Astringency is defined by the tactile sensation of dryness and roughness throughout the mouth. It is the complex of sensations due to shrinking, drawing or puckering of the epithelium as a result of exposure to substances such as alums or polyphenols.
This sensation is because of the presence of tannins. These can tightens mucous membranes, contract tissues and decrease inflammation.
Foods with astringent taste tend to be more alkaline. Very few foods are predominantly astringent. Pomegranates, cranberries, teas, red wine and some unripe fruits such as mangoes and apples are examples of more astringent foods. Astringency is created in wine through the presence of tannins.
Astringent is more often a secondary taste to sweet, such as meats. Most beans and grains are primarily sweet with a secondary taste of astringency.
Astringent taste
