1. Helps regulate blood sugar and diabetes
Excess body fat leads to an increase in adipose tissue, which causes inflammation and interferes with the function of insulin — the hormone that helps regulate blood sugar levels.
Losing weight can also improve heart health by reducing pressure on arteries, meaning the heart doesn't have to work as hard to pump blood through the body. The result is lower blood pressure and low-density lipoprotein (LDL) cholesterol levels — the "bad" kind of cholesterol that can increase your risk of heart disease.
3. Decreased risk of stroke
Excess weight can increase blood pressure, and therefore your risk of stroke. This is because high blood pressure puts a strain on your blood vessels, making them stiffer and more likely to cause blood to clot.
Losing weight alleviates pressure on knees and joints, which can improve mobility, Pusalkar says. A large 2012 study of obese adults with type 2 diabetes found as little as a 1% drop in weight cut mobility limitations, such as difficulty walking or climbing stairs, by more than 7%.
5. Reduced risk of certain cancers
According to the American Cancer Society, excess body weight is thought to be the cause of about 11% of cancers in women and about 5% of cancers in men. Obesity increases your risk of developing several different cancers, including: