Alcohol is not a food, obviously; and some variations of alcohol (e.g. red wine) may produce certain health benefits. Excessive consumption of alcohol, however, is detrimental to overall health.
First, alcohol abuse can damage liver and brain function. Cirrhosis (irreversible scarring) of the liver–is the leading cause of death from long-term alcohol abuse.
Excessive scar tissue causes the liver to become hardened; this can lead to shortage of blood flow to the liver and other vital organs. Cirrhosis of the liver contributed to 1.2 million deaths in 2014, up 150 percent from 1990.