High protein low calorie diet
Pro Research Analysisby 
Searched over 200M research papers
High Protein Low Calorie Diet: Weight Loss and Body Composition
Several studies show that high protein, low calorie diets are effective for weight loss and improving body composition in people with overweight or obesity. Both high protein and standard protein low calorie diets lead to significant reductions in body weight, body mass index (BMI), fat mass, and fat percentage, with no major differences between the two in short-term studies of 8 weeks Witjaksono2019Jutamulia2018. However, some research suggests that high protein diets may help with greater satisfaction and less hunger during weight loss, which could support adherence .
High Protein Low Calorie Diet: Metabolic and Cardiometabolic Benefits
High protein, low calorie diets have been shown to improve glucose metabolism and cardiometabolic profiles in people with prediabetes or type 2 diabetes, regardless of whether the protein comes from animal or plant sources . These diets also reduce blood lipids, including total cholesterol and triglycerides, and can improve arterial compliance, which is beneficial for heart health Todurov2022Johnston2004Zuo2016.
High Protein Low Calorie Diet: Weight Loss Maintenance
Maintaining weight loss is a challenge for many. Studies indicate that after initial weight loss, a diet higher in protein and lower in glycemic index can help prevent weight regain better than lower protein diets . High protein, intermittent fasting, low calorie diets may also minimize weight regain and improve vascular health compared to standard heart healthy diets over a year .
High Protein Low Calorie Diet: Body Composition and Muscle Mass
While high protein diets are often recommended to preserve muscle mass during weight loss, some studies found that increasing protein intake in very-low-calorie diets does not significantly prevent loss of lean mass or resting metabolic rate compared to standard protein intake, especially when calories are extremely restricted (<800 kcal/day) . However, protein-supplemented very-low-calorie diets can lead to greater reductions in waist circumference and visceral fat, which are important for metabolic health .
High Protein Low Calorie Diet: Additional Health Effects
In animal studies, high protein, low calorie diets have been linked to increased levels of the anti-aging Klotho protein in the brain, improved neuronal plasticity, and better memory function, suggesting potential benefits beyond weight loss .
Safety and Practical Considerations
High protein, low calorie diets are generally safe and effective for short-term and long-term weight loss, with improvements in body composition and metabolic health markers Todurov2022Cho2024Larsen2010. They are also associated with greater satisfaction and less hunger, which may help people stick to their diet plans . No significant adverse effects have been reported in these studies.
Conclusion
High protein, low calorie diets are effective for weight loss, improving body composition, and supporting metabolic health. They may also help with weight loss maintenance and provide additional health benefits. While both high and standard protein low calorie diets are effective, higher protein intake may offer advantages in satisfaction and long-term weight management.
Sources and full results
Most relevant research papers on this topic