What Percent of Lemon is Sugar? The Sour Truth
                                
                                
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                                    4 min read                                
                            
                                According to USDA data, a 100-gram serving of raw lemon contains just 2.5 grams of sugar. This means only a very small percent of lemon is sugar, a fact that often surprises people due to the fruit's association with sweetness in recipes and drinks.