Do Calories Matter in a High-Protein Diet?
                                
                                
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                                    5 min read                                
                            
                                In a 2005 study, participants consuming 30% of their total calories from protein automatically ate 441 fewer calories per day, demonstrating protein's powerful impact on appetite control. While a high-protein diet offers significant metabolic advantages, the fundamental laws of thermodynamics still apply: to lose or gain weight, your total calorie intake relative to expenditure is the ultimate determinant. So, do calories matter in a high-protein diet? The short answer is yes, but the context is more nuanced.