A major global study has revealed that nearly half of all preventable cancer cases stem from two common lifestyle habits: smoking and alcohol consumption. Researchers from the World Health Organization (WHO) analyzed cancer data from 185 countries and concluded that healthier lifestyle choices and stronger public health policies could prevent millions of cases each year.
Smoking Remains the Biggest Risk
The study identified tobacco smoking as the leading preventable cause of cancer worldwide. Researchers estimated that smoking alone caused about 15% of all cancer cases reported in 2022. The impact appeared especially severe among men, as smoking contributed to nearly one in four new cancer diagnoses globally. Lung cancer showed the strongest connection to tobacco use, although smoking also increases the risk of cancers affecting the throat, mouth, stomach, pancreas, and several other organs.
Scientists also warned that air pollution continues to raise lung cancer risks in many regions. In parts of East Asia, polluted air contributed to a significant percentage of lung cancer cases among women.
Alcohol’s Hidden Role in Cancer
Alcohol consumption ranked as the second-largest lifestyle factor behind preventable cancers. According to the findings, drinking alcohol caused more than 700,000 new cancer cases worldwide in a single year. Together, smoking and alcohol accounted for nearly 48% of all preventable cancer cases identified in the report.
Researchers explained that alcohol damages body tissues and increases the likelihood of cancers involving the liver, breast, esophagus, and colon. Even moderate drinking can raise cancer risk over time, especially when people combine it with smoking.
Prevention Could Save Millions
Beyond smoking and alcohol, the report also highlighted obesity, physical inactivity, infections, poor diet, ultraviolet radiation, and occupational exposures as major cancer risk factors. Experts believe governments, healthcare systems, and individuals can dramatically reduce future cancer cases through awareness campaigns, vaccination programs such as the HPV vaccine, cleaner environments, and healthier daily habits.
