In the previous intervention studies of Type 2 Diabetes Mellitus patients, changes in blood glucose and insulin resistance profiles before and after intervention indicated that different intervention methods had different effects on outcomes. Therefore, this study intends to explore the effect of the Light-Fat Rice®combined with Active Peptide® on the level of insulin resistance in overweight/obese diabetic patients and its effect on the outcome through a 4-week, randomized, double-blind, controlled clinical trial, further elucidating its intervention mechanism theoretically. The study predicts that dynamic blood glucose(mean blood glucose) and glycosylated albumin will significantly different between the control group and the intervention group.And insulin resistance levels, blood lipids and other indicators wil be improved, and the test group was superior to the control group.All of these will contribute to more scientific and effective Type 2 Diabetes Mellitus's management.

The prevalence of Type 2 Diabetes Mellitus is increasing year by year in the world, causing harm to patients' health and making a huge consumption of medical expenses. Obesity is one of the most obvious risk factors for Type 2 Diabetes Mellitus. There are also many positive studies on nutritional intervention for the treatment of obese patients with Type 2 Diabetes Mellitus at home and abroad. The effect of nutritional meal replacement to relieve the disease has also been widely recognized.

Light-Fat Rice® is a new type of nutritious staple food taking rice, konjac, marine fish oligopeptide powder, inulin and yeast as raw material. Also,there is a protein solid beverage,Active Peptide®,containing soy protein isolate, soy peptide powder, oligofructose,water-soluble dietary fiber and other ingredients,such as multi-vitamin. When used together, it can provide balanced nutrition for the human body while satisfying low fat and high protein. In this study, a 4-week, randomized, double-blind, controlled clinical trial will be conducted to investigate the effects of Light-Fat Rice® combined with Active Peptide® intervention on insulin resistance in overweight/obese diabetic patients and their effects on prognosis,further explaining its intervention mechanism theoretically. Based on a previous review of similar literature studies, 60 of these patients will be enrolled and randomly assigned to the intervention and control groups at 1:1. Among them, the intervention group will be given 80g of Light-Fat Rice® staple food meal as an independent staple food or mixed in the staple food combined with 2 packs Active Peptide®, and the control group was given the same energy-equivalent staple food produced by the same manufacturer daily with 2 packs maltodextrin. Both groups are provided with a same lifestyle guidance by professional physicians based on the "Guidelines for the Prevention and Treatment of Type 2 Diabetes in China 2017", including reasonable diet, exercise guidance, and organization of health education.

Inclusion Criteria:

1. Comply with the diagnostic criteria for type 2 diabetes in the 1999 WHO Diabetes Diagnosis and Classification Standard:

   Clear clinical record of fasting blood glucose (FPG) ≥ 7mmol / L or 75g OGTT（2h） ≥ 11.1mmol / L;

2. T2DM of duration > 1 year（diagnosis based on the 1999 WHO Diabetes Diagnosis and Classification Standard in China ）;

3. Body mass index: 25 kg/m2 < BMI ≤ 35kg/m2;

4. Men and women aged 18-75 years;

5. Volunteer to participate in the trial and sign the informed consent form .

Exclusion Criteria:

1. Acute cardiovascular and cerebrovascular events or myocardial infarction within previous 6 months;

2. Laboratory inspection:

   Liver function: AST and / or ALT ≥ 2.5 × ULN; Renal function: Cr>1.2×ULN;

3. People with severe gastrointestinal diseases, such as active peptic ulcer, intestinal obstruction, etc.;have a history of changes in the normal structure of the gastrointestinal tract;

4. Hypertensive patients with poor blood pressure control(blood pressure SBP≥160mmHg and / or DBP≥100mmHg);

5. Those with severe blood system diseases;

6. Combine other endocrine system diseases(such as hyperthyroidism or hypercortisolism);

7. Patients with stress or secondary blood glucose elevation(such as taking glucocorticoids);

8. Pregnant or lactating women,and women who are not willing to contraception during pregnancy or study;

9. Food or other drug abusers;

10. People who may be allergic to the test food;

11. Those who have participated in other food trials within 3 months;

12. Those who cannot co-operate with mental illness;

13. Other circumstances,which the researcher believes that it is not suitable for the group.

The following data will be shared at the end of the study: demographic data, current medical history, past history; physical examination data collected at 3 visits, including heart rate, blood pressure, height, weight, waist circumference, hip circumference, grip strength, and human body Ingredients, etc.; previous physical examination data provided at baseline such as abdominal ultrasound; laboratory tests such as insulin levels, blood lipid levels, urinary protein levels collected at baseline and 4th week of follow-up; dietary and exercise diaries as well as the dynamic blood sugar changes along with these, etc.

The data is expected to be available after June，20, 2020 and can be used forever.

The information should be used for academic research, medical communication, etc., and is prohibited from being used for commercial gain.