Alcohol is produced during a natural process called fermentation , which occurs when yeast, a microscopic plant that floats freely in the air, reacts with the sugar in fruit or vegetable juice, creating alcohol and releasing carbon dioxide. A similar process is used to make beer.
Distillation is the process used to make beverages with a higher alcohol content.
In this process the fermented liquid is heated until it vaporizes, and then the vapor is cooled until it condenses into a liquid again. When someone drinks an alcoholic beverage it flows into the stomach. While it is in the stomach, the drinker does not feel the effects of the alcohol, but alcohol does not remain in the stomach very long. Some of it is absorbed through the stomach walls into the bloodstream, but most alcohol passes into the small intestine and then into the bloodstream, and this circulates throughout the body. Once alcohol is in the bloodstream it reaches the brain and the drinker begins to feel its effects.