• Being overweight or having obesity increases your risk of getting cancer.
• Keeping a healthy weight is an important step you can take to lower your risk of getting cancer.
• People are overweight or have obesity when they weigh more than what doctors consider a healthy weight for their height.
• Body mass index (BMI) is used as a screening tool for overweight and obesity. For adults, a person with a BMI from 25.0 to 29.9 is considered overweight. A person with a BMI that is 30.0 or higher has obesity. About 2 in 5 adults in the United States have obesity.
• For children and teens, BMI is calculated the same way, but interpreted in a different way. A child’s or teen’s BMI is compared to those of the same sex and age. About 1 in 5 children and adolescents in the United States have obesity.
• Being overweight or having obesity are associated with a higher risk of getting 13 types of cancer. These cancers make up 40% of all cancers diagnosed in the United States each year.

Center for Disease Control and Prevention – CDC (Obesity and Cancer | Cancer | CDC)