I know people who constantly drink to much. This leads to alcoholism
So do I. It's horrible! It can damage the brain, heart, liver, pancreas, and immune system!
Unfortunate for the drinker, they often relapse.  I'm afraid they make bad choices and put other at risk, especially when they drive while drinking
cells) to send signals to other nerve cells. The brain includes several distinct dopamine pathways, one of which plays a major role in the motivational component of reward-motivated behavior. The anticipation of most types of rewards increases the level of dopamine in the brain, and many addictive drugs increase dopamine release or block its reuptake into neurons following release. Other brain dopamine pathways are involved in motor control and in controlling the release of various hormones. These pathways and cell groups form a dopamine system which is neuromodulatory.
In
. Alcohol contributes to cancer through this process.
While lower quality evidence suggests a cardioprotective effect, no controlled studies have been completed on the effect of alcohol on the risk of developing heart disease or stroke. Excessive consumption of alcohol can cause liver cirrhosis and alcoholism. The American Heart Association "cautions people NOT to start drinking ... if they do not already drink alcohol. Consult your doctor on the benefits and risks of consuming alcohol in moderation."
Alcoholic drinks are classified by the International Agency for Research on Cancer (