Quick Facts

• High-protein intermittent fasting led to 18 pounds of weight loss over 8 weeks in a new study
• Participants ate 1,450-1,800 calories most days with one to two very low-calorie fasting days weekly
• Protein pacing involves eating 25-50 grams of protein every 3-4 hours during eating windows

A new study offers hope for people stuck at weight loss plateaus. Research published in the Obesity Journal found that combining high-protein eating with intermittent fasting produced more weight loss than traditional heart-healthy diets.

The study tracked 39 overweight and obese adults with sedentary to lightly active lifestyles. Participants following the high-protein intermittent fasting approach lost an average of 18 pounds over eight weeks.

The eating plan required participants to consume around 1,450 calories for women and 1,800 calories for men most days. On one to two days each week, they ate very few calories while intermittent fasting.

Research published in Nature Communications compared this approach to standard heart-healthy calorie restriction. The protein-focused method proved more effective for both gut health and weight loss.

“Protein pacing – distributing protein intake evenly throughout the day – can help maintain muscle mass and promote satiety,” said Marilia Chamon, a registered nutritional therapist. “This can be a good approach to weight loss as it typically makes you feel fuller for longer, reduces cravings, and, in the long term, can contribute to the development of muscle mass.”

The method involves eating four high-protein meals containing 25-50 grams of protein each. Meals are spaced at regular intervals throughout the day, typically every three to four hours during eating windows.

Protein offers metabolic advantages over other nutrients. The body burns 20-30% more calories digesting protein compared to fats or carbohydrates. This thermic effect means protein digestion itself burns more calories.

Weight loss plateaus typically begin six months after starting a low-calorie diet, according to a 2014 study in the American Journal of Clinical Nutrition. The body adapts through a process called adaptive thermogenesis, where resting energy expenditure decreases to match lower caloric intake.

A separate 8-week randomized controlled trial found that protein-enriched intermittent meal replacement combined with moderate exercise achieved greater body weight reduction than training alone. Participants lost 3.70 kg compared to 1.17 kg in the exercise-only group.

UC Irvine research suggests that traditional diet switching alone cannot overcome six-month plateaus. The findings indicate that physical adaptations require new approaches beyond simply changing diet types.

Obesity affects over 1.5 billion adults globally and is projected to reach 1.53 billion by 2035. Intermittent fasting has emerged as a potential alternative to continuous calorie restriction for weight management.

The protein-pacing approach maintains muscle mass while burning fat. Since resting muscle burns more calories than fat tissue, preserving muscle mass supports continued weight loss.

Read more: Stuck At A Weight Loss Plateau? This Eating Plan Might Help, Research Finds