3. Alcohol
Drinking to excess has a number of health consequences, not the least of which is cancer. Numerous studies point to the link between alcohol and cancers of the esophagus, stomach, liver, colon, and breast.
And though many consider red wine to be healthy due to its antioxidant content, it still contains ethanol. Ethanol is the primary trigger for cancer found in alcoholic beverages. The CDC recommends no more than one drink per day if you’re a woman and two drinks per day if you’re a man.