However, the probability of foreign growth taking place in it during the aging process could not be ruled out. Since ethanol acts as a natural antiseptic, it would be added. This process, known as fortification, is usually done using distilled natural spirits that include the ones that have been distilled from grapes, sugar, beet, grain, and sugarcane. It influences the wine characteristics such as aroma, flavor, density, color, and taste. Common fortified wines include Madeira, sherry, port, marsala, and vermouth.