How much protein is in 500 mL?
                                
                                
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                                    3 min read                                
                            
                                According to nutritional data, a standard 500 mL serving of cow's milk offers approximately 16 to 17 grams of high-quality protein. The total amount of protein in 500 mL, however, varies significantly depending on the liquid source, from a few grams in some plant-based milks to over 40 grams in concentrated shakes.