Does Onion Have Sugar? Understanding the Sweetness in Your Savory Dishes
                                
                                
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                                    4 min read                                
                            
                                A 100-gram serving of raw onion contains only about 4.2 to 4.7 grams of natural sugar, mostly composed of simple sugars like glucose and fructose. So, to answer the question, **does onion have sugar?** Yes, but in low amounts that are masked by other compounds when raw.