At 7 calories per gram, it packs almost twice as many calories as either carbohydrate or protein. For this reason alone, it is a serious obstacle for people trying to win the battle of the bulge. Alcohol is produced when yeasts metabolize certain sugars. The source of the sugar determines the type of alcohol.
Gin comes from juniper, vodka from potatoes, wine from grapes, and beer and ale from hops.
Different types of alcohol have different calorie and alcohol levels. Alcohol's effects on the brain are well known. About one in nine people who drink alcohol will abuse it. More than 9 million people in the United States abuse alcohol to the point where it affects their personal relationships, work and health. Excessive alcohol intake can impair the body's ability to absorb nutrients, and so cause malnutrition.