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By 2030, Half of U.S. Adults Will Have Obesity

The obesity epidemic in the United States continues to grow, and projections are that almost half of the adults in the country will be obese by the year 2030.

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Obesity in America affected about 93.3 million adults (or about 39.9%) in the years 2015 through 2016, according to data from the CDC. (1) The most recent Behavioral Risk Factor Surveillance System (BRFSS) data from 2019 shows that obesity rates exceed 35% in nine states, 30% in 31 states, and 25% in 48 states. (2)

The BRFSS is a national telephone survey of more than 400,000 adults each year and provides the estimates of participants’ height and weight according to the state. Data from this survey, along with the National Health and Nutrition Examination Survey (NHANES), is what the researchers used to collect data and make obesity projections through 2030. The NHANES survey uses data on a variety of health and nutrition measurements to determine the prevalence of major diseases and any risk factors.

Results of the study, published in The New England Journal of Medicine, suggest that nearly 1 in 2 adults will have obesity (48.9%), with the prevalence being higher than 50% in 29 states and not below 35% in any state. Another prediction is that 1 in 4 adults will be severely obese (24.2%), and the prevalence will be higher than 25% in 25 states. (3)

BMI Chart and Types of Obesity

Your BMI indicates if you are underweight, normal weight, or obese.

Body Mass Index (BMI) categories for the study were based on the Centers for Disease Control and Prevention (CDC) guidelines: (4)

  • Underweight: BMI of 18.5 or less
  • Normal weight: BMI between 18.5 to <25
  • Overweight: BMI between 25 to <30
  • Obese: BMI of 30 or higher

Click here for a BMI calculator.

Obesity is divided into classes:

  • Class 1: BMI of 30 to <35
  • Class 2: BMI of 35 to <40
  • Class 3: BMI of 40 or higher

Class 3 BMI may also be called “extreme” or “severe” obesity.

Specific Trends and Projections

With these projections comes certain states and demographics that are at higher risk of being obese. Trends were estimated according to:

  • Sex (male or female)
  • Race or ethnic group (non-Hispanic white, non-Hispanic black, Hispanic, or non-Hispanic other)
  • Annual household income (<$20,000, $20,000 to <$50,000, or >$50,000)
  • Education (less than high-school graduate, high-school graduate to some college, or college graduate)
  • Age group (18 to 39, 40 to 64, or >65)

The results show that obesity and severe obesity are going to be the most common BMI categories among women, non-Hispanic black adults, and low-income adults. Having a lower education and falling within the age group of 40 to 64 also seem to be at higher risk of obesity. (3)

Dealing with severe obesity among low-income adults, and the high medical costs that come with severe obesity, can have serious consequences for future health care costs. Medical expenses for individuals with obesity are $1,429 higher than those of average weight, and the estimated annual medical cost of obesity in the United States was $147 billion in 2008. (1)

Researchers also explored the effects of geography (such as state of residence) within these subgroups.

The top 5 states for overall obesity prevalence include: (3)

  1. Oklahoma (58.4%)
  2. Alabama, Arkansas, and Mississippi (58.2%)
  3. West Virginia (57.5%)
  4. Louisiana (57.2%)
  5. Tennessee (55.8%)

The top 5 states for severe obesity prevalence include: (3)

  1. Arkansas (32.6%)
  2. Oklahoma and Mississippi (31.7%)
  3. Louisiana (31.2%)
  4. West Virginia (30.8%)
  5. Kansas and Alabama (30.6%)

Colorado is one of the states that comes in at the lowest obesity rate projection. The overall obesity percentage is estimated at 38.2%, with severe obesity at 16.8%. Zachary Ward, chief author and Ph.D. candidate at the Harvard T.H. Chan School of Public Health, interviewed with Reuters Health (5) and said Colorado “has always been one of the best states.” He noted, “People do a lot of outdoor stuff there. Income may be higher. Also, a lot of people live at a higher elevation, and there may be something about having to take a little extra energy to do everything at a higher altitude.”

Along with Colorado, the following states had the lowest percentages for both obesity and severe obesity:

  • California (obesity 41.5%, severe obesity 18.3%)
  • Massachusetts (obesity 42.3%, severe obesity 20%)
  • Hawaii (obesity 41.3%, severe obesity 18.2%)
  • New York (obesity 42.8%, severe obesity 19.8%)

How to Prevent Obesity

Obesity is a complex issue and includes achieving and maintaining a healthy lifestyle by the individual. A supportive environment would be helpful in these situations, such as efforts from community leaders, state and local organizations, as well as healthcare professionals to promote healthy living behaviors.

Some ways the community can get involved in promoting healthy food environments, include: (6)

  • Setting nutrition standards for childcare, schools, hospitals, and worksites.
  • Placing nutrition and calorie content on restaurant and fast food menus.
  • Providing incentives for supermarkets or farmer’s markets to establish their business in underserved areas.

Physical activity is also an important factor in living a healthier lifestyle. Communities could encourage the use of paths or trails, or open school facilities for public use.

Physical activity is critical when trying to avoid obesity in America.

Individual changes should consist of healthy eating and regular physical activity that can be sustained long-term. Working with a dietitian or other healthcare provider can be valuable to learn about balancing calories, nutrition information of food, and other areas to promote a healthy weight.

These ideas and strategies are essential because, unfortunately, obesity comes with many health complications. The following conditions are obesity-related and some of the leading causes of preventable, premature death:

  • Heart disease
  • Stroke
  • Type 2 Diabetes
  • Certain types of cancer

Obesity can also cause mental disorders, such as clinical depression and anxiety. Quality of life may decrease, and physical functioning will be increasingly difficult with the additional weight and potential body pain.


Although it is forecasted that about 1 in 2 people in the United States will be obese, and 1 in 4 being severely obese, a communal effort can help turn these numbers around. Educating and promoting healthy eating and physical activity is essential, especially at early stages of life, so healthy behaviors can become established.

1.) Adult Obesity Facts. (2018, August 13). Retrieved January 4, 2020, from

2.) Obesity Rates: Adults. (n.d.). Retrieved January 4, 2020, from

3.) Ward, Z. J., Bleich, S. N., Cradock, A. L., Barrett, J. L., Giles, C. M., Flax, C., … Gortmaker, S. L. (2019). Projected U.S. State-Level Prevalence of Adult Obesity and Severe Obesity. New England Journal of Medicine, 381(25), 2440–2450. doi: 10.1056/nejmsa1909301

4.) Defining Adult Overweight and Obesity. (2017, April 11). Retrieved January 4, 2020, from

5.) Emery, G. (2019, December 18). Half of U.S. adults to be obese by 2030 with one in four severely obese. Retrieved January 4, 2020, from

6.) Community Efforts. (2019, June 18). Retrieved January 4, 2020, from

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