Yes, alcohol consumption is associated with an increased risk of cancer, particularly breast cancer. Alcohol has effects on cells that include changes in gene expression, and cancer is a dysregulation in cell cycles. Alcohol increases tumor growth and decreases the molecules that suppress and combat tumor growth. Even low to moderate amounts of alcohol can be problematic for cancer. For every 10 grams of alcohol consumed, there is a 4 to 13% increase in risk of cancer. Alcohol can alter DNA methylation and gene expression, which is associated with a significant increase in cancer risk. Alcohol is a toxin that people enjoy the effects of, and it is a substance that people are willing to break the law to sell and provide.