Low calorie protein supplements
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Low Calorie Protein Supplements: Weight Loss and Body Composition
Protein-Supplemented Low-Calorie Diets for Weight Loss
Low-calorie diets that include protein supplements are widely used for weight loss, especially in people with obesity. Studies show that these diets can lead to significant reductions in body weight, body fat, and waist circumference over both short and long periods Van Gaal1985Cho2024Kirschner1988+1 MORE. For example, a 12-month study found that a protein-supplemented very-low-calorie diet (PSVLCD) led to greater weight loss and reductions in waist circumference and visceral fat compared to a standard calorie-restricted diet . Similarly, very-low-calorie formula diets using high-quality protein supplements have resulted in substantial weight loss and improvements in obesity-related health conditions, with minimal complications .
Preserving Lean Mass and Muscle Strength
A key concern with low-calorie diets is the potential loss of lean body mass. Some research suggests that protein-supplemented low-calorie diets can help preserve lean mass and even improve muscle strength, especially when the protein source is whey or includes added leucine Van Gaal1985Camajani2022Basciani2020. In post-menopausal women with sarcopenic obesity, a low-calorie diet with whey protein and leucine supplementation preserved lean mass and significantly improved muscle strength and function . Another study found that very-low-calorie ketogenic diets (VLCKDs) with whey or vegetable protein were more effective in maintaining muscle performance than those with animal protein .
However, not all studies agree on the extent of these benefits. Increasing the protein content in very-low-calorie diets (from 52 to 77 g/day) did not significantly reduce the loss of lean mass or resting metabolic rate in overweight or obese adults over eight weeks . This suggests that while protein supplementation is important, it may not fully prevent lean mass loss during rapid weight reduction.
Protein Source and Supplement Composition
The type of protein and the caloric density of supplements can influence outcomes. Leucine-enriched whey protein supplements, especially when low in calories, result in higher post-meal blood levels of essential amino acids and leucine, which are important for muscle protein synthesis, particularly in older adults . Whey and vegetable proteins in VLCKDs also appear to have a safer profile for kidney function and promote a healthier gut microbiota compared to animal proteins .
Additional Supplementation and Fat Loss
Adding other supplements, such as thermogenics, conjugated linoleic acid (CLA), and multivitamins, to a high-protein, low-calorie diet can further enhance weight loss and fat reduction, including subcutaneous fat, compared to diet alone .
Special Considerations: Chronic Kidney Disease
For patients with chronic kidney disease (CKD) on low-protein diets, ensuring adequate calorie intake is crucial to prevent protein-calorie malnutrition. Non-protein calorie supplements can improve adherence to low-protein diets and support better kidney function Wu2013Gretz1988. Many low-protein diets may unintentionally be too low in calories, so caloric supplementation and proper dietary counseling are recommended .
Conclusion
Low-calorie protein supplements are effective for weight loss and can help preserve lean mass and muscle strength, especially when using whey or leucine-enriched proteins. The choice of protein source and supplement composition matters, with whey and vegetable proteins offering additional benefits. For those with special health conditions like CKD, ensuring adequate calorie intake alongside protein management is essential. Overall, protein-supplemented low-calorie diets are a valuable tool for weight management and body composition improvement.
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Most relevant research papers on this topic
Anthropometric and calorimetric evidence for the protein sparing effects of a new protein supplemented low calorie preparation.
A new protein-supplemented low-calorie preparation effectively reduces body weight and fat in morbidly obese patients while maintaining lean body mass and muscle circumference.
Effectiveness of a protein-supplemented very-low-calorie diet program for weight loss: a randomized controlled trial in South Korea
A protein-supplemented very-low-calorie diet may be an effective strategy for long-term weight management and body composition improvement in individuals with obesity.
An eight-year experience with a very-low-calorie formula diet for control of major obesity.
A very-low-calorie formula diet with a 420-calorie protein supplement and multidisciplinary counseling provides a reasonable success rate for achieving and maintaining weight loss in morbidly obese patients.
Nonprotein calorie supplement improves adherence to low-protein diet and exerts beneficial responses on renal function in chronic kidney disease.
A nonprotein calorie supplement improves adherence to a low-protein diet and reduces urine protein excretion in patients with chronic kidney disease.
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