Research. Education. Action.

We are the leading scientific membership organization advancing the science-based understanding of the causes, consequences, prevention and treatment of obesity in order to improve the lives of those affected.

The Obesity Society is a scientific membership organization. We are dedicated to improving people’s lives by advancing the science-based understanding of the causes, consequences, prevention and treatment of obesity.
Access Journal

YOUR VOTE COUNTS!
2020 Council and Nominating Committee Elections

The election opens today, September 17 at 12pm and closes October 5 at 11pm (EST)

VOTE NOW!

September Is National
Childhood Obesity Awareness Month

Learn More

Research. Education. Action.

We are the leading scientific membership organization advancing the science-based understanding of the causes, consequences, prevention and treatment of obesity in order to improve the lives of those affected.

The Obesity Society is a scientific membership organization. We are dedicated to improving people’s lives by advancing the science-based understanding of the causes, consequences, prevention and treatment of obesity.
Access Journal

VOTE!
2020 Council and Nominating Committee Elections

The election opens today,
September 17 at 12pm and
close October 5 at 11pm (EST)

VOTE NOW!

September Is
National Childhood
Obesity Awareness
Month

Learn more

COVID-19 & Obesity

Learn more

Supporting Interactions

The Obesity Society works with professionals and various audiences on:

  • Valuable conferences and educational opportunities, including early-career professional development and achievement programs
  • Informative professional/academic and popular publications
  • Essential financial development and support

Partnerships and Collaborations

NORC (Nutrition Obesity Research Centers)
www.norccentral.org

Funded by NIH (National Institutes of Health)

Increasing Impact

The Obesity Society also helps leaders, investigators and innovators to:

  • Launch and promote needed public health initiatives
  • Translate basic science and clinical trial results into real-world interventions
  • Expand the boundaries of scientific exploration
Contact us for more information

Getting Connected

Learn more

Getting Connected

The Obesity Society connects with experts, government/non-government organizations and the public to:

  • Develop, influence and promote vital policies and public positions
  • Create and implement guidelines and cross-discipline learning, sharing and action that advances healthy behaviors
  • Reduce obesity-related bias

Supporting Interactions

Learn more

Supporting Interactions

The Obesity Society works with professionals and various audiences on:

  • Valuable conferences and educational opportunities, including early-career professional development and achievement programs
  • Informative professional/academic and popular publications
  • Essential financial development and support

Increasing Impact

Learn more

Increasing Impact

The Obesity Society also helps leaders, investigators and innovators to:

  • Launch and promote needed public health initiatives
  • Translate basic science and clinical trial results into real-world interventions
  • Expand the boundaries of scientific exploration
Contact us for more information

News You Can Use

African American BMi associated with severe COVID-19 and ICU admission

Body mass index (BMI) is associated with the development of severe coronavirus disease 2019 (COVID-19)…

Read article

TOS Announces Interactive, Online Format for ObesityWeek®

The Obesity Society (TOS) announced today that it will hold its 38th annual meeting at ObesityWeek® in an interactive, online format titled ObesityWeek® Interactive.

Read article

Intensive lifestyle intervention focused on weight loss lowers obesity-related cancer risk

New research shows that an intensive lifestyle intervention (ILI) aimed at weight loss lowered…

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Intensive behavioral therapy and liraglutide 3.0 mg show positive results for weight loss

Intensive behavioral therapy (IBT) combined with liraglutide 3.0 mg (Saxenda) can produce clinically-meaningful weight loss…

Read article

RESEARCH GRANTS

Promoting and rewarding new ideas in obesity research.

VIEW OPPORTUNITIES

AWARDS

The Obesity Society is proud to recognize the award recipients for 2019!

READ MORE
VIEW OPPORTUNITIES

INFORMATION FOR HEALTH CARE PROVIDERS & PATIENTS

Patient Information Pages

Resources you can use

RESEARCH & CLINICAL RESOURCES

Supplying the latest news about the entire obesity field.

View the Obesity Contributing Factors Info Graphic.
3.969

2018 OBESITY IMPACT FACTOR

OUR JOURNAL’S INFLUENCE

1,200,000

NUMBER OF PEOPLE WITH OBESITY

$225M

CLINICAL AND ECONOMIC IMPACT OF OBESITY

38

NUMBER OF COMORBID DISEASES ASSOCIATED WITH OBESITY

5,307

ATTENDANCE AT OBESITYWEEK® 2018

Continuing a Heritage of Leadership

TOS President

Lee M. Kaplan, MD, PhD, FTOS

lkaplan@obesity.org

Dr. Lee M. Kaplan is director of the Obesity, Metabolism and Nutrition Institute at Massachusetts General Hospital (MGH) and founding director of the hospital’s Weight Center. He is also associate professor of medicine at Harvard Medical School (HMS). Dr. Kaplan’s research focuses on the role of the gastrointestinal tract in the regulation of energy balance and metabolic function, including the mechanism of action of bariatric and metabolic surgery. He has authored more than 200 medical and scientific papers.

Dr. Kaplan is director of the subspecialty fellowship program in Obesity Medicine and Nutrition at MGH; director of the Blackburn Course in Obesity Medicine at HMS; and associate director of the Nutrition and Obesity Research Center at Harvard, which is sponsored by the National Institutes of Health. He is a diplomate of the American Board of Obesity Medicine and a diplomate in internal medicine and gastroenterology of the American Board of Internal Medicine.

TOS President-Elect

Catherine Kotz, PhD, FTOS

ckotz@obesity.org

A leading researcher into the neuroscience of obesity and energy balance, Dr. Catherine Kotz is professor and director of graduate studies at the University of Minnesota’s Department of Integrative Biology and Physiology.

She is also acting associate director of research at the U.S. Department of Veterans Affairs’ Geriatric Research Education and Clinical Center in Minneapolis.

Dr. Kotz is a long-time, active member of TOS and has served on numerous Society committees, including Public Affairs, Nominating, Planning, Finance and Publications.

She has also served on TOS Council and as a spokesperson for the organization. She holds two advanced degrees from the University of Minnesota; a PhD in nutrition sciences and a master of science degree in human nutrition.

TOS Vice President

Dan Bessesen, MD, FTOS

dbessesen@obesity.org

Dr. Dan Bessesen is professor of medicine in the Division of Endocrinology, Metabolism and Diabetes at the University of Colorado, School of Medicine (UCSOM). He is also director of the Anschutz Health and Wellness Center on the campus of UCSOM, the associate director of the Colorado Nutrition Obesity Research Center, and holds the Anschutz Foundation Endowed Chair in Health and Wellness.

Dr. Bessesen has conducted research funded by the National Institutes of Health into nutrient metabolism and the regulation of body weight, and has also researched the care of patients with obesity. He has been a member of TOS since 1995 and has served on multiple committees and in many leadership positions. Dr. Bessesen holds a bachelor’s degree from Colorado State University and received his MD degree from the University of Colorado Denver Health Sciences Center.

TOS Immediate Past President

Steven B. Heymsfield, MD, FTOS

sheymsfield@obesity.org

Steven B. Heymsfield, M.D. is a widely published author, educator and researcher who has extensively investigated topics ranging from obesity and malnutrition to cachexia, body composition and caloric expenditure.

He currently serves as professor and director of the Body Composition-Metabolism Laboratory at the Pennington Biomedical Research Center of the Louisiana State University System in Baton Rouge.

His previous positions include professor of medicine and deputy director of the New York Obesity Research Center at Columbia University.

Dr. Heymsfield has published more than 600 peer-reviewed papers and has received numerous awards for his studies in the field of human nutrition.

TOS Secretary/Treasurer

Leah Whigham, PhD, FTOS

lwhigham@obesity.org

Dr. Leah Whigham is the founding executive director of the Paso del Norte Institute for Healthy Living (IHL) and associate professor in the Department of Public Health Sciences at the University of Texas at El Paso.

Her research has increased our understanding of metabolism as it relates to obesity, the influence of nutrients and immune function on body composition, and the impact of the environment on nutrition and physical activity.

At the IHL, Dr. Whigham oversees a mission to increase healthy eating and active living by providing a bridge between science and application that empowers individuals, families, organizations, and communities to build a culture of health.

Dr. Whigham has a bachelor’s degree in biochemistry from Iowa State University and a PhD in nutritional sciences from the University of Wisconsin, Madison.