and effective prevention of glucose-related diseases by using mulberry leave extract or fermented product. CONSTITUTION: A beverage composition contains mulberry leaves extract 5-15wt% and unpolished rice extract 0.5-3wt%. The solid component density of the beverage composition is 0.1-1.0 brix. The beverage composition contains mulberry leaves fermented product 20-30wt%, crystalline fructose 0.1-0.5wt% and apple concentrate 0.05-0.5wt%. The mulberry leaves fermented product is manufactured by fermenting a mixture of mulberry leaves, unpolished rice extract and salt with Bacillus coagulans. [Reference numerals] (AA) Embodiment 1; (BB) Embodiment 4; (CC) Embodiment 5; (DD) Inhibition activity(%, Unit); (EE) Alpha-amylase; (FF) Alpha-glucosidase본 발명은 뽕잎 추출물 또는 발효물을 함유하는 음료 조성물에 관한 것으로서, 뽕잎의 향, 색 또는 맛을 증가시켜 기호성을 개선하고, 뽕잎 특유의 청내를 제거함으로써 음용을 용이하게 하여 당질 관련 질환의 예방에 효과적일 수 있는 음료 조성물에 관한 것이다.