AGENT FOR PREVENTING OR AMELIORATING DIABETES

摘要

The purpose of the present invention is to find a component that is capable of effectively exerting various effects of, for example, preventing or ameliorating diabetes, preventing or ameliorating metabolic syndrome, ameliorating insulin resistance, inhibiting postprandial blood glucose level rise and inhibiting α-glucosidase activity and has a high safety. Provided are an agent for preventing or ameliorating diabetes, etc., said agent comprising, as an active ingredient, a component of a hybrid plant produced by crossing Camellia sinensis with Camellia taliensis. It is preferable that the hybrid plant is "Sun Rouge". Also, it is preferable that each of the aforesaid agents contains a tea leaf extract of the hybrid plant.