| abstract |
(57) [Problem] To provide a combination tea capable of preventing or improving diabetes. SOLUTION: A mixed tea in which the ground yacon and the mulberry leaf are mixed, preferably 0.3 to 3.0 parts by weight of the mulberry leaf with respect to 1 part by weight of the ground yacon as the dry weight. [Effect] Compared to the case where the yacon aerial part and the mulberry leaf are used alone, the combination tea clearly enhances the improvement of abnormal glucose tolerance. |