4. Alcohol
Alcohol consumption is associated with an increased risk of cancers of the mouth, throat, esophagus, liver, breast, and colon. Alcohol acts as a solvent, enhancing the penetration of other carcinogens into cells and leading to DNA damage. Even moderate alcohol consumption can increase cancer risk, particularly breast cancer in women .
#17 was the most shocking to me. Some of these are obvious, but a lot of ones I never expected