Obesity

Overweight and obesity are defined by the WHO as abnormal or excessive fat accumulation that presents a risk to an individuals health.

Overweight and obesity are major risk factors for a number of chronic diseases, including diabetes, cardiovascular diseases and cancer and while it was once an issue only in high income countries, overweight and obesity has now dramatically risen in low- and middle-income countries.Such countries are now facing a "double burden" of disease, for while they continue to deal with the problems of infectious disease and under-nutrition, they are also experiencing a rapid upsurge in chronic disease risk factors such as obesity and overweight, particularly in urban settings.

What is Obesity?

Obesity and overweight have in the last decade become a global problem - according to the World Health Organization (WHO) back in 2005 approximately 1.6 billion adults over the of age 15+ were overweight, at least 400 million adults were obese and at least 20 million children under the age of 5 years were overweight.

Obesity Epidemiology

What is Body Mass Index (BMI)?

Obesity and Exercise

Obesity and Metabolic Syndrome

Obesity and Heart Disease

Obesity in Adults

Obesity in Pregnancy

Obesity and Skin Problems

Obesity and Diabetes

Obesity and Stress

Obesity Management

See more featured articles »

Obesity and Blood Pressure

Obesity and Genetics

Obesity and Sexual Health

Obesity and Infertility

Obesity and Cancer

Obesity and Periodontitis

Obesity in Children

Obesity and Fractures

Obesity and Arthritis

Obesity and Fast Food

Obesity and Anesthesia

What is Obesity Paradox?

Fat Mass and Obesity-Associated Gene (FTO)

Dieting for Obese Children

Causes of Obesity and Overweight

Obesity, What Can be Done?

Obesity and Sleep

Obesity and Autism

What does Sleeve Gastrectomy Involve?

Obesity and Respiratory Disorders

Obesity and Depression

Obesity and Hormones

Abdominal Obesity and the Metabolic Syndrome

Why is Visceral Fat Dangerous?

Latest Obesity News and Research

Severe asthma patients often face multiple overlooked health conditions

Most people living with severe asthma are also battling other health conditions that go under the radar, a major new study has found.

20 May 2026

Women may face greater cognitive impact from dementia risk factors

Researchers from the University of California San Diego School of Medicine found that women not only experience a higher burden of certain modifiable dementia risk factors, but also appear more vulnerable to their effects on cognitive function.

20 May 2026

Ensitrelvir cuts household COVID-19 risk when given after exposure

Ensitrelvir, an oral SARS-CoV-2 3C-like protease inhibitor, reduced symptomatic RT-PCR-confirmed COVID-19 among household contacts when given within 72 hours after symptom onset in the infected index patient. In the phase 3 SCORPIO-PEP trial, COVID-19 occurred in 2.9% of ensitrelvir recipients versus 9.0% of placebo recipients, with similar overall adverse-event rates.

20 May 2026

Researchers identity patients with exceptional tirzepatide response outcomes

Tirzepatide GLP-1 medication is known to improve sleep apnea for people with both obstructive sleep apnea (OSA) and obesity, but not all patients benefit equally.

19 May 2026

UC Davis scientists identify protein key to male fertility

The causes of male infertility can be hard to diagnose, with many tests failing to detect genetic defects. Sometimes, infertility doesn't even involve the genes themselves.

19 May 2026

Pennington and Vanderbilt launch major study on childhood obesity treatment

Pennington Biomedical Research Center, in collaboration with Vanderbilt University Medical Center, has launched a research study, the COACH trial, to test different ways to help children and their families improve their health through lifestyle changes delivered by primary care clinics in communities in Louisiana and Tennessee.

19 May 2026

Nutrition education improves diet quality in university students

Nutrition education at universities shows promise in improving dietary habits and mental well-being, highlighting the importance of healthy eating for students.

19 May 2026

Sleep disturbances during pregnancy may be a risk factor for gestational diabetes

A recent study by Kuopio University Hospital and the University of Eastern Finland shows that sleep disturbances during pregnancy may be a significant risk factor for gestational diabetes mellitus (GDM).

19 May 2026

New report highlights widening cardiovascular health inequalities across Europe

Cardiovascular disease (CVD) remains one of Europe's biggest health challenges, according to new data from the European Society of Cardiology (ESC) Atlas of Cardiology, published in the European Heart Journal.

19 May 2026

Chia seeds may boost fetal brain DHA during obesity-linked pregnancy

Chia seed supplementation during pregnancy increased maternal omega-3 long-chain fatty acids, including DHA, in a rat model of high-fat-high-sugar diet-induced obesity. The findings suggest plant-derived ALA from chia seeds may improve maternal, placental, and mid-gestation fetal brain lipid profiles, but human relevance and offspring outcomes still need testing.

17 May 2026

Endoscopic sleeve gastroplasty outperforms oral semaglutide in short-term weight loss

A comparative study, presented at ESGE Days 2026, has found that endoscopic sleeve gastroplasty (ESG) is associated with significantly greater short-term weight loss than oral semaglutide in adults with obesity.

15 May 2026

How exercise influences cancer cell viability

This interview uncovers how exercise may reduce cancer cell viability, with insights into adipose interactions and innovative 3D culture systems.

From Promega Corporation 15 May 2026

GLP-1 weight loss medications linked to significant drop in asthma flares

New research presented at this year's European Congress on Obesity in Istanbul, Turkey (12-15 May) shows the use of the new GLP-1 class of obesity drugs in people with asthma is associated with a 26 % fall in the number of asthma exacerbations and a 14% drop in use of asthma inhaler reliever use. The study is by Simon Høj and Dr Kjell Erik Julius Håkansson, Copenhagen University Hospital, Copenhagen, Denmark and colleagues.

15 May 2026

New research reassures mothers on NSAID safety during the first trimester

Nonsteroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen and naproxen, taken during the first trimester of pregnancy are not associated with an increased risk of major birth defects, according to a new study published May 14th in the open-access journal PLOS Medicine by Sharon Daniel of Ben-Gurion University of the Negev and Clalit Health Services, Beer-Sheva, Israel, and colleagues.

15 May 2026

New obesity medications offer a potent tool for combating hypertension

A meta-analysis of 32 studies and 43,618 adults presented at this year's European Congress on Obesity in Istanbul, Turkey (12-15 May) shows that use of new classes of obesity drugs for weight loss is associated with a clinically relevant drop in blood pressure (BP): a 0.34 mmHg reduction in systolic BP per 1\% weight loss.

15 May 2026

Art history may help doctors better understand obesity stigma

Understanding how obesity has been portrayed in art across the ages can make doctors more empathic and less judgmental, which should lead to their patients achieving better outcomes, new reasearch at this year's European Congress on Obesity (ECO 2026) argues.

14 May 2026

Obesity drugs and surgery linked to greater fat-free mass loss

A new systematic review and meta-analysis of studies presented at this year's European Congress on Obesity in Istanbul, Turkey (12-15 May) shows that diet and exercise interventions result in a lower proportion of fat-free mass loss compared with obesity surgery or obesity drugs among people undergoing a weight loss of 10% or more.

13 May 2026

Semaglutide significantly reduces obesity in treatment-resistant young adults

A weekly dose of semaglutide (2.4 mg) leads to a clinically significant reduction in body mass index (BMI) and related health outcomes in young adults with severe obesity who are treatment resistant following hospital-based non-pharmacological obesity care during childhood, according to a randomized controlled trial being presented at this year's European Congress on Obesity (ECO) in Istanbul, Turkey (12-15 May).

13 May 2026

Adult weight gain strongly linked to higher obesity-related cancer risk

New research presented at this year's European Congress on Obesity (ECO 2026) in Istanbul, Turkey (12-15 May) shows that people who gain the highest amount of weight across adulthood are at greatly increased risk of certain obesity related cancers.

13 May 2026

GLP-1 obesity drugs mainly reduce fat while preserving muscle mass

New research to be presented at the European Congress on Obesity (ECO2026) in Istanbul, Turkey (12–15 May) shows that following treatment with GLP-1 drugs for obesity, most weight loss is fat mass (80–85%) and relative muscle mass is preserved.

13 May 2026