About this trial
This study is a randomized clinical trail with a parallel design, involving 120 overweight/obese (body-mass index, BMI ≥ 24 kg/m²) participants and 20 normal-weight participants. Overweight/obese participants will be randomly allocated to one of three groups: 1) calorie restricted balanced diet (CRD)group; 2) CRD + semaglutide group; or 3) CRD + segaglutide with protein supplementation. Through a 3-month weight loss intervention and 6-month follow-up, this study aims to investigate the effects of dietary protein supplementation combined with semaglutide on weight loss, energy and glucose and lipid metabolism, muscle loss, and weight regain. Additionally, the study will explore key factors affecting intervention efficacy, including obesity phenotypes, gut microbiota profiles, genetic backgrounds, and lifestyle factors, to provide evidence for optimizing individualized intervention strategies.
Eligibility criteria
This trial accepts healthy volunteersQualifiers
Aged 20 to 50 years.
Normal-weight participants: 18.5 kg/m² ≤ Body Mass Index (BMI) < 24 kg/m².
Willingness to participate in this study and provide signed informed consent.
Disqualifiers
Waist circumference ≥ 90 cm for men or ≥ 85 cm for women.
Fasting glucose ≥ 6.1 mmol/L or 2-hour postprandial glucose ≥ 7.8 mmol/L, or a confirmed diagnosis of diabetes.
Systolic blood pressure ≥ 130 mmHg or diastolic blood pressure ≥ 85 mmHg, or currently under antihypertensive treatment.
Fasting triglycerides (TG) ≥ 1.7 mmol/L; high-density lipoprotein cholesterol (HDL-C) < 0.9 mmol/L in men or < 1.0 mmol/L in women.
Trial design
Parallel
Treatments tested in this trial
General lifestyle and nutritional education
BehavioralParticipants will receive dietary advice, behavior guidance and nutritional and lifestyle education based on dietary guidelines.
Calorie-restricted balanced diet
BehavioralParticipants will receive dietary advice, behavior guidance and nutritional and lifestyle education by dietitian and physicians. APP-connected wearable devices will be utilized to monitor their dietary intakes and APP-connected scale will be used to monitor their weight changes during interventions.
semaglutide
DrugParticipants will receive semaglutide as medically prescribed
Dietary protein supplementation
Dietary supplementparticipants will receive 30 g/day of dietary protein supplementation
Treatment groups
Trial outcomes
Primary outcomes
Change in Body Weight (kg) from Baseline to Week 12
The change between the baseline and after 12-week intervention. Weight will be assessed using a Seca-255 scale (ScalesGalore).
Secondary outcomes
Change in Energy Expenditure Rate (kcal/minute) from Baseline to Week 12
The change between the baseline and after 12-week intervention. Energy expenditure rate (kcal/minute) will be assessed with a whole-room indirect calorimeter.
Change in Respiratory Quotient from Baseline to Week 12
The change between the baseline and after 12-week intervention. Respiratory quotient will be assessed with a whole-room indirect calorimeter.
Change in Fat Oxidation Rate (g/minute) from Baseline to Week 12
The change between the baseline and after 12-week intervention. Fat oxidation rate (g/minute) will be assessed with a whole-room indirect calorimeter.
Change in Carbohydrate Oxidation Rate (g/minute) from Baseline to Week 12
The change between the baseline and after 12-week intervention. Carbohydrate oxidation rate (g/minute) will be assessed with a whole-room indirect calorimeter.
Sponsors and contacts
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