<qa>  What is the randomized, double-blind label, interventional study on patients with TThe study is designed as a randomized, double-blind label, interventional study on patients with T2DM. The eligible participants are randomly assigned to control and anthocyanins group. During the 24 weeks trial period, the participants are instructed to consume two anthocyanin capsules or placebo capsules twice daily 30 minutes after breakfast and supper. 