How many calories and protein are in a prime ribeye steak?
                                
                                
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                                    5 min read                                
                            
                                According to the USDA, a 3.5-ounce (100-gram) serving of ribeye steak can contain around 291 calories and 23 grams of protein. Understanding how many calories and protein are in a prime ribeye steak, specifically the superior grade, is key for diet tracking, whether you're building muscle or managing your weight.