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 and Diabetes

Obesity and Periodontitis

Obesity Epidemiology

Obesity and Metabolic Syndrome

Obesity and Respiratory Disorders

What does Sleeve Gastrectomy Involve?

Obesity in Adults

Abdominal Obesity and the Metabolic Syndrome

What is Body Mass Index (BMI)?

Obesity and Fractures

Fat Mass and Obesity-Associated Gene (FTO)

See more featured articles »

Obesity and Heart Disease

Obesity Management

Obesity and Blood Pressure

Obesity and Sexual Health

Obesity and Exercise

Obesity and Sleep

Obesity and Autism

Obesity and Fast Food

Obesity and Arthritis

Obesity and Cancer

Causes of Obesity and Overweight

Obesity in Pregnancy

Obesity and Stress

Obesity and Infertility

Why is Visceral Fat Dangerous?

Obesity in Children

Obesity and Skin Problems

What is Obesity Paradox?

Dieting for Obese Children

Obesity and Depression

Obesity and Hormones

Obesity and Anesthesia

Obesity and Genetics

Obesity, What Can be Done?

Latest Obesity News and Research

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

Too little or excessive sleep may accelerate organ aging

An analysis of biological clocks throughout the human body suggests that too few hours of sleep-and too many-may speed aging in the brain, heart, lung, and immune system and is associated with a wide range of diseases.

13 May 2026

Why experts say PCOS needs a new name

A Lancet Health Policy paper reports an international consensus process that selected polyendocrine metabolic ovarian syndrome (PMOS) as the new name for polycystic ovary syndrome (PCOS). The change aims to shift the focus away from ovarian cysts and better reflect the condition’s endocrine, metabolic, and ovarian features.

13 May 2026

Higher body mass index linked to financial problems, loneliness, and stress

New research presented at this year's European Congress on Obesity in Istanbul, Turkey (12-15 May) shows that higher body mass index (BMI) is associated with more financial problems, loneliness, and stress.

13 May 2026

Gut microbes may reveal why diabetes raises heart disease risk

Integrated gut microbiome and plasma metabolomics profiling identified distinct microbial and metabolic signatures in people with T2DM and T2DM-CAD. In a small exploratory cohort, Bacteroides sp._CAG_875 and 12-ketoLCA emerged as candidate markers that may help distinguish diabetic patients with coronary complications, pending larger validation.

13 May 2026

Once-daily orforglipron helps preserve weight loss after semaglutide or tirzepatide

Oral orforglipron helped adults maintain clinically meaningful weight loss after prior injectable tirzepatide or semaglutide therapy. The phase 3b ATTAIN-MAINTAIN trial suggests switching to once-daily oral therapy may help reduce weight regain when injectable treatment is discontinued.

13 May 2026

Study links obesity with fewer pleasant emotions during physical activity

A recent study conducted at the University of Jyväskylä investigated the emotions evoked by physical activity and what motivates people across different weight groups to exercise.

13 May 2026

Adding GLP-1 drugs to behavioral interventions silences food noise

New research presented at this year's European Congress on Obesity in Istanbul, Turkey, shows that use of obesity drugs alongside behavioral interventions leads to a larger drop in so called 'food noise' than in those using the behavioral therapy alone.

13 May 2026

Sports coaches can improve health for athletes with disabilities

Research highlights the role of sports coaches in enhancing health for athletes with disabilities, focusing on collaboration and effective health promotion.

13 May 2026

Endometriosis increases risk of some birth defects in infants

Research indicates women with endometriosis may face a higher risk of congenital anomalies in infants, emphasizing the need for further investigation.

13 May 2026

Could GLP-1 drugs help breast cancer patients live longer?

A large retrospective cohort study of adult female breast cancer patients found that GLP-1 receptor agonist use was associated with better all-cause survival and recurrence-free survival in patients with obesity or type 2 diabetes. The strongest associations were seen versus non-use in obesity and versus insulin or metformin in type 2 diabetes, while comparisons with SGLT2 inhibitors were less consistent and require further study.

12 May 2026