Sugars in wine Sugars in wine Sugars in wine are at the heart of what makes winemaking possible. During the process of fermentation, sugars from wine grapes are broken down and converted by yeast into alcohol (ethanol) and carbon dioxide. Grapes accumulate sugars as they grow on the grapevine through the translocation of sucrose molecules that are produced by photosynthesis from the leaves. During ripening the sucrose molecules are hydrolyzed (separated) by the enzyme invertase into glucose and fructose. By the time of harvest, between 15 and 25% of the grape will be composed of simple sugars. Both glucose and fructose are six-carbon
The Wine Advocate Thomases, Jay Miller and Antonio Galloni. While not the first American wine publication, nor the first to use a numerical wine ratings scale, "The Wine Advocate" was the first to widely adopt the 50-100 point scale and use it as parallel to the American educational grading system. This system was familiar to Robert Parker's original target audience—the average American consumer—and provided a guideline for quantifying a wine's quality in a standardize format. Retailers have used "The Wine Advocate's" "Parker scores" to aggressively market wines with high scores. The scores have also become focal points for collectors and wine investors who