Do European wines have less sugar? A look at climate, regulations, and winemaking
                                
                                
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                                    5 min read                                
                            
                                Residual sugar (RS), the leftover grape sugar after fermentation, is the primary determinant of a wine's sweetness. The question of whether European wines have less sugar is more complex than a simple yes or no, depending heavily on winemaking choices and regional climates.