Obesity Shortens Life Expectancy
Obesity Health Concerns
How Obesity Shortens Life Expectancy

Obesity is quickly becoming the most significant health epidemic in the world. Studies have found that obesity shortens life expectancy by up to 10 years. Obesity is the 5th leading cause of death worldwide, with at least 2.8 million people dying due to health complications related to their weight. The sad reality is that the disease of obesity directly or indirectly affects every part of our body.

Obesity is measured using the body mass index (BMI) scale. BMI is calculated based on your height and weight. A BMI of 25 to 30 is considered overweight, 30 to 35 is obese, and 35+ is morbidly obese. 

A BMI greater than 30 increases a patient's risk of developing adverse health conditions. These conditions include high blood pressure, obstructive sleep apnea, type 2 diabetes, high cholesterol, cancers, arthritis, and depression. Obesity is a gateway to all these conditions, reducing life expectancy and quality of life. 

The longer you are affected by obesity, the more these conditions can impact your health and the more obesity shortens life expectancy. Similarly, the higher your BMI, the more complex these conditions are to control and the more severe they tend to be.

How Obesity Shortens Life Expectancy

One study found that obesity shortens life expectancy in individuals with moderate obesity (30 to 35 BMI) by three years, while patients with severe obesity (40+ BMI) may take as much as ten years off their life. 

The primary reason for increased death rates in obese individuals is the prevalence at which obesity causes health problems. As an individual's weight increases, so do the risks of developing significant health complications. Adults who suffer from extreme obesity (BMI of 40+) are at an increased risk of dying from cancer, heart disease, hypertension, and diabetes. 

Effects of Obesity Guide
Effects of Obesity Guide
Learn about the harmful effects obesity has on your body and your health.
Download Guide


Obesity increases the risk of 13 different cancers, making up 40% of all cancer cases diagnosed in the United States annually. The American Cancer Society reports excess body weight is responsible for about 11% of cancers in women and 5% of cancers in men in the United States, and about 7% of all cancer deaths.

Heart Disease

As expected, your diet significantly affects your weight; therefore, overweight individuals are at a higher risk of developing heart disease. Patients who are obese have a 28% increased risk of developing heart disease, while 41% of heart disease deaths are due to obesity. 


5% increase in weight can lead to a 30% increase in the risk of hypertension. Many theories link obesity and hypertension as a result of the kidneys not functioning properly since the kidneys play a vital role in filtering the blood. The heavier a person is, the less effective their kidneys are at removing excess waste and liquid from the bloodstream, ultimately leading to the buildup of waste in the body. 


Diabetes is the 7th leading cause of death worldwide and is the most expensive long-term disease to treat. Type 2 diabetes accounts for about 90% of all cases. Due to the long-term health consequences of diabetes, the risk of early death has nearly doubled, resulting in almost 4 million deaths a year. 


Treating obesity can add more than ten years to your life expectancy and reduce or cure all of the weight-related comorbidities associated with your weight. Therefore, it is critical to recognize obesity as a chronic disease and understand how obesity can shorten life expectancy and quality of life. 

Mike Blaney, MD
Dr. Mike Blaney is a board-certified surgeon with over 20 years of experience in general and bariatric surgery. He is the founding physician of Live Healthy MD which has since been acquired by HCA and now operates under the name Doctors Specialists – Bariatrics and Surgical. Dr. Blaney is co-founder and CEO of Bariatric Centers of America and is fueled by a passion to cure the disease of obesity.
See if this is right for you.
Schedule a consult