Cancer has been attributed to many factors that are considered to be preventable.
- Exposure to toxins and chemicals, or carcinogens
- Cigarette smoke and tobacco products
- Industrial pollutants and pesticides
- Heavy alcohol consumption
- Exposure to infectious agents
- Hepatitis B virus (HBV) and hepatitis C virus (HCV)
- Human papilloma virus (HPV)
- Human immunodeficiency virus (HIV)
- Helicobacter pylori
- Exposure to harmful ultraviolet rays
- Prolonged sunlight exposure
- Tanning beds
- Obesity
- Lack of physical exercise
- Poor nutrition