Top 2 Cancer‑Causing Health Habits: Tobacco and Alcohol

1. Tobacco Use

Smoking cigarettes, cigars, or pipes remains the leading cause of preventable cancer deaths in the United States. Tobacco smoke contains over 7,000 chemicals, many of which are known carcinogens. These substances damage cellular DNA, leading to mutations that can initiate cancer development.

2. Excessive Alcohol Consumption

Heavy alcohol intake raises the risk of several cancers, including liver, esophageal, breast, and head and neck cancers. Alcohol damages cells, impairs DNA repair mechanisms, and can elevate hormone levels (such as estrogen) that promote tumor growth.

Prevention Strategies

• Quit tobacco: Seek support programs, nicotine replacement, or prescription medications to stop smoking.
• Limit alcohol: Follow guidelines—no more than one drink per day for women, two for men.
• Regular screenings: Early detection improves outcomes for many alcohol‑ and tobacco‑related cancers.