The amount of alcohol considered excessive varies widely from person to person. For some people two drinks a day can lead to problems while others can consume the same amount without any harmful effects. Recent studies suggest that problems with health can begin when more than two drinks per day are consumed. Excessive drinking over time can lead to tissue damage and disease. Also, many people who drink too much do not always eat a healthy diet because alcohol reduces their appetite and takes the place of nutritious foods.
Thiamine is essential for the body's normal use of carbohydrates.
Also, the nerves, muscles, heart, and brain need thiamine to work normally. Alcohol can also damage the lining of the small intestine and interfere with the absorption of nutrients from the small intestine. Alcohol decreases the amount of deep sleep, which may mean a less restful night's sleep. Also, drinking alcohol can make insomnia worse. Although it may help you go to sleep, as the drink wears off, the brain cells become more agitated, which may cause an early awakening.