How much protein is in a cut of sirloin?
                                
                                
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                                    4 min read                                
                            
                                According to the USDA, a 3-ounce (85g) cooked serving of sirloin steak contains approximately 23 grams of high-quality protein. Sirloin is a powerhouse of complete protein, which is essential for building and repairing muscle tissue and can also help increase satiety.