What is 4 calories of protein equal to?
                                
                                
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                                    4 min read                                
                            
                                According to the U.S. Department of Agriculture (USDA), a single gram of protein contains 4 calories. This means that when you ask, "What is 4 calories of protein equal to?", the answer is precisely one gram of protein. This fundamental nutritional fact is key to understanding how to calculate and manage your daily macronutrient intake for optimal health.