NutriRank

Egg whites, shrimp, cod, and non-fat Greek yogurt top the list for protein efficiency. Chicken breast and tuna are also excellent. These foods provide significant protein with fewer calories, helping maintain satiety during a calorie deficit.

Research suggests that higher protein intakes (1.2 to 1.6 g per kg of body weight per day, or roughly 0.7 g per lb) during a calorie deficit help preserve muscle mass and improve satiety. Aiming for 25-35% of total calories from protein is a common evidence-based recommendation.

Yes, in several ways. Protein has a high thermic effect (20-30% of calories burned during digestion vs. 5-10% for carbs), increases satiety hormones (GLP-1, PYY) and reduces hunger hormones (ghrelin), and helps preserve muscle mass during calorie restriction, which keeps metabolism higher.

For healthy adults, intakes up to 2-2.5 g per kg per day are considered safe. Very high intakes (above 3.5 g per kg) may stress the kidneys over time in people with existing kidney disease, though evidence is limited in healthy people. Meeting calorie targets and overall dietary balance matters more than exact protein ratios.

Protein quality (amino acid profile and digestibility) varies. Animal proteins are generally complete with high leucine content, driving satiety and muscle protein synthesis effectively. Plant proteins can achieve the same effect by combining sources and eating sufficient total protein. Both can be effective for weight management.