Are Onions High in Protein? A Look at Onion Nutrition
                                
                                
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                                    5 min read                                
                            
                                A medium-sized onion contains only about 1.2 grams of protein, making it an unlikely candidate for a high-protein food. While not a significant source of protein, onions are packed with a variety of other health-boosting nutrients that make them a valuable addition to any diet.