well of corse not !!!!!!!!!!!!!!!!!!!!!1
the 'bitter' taste in wine is not actually bitter; it is the dry, puckering feeling that tannin gives. tannin comes from the skin & stems of the grape. so there is no ingredient that makes it bitter. it is the natural effect of the skin and stem during maceration.
The thick bitter liquid derived from soaking the bark of leaves of many plants is called "tannin." Tannin is a type of polyphenol compound that gives plants their astringent taste and is often used in tanning leather or in the production of certain beverages like wine and tea.
Red wine generally has higher tannin content compared to white wine. Tannins come from the grape skins, seeds, and stems, and red wine is fermented with these components for a longer period than white wine, leading to higher tannin levels in red wine.
Tannin
Oak wood is used to build wine barrels. The type of oak affects the wine's colour, flavour, texture and tannin profile. In America, white oak is generally used for wine barrels.
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Foods that contain tannin include red wine, apple juice, apple cider, pears and red-skinned apples. Some people are sensitive to tannin and it can trigger migraines.
Tannin is that chalky taste in the back of your mouth from a tart tasting wine.
'The Wine Is Bitter : The United States and Latin America' by Milton Stover Eisenhower .
Tannin is a natural organic compound found in plant tissues, particularly in fruits, leaves, and wood. It is responsible for the astringency in beverages like wine and tea.
Wine experts believe that for the best taste, decanting is always necessary. Decanting allows the separation of the wine and it's sediments (which can leave the wine tasting bitter).
Tannins cause a slight dry puckering sensation in the mouth.