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 Sexual Health

What is Obesity Paradox?

Obesity and Autism

Obesity and Anesthesia

Obesity and Exercise

Obesity Epidemiology

Obesity and Hormones

Obesity and Depression

Why is Visceral Fat Dangerous?

Obesity and Cancer

Abdominal Obesity and the Metabolic Syndrome

See more featured articles »

Obesity in Adults

Obesity and Skin Problems

Causes of Obesity and Overweight

Obesity and Periodontitis

Fat Mass and Obesity-Associated Gene (FTO)

What does Sleeve Gastrectomy Involve?

Obesity and Fast Food

Obesity Management

Obesity and Genetics

Obesity in Children

Obesity and Arthritis

Obesity and Fractures

Obesity in Pregnancy

Obesity and Respiratory Disorders

Obesity and Heart Disease

Dieting for Obese Children

What is Body Mass Index (BMI)?

Obesity and Sleep

Obesity and Infertility

Obesity and Metabolic Syndrome

Obesity and Blood Pressure

Obesity, What Can be Done?

Obesity and Diabetes

Obesity and Stress

Latest Obesity News and Research

Women using GLP-1 drugs face higher weight loss stigma

In a new study exploring stigma associated with the use of GLP-1 drugs for weight loss, women who lost weight using GLP-1 medications were judged more harshly than those who lost weight through diet and exercise, with negative reactions driven largely by beliefs that medication-assisted weight loss is a "shortcut."

17 Apr 2026

Obesity, GLP-1s, and metabolic care

An interview with Professor Thomas Forst, Chief Medical Officer, hVIVO

From hVIVO 17 Apr 2026

A single sauna session boosts immune cells within minutes

New research shows Finnish sauna sessions rapidly mobilize immune cells, revealing heat stress effects on cytokines and potential health benefits.

17 Apr 2026

Ultra-processed diets may harm muscle health

Ultra-processed food diets may impair muscle health, with MRI findings showing increased fat infiltration in individuals at risk for knee osteoarthritis.

17 Apr 2026

Researchers debunk the existence of the childhood "adiposity rebound" phenomenon

In new research to be presented at this year's European Congress on Obesity in Istanbul, Turkey (12-15 May) and published in The Journal of Nutrition, a 42-year old theory as to why children's body mass index (BMI) decreases post-infancy before then rising continuously from age six years –'the adiposity rebound' is refuted using new analyses – rather than decreasing body fat, the real reason is proposed as increasing muscle mass.

17 Apr 2026

Scientists discover how the immune system signals the brain to avoid germs

Researchers from the University of Bonn and University Hospital Bonn uncover vital mechanism for survival

16 Apr 2026

BMI increases in early childhood may reflect muscle growth, not fat

A new study published in The Journal of Nutrition, a peer-reviewed journal of the American Society for Nutrition, offers new insights into a decades-old puzzle in childhood obesity. The study found that while body mass index (BMI) starts to rise in early childhood during a stage known as adiposity rebound, when BMI increases after an initial decline, the waist-to-height ratio, a measure that better reflects body fat, continues to drop. This suggests that the BMI increase at this age mainly reflects growth in lean tissues such as muscle and bone, rather than extra body fat.

16 Apr 2026

Study links ultra-processed food intake to poorer thigh muscle quality

A Radiology study of 615 adults at risk for knee osteoarthritis found that higher ultra-processed food intake was associated with greater fat infiltration in thigh muscles on MRI, a marker of poorer muscle quality. The association remained after adjustment for BMI, was stronger in models using abdominal circumference, and did not differ significantly by sex.

15 Apr 2026

Lower-protein toddler formula does not reduce BMI at age 2, trial finds

A large randomized trial in Germany and Spain found that lowering milk protein intake during the second year of life did not reduce BMI z-score at 24 months, though it did produce a temporary BMI reduction at 18 months. Lower protein intake also led to more stable weight and length trajectories, while higher protein intake pushed growth upward relative to WHO standards.

15 Apr 2026

Ultra-processed foods linked to higher obesity risk in adolescents

Adolescents who consume more ultra-processed foods (UPFs) have significantly higher odds of being overweight or obese, according to a new systematic review and meta-analysis published in the open-access journal PLOS One by Mekuriaw Nibret Aweke of the University of Gondar, Ethiopia, and colleagues.

15 Apr 2026

Gut-liver changes drive foodborne infection severity in fatty liver disease

A research team led by the University of California, Irvine's Joe C. Wen School of Population & Public Health has uncovered a critical biological link explaining why individuals with metabolic dysfunction–associated steatotic liver disease (MASLD), or fatty liver disease, face significantly worse outcomes from certain foodborne infections.

15 Apr 2026

Matching exercise timing to body clock chronotype improves heart health

Timing exercise to match body clock chronotype-the natural predisposition to morning or evening alertness-may lower cardiovascular disease risk among those who are already vulnerable, suggests research published in the open access journal Open Heart.

15 Apr 2026

Semaglutide improves liver function independently of weight loss

Researchers at Toronto's Sinai Health have found that semaglutide – the active ingredient in popular weight loss drugs that mimic the gut hormone GLP-1 – acts directly on a subset of liver cells to improve organ function and does so independently of weight loss.

15 Apr 2026

Liver cancer burden rising globally amid shift to metabolic risks

Primary liver cancer continues to pose a major global health challenge, ranking as the third leading cause of cancer-related deaths worldwide.

15 Apr 2026

Calorie labels on menus may benefit people with binge eating disorders

Food calorie labels on menus in cafes and restaurants can be helpful for people with binge eating disorders, even aiding their recovery, finds new research from UCL and King's College London.

15 Apr 2026

Loneliness is linked to higher risk of degenerative heart valve disease

Adults who reported feeling lonely had a higher risk of developing degenerative heart valve disease, even after accounting for traditional heart disease risk factors and genetics, according to new research published today in the Journal of the American Heart Association, an open-access, peer-reviewed journal of the American Heart Association.

15 Apr 2026

“Natural” and “healthy” labels may confuse shoppers more than help

Study reveals that front-of-pack labels alone can't ensure healthy choices, as perceptions of naturalness and processing shape consumer behavior.

15 Apr 2026

Gaining weight before age 30 tied to higher mortality

The study reveals that weight gain before 30 years is associated with increased mortality risk, underscoring the need for early obesity intervention strategies.

15 Apr 2026

Metabolic syndrome doubles worldwide over two decades

A global study reveals a sharp rise in metabolic syndrome prevalence from 2000 to 2023, highlighting urgent public health challenges and regional disparities.

15 Apr 2026

Waist-to-height ratio outperforms BMI in predicting hypertension risk

New waist-to-height cut-offs to assess fat mass and obesity predicted the risk of hypertension better than body mass index, according to a new study from the University of Eastern Finland and the Robert Wood Johnson Medical School at Rutgers University in the US.

14 Apr 2026