Explore the Effect of Bitter Melon Peptides on Glycemic Control and Metabolic Indicators in Diabetic Patients

The goal of this clinical trial is to learn the potential of bitter melon peptides in stabilizing blood glucose in diabetic adults. It will also learn about the effects of bitter melon peptides on metabolic parameters. The main questions it aims to answer are: * the regulatory effects of bitter melon peptides on glycemic variability * impact on glycemic and metabolic indicators Researchers will compare bitter melon peptides to a placebo (a look-alike capsule that contains Microcrystalline Cellulose) to see if bitter melon peptides works to stabilizing blood glucose. Participants will: * Take bitter melon peptides or a placebo every day for 12 weeks * Visit the clinic on day 0, day 7, day 28 and day 84 for checkups and tests * Glucose levels were monitored continuously by CGMs in the first 7 days and fasting blood samples were drawn at first visit (day0), third visit (day 28) and fourth visits (day 84)