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.

Causes of Obesity and Overweight

Obesity, What Can be Done?

What is Body Mass Index (BMI)?

Obesity and Fast Food

Obesity and Exercise

Obesity Management

Obesity and Blood Pressure

Obesity and Diabetes

Obesity and Cancer

Obesity and Depression

Obesity and Autism

See more featured articles »

Obesity and Sleep

Obesity and Hormones

Obesity and Genetics

Obesity in Adults

Obesity in Pregnancy

Obesity and Infertility

Obesity and Sexual Health

Obesity and Stress

Obesity and Fractures

Obesity and Arthritis

Obesity and Metabolic Syndrome

Obesity Epidemiology

What is Obesity Paradox?

Obesity and Periodontitis

Obesity in Children

Obesity and Respiratory Disorders

Obesity and Heart Disease

Obesity and Anesthesia

Obesity and Skin Problems

Fat Mass and Obesity-Associated Gene (FTO)

What does Sleeve Gastrectomy Involve?

Dieting for Obese Children

Abdominal Obesity and the Metabolic Syndrome

Why is Visceral Fat Dangerous?

Latest Obesity News and Research

Disrupted body clocks raise risk of early death, study finds

A large cohort study from China and the U.S. shows that Circadian Syndrome (CircS)—a cluster of metabolic and behavioral disruptions—is linked to higher all-cause and cause-specific mortality. The risk increases with the number of CircS components, especially among adults aged 40–60.

29 Apr 2025

Gut bacteria and metabolites reveal depression-linked patterns in older adults

A cross-sectional study of 400 older adults with metabolic syndrome reveals that individuals with depression have distinct gut microbiota and metabolite profiles. Eight bacterial genera and 15 fecal metabolites were significantly associated with depression, suggesting a gut-brain axis link.

29 Apr 2025

Perceived stress linked to worsened symptoms in COPD patients

Increased perceived stress may cause worsened respiratory symptoms and decreased quality of life in people with chronic obstructive pulmonary disease (COPD), according to a new study.

29 Apr 2025

Phthalates linked to hundreds of thousands of global heart disease deaths

Daily exposure to certain chemicals used to make plastic household items could be linked to the more than 356,000 global deaths from heart disease that occurred in 2018 alone, a new analysis of population surveys shows.

29 Apr 2025

Pecans lower cholesterol and improve diet quality in at-risk adults, study finds

Substituting 57 grams of pecans for usual snacks over 12 weeks improved lipid profiles and diet quality but did not affect vascular function in adults at cardiometabolic risk. A modest weight gain was also observed.

29 Apr 2025

Global analysis ties plastic ingredient to soaring heart disease deaths

Daily exposure to certain chemicals used to make plastic household items could be linked to more than 356,000 global deaths from heart disease in 2018 alone, a new analysis of population surveys shows.

29 Apr 2025

Obesity changes how the gut responds to plant compounds, researchers report

Researchers found that the impact of polyphenols rutin and genistein on the human fecal metabolome varies significantly by body mass index (BMI). Lower BMI individuals showed more diverse metabolic responses, revealing how gut health and obesity could shape polyphenol metabolism.

28 Apr 2025

MASLD in children linked to increased mortality and chronic complications

Researchers from University of California San Diego have found that children diagnosed with metabolic dysfunction-associated steatotic liver disease (MASLD) are at significantly increased risk of premature death and serious long-term health complications.

28 Apr 2025

Study links ultraprocessed foods to higher risk of premature deaths, modeling shows

A study analyzing data from nationally representative dietary surveys and mortality data from eight countries (Australia, Brazil, Canada, Chile, Colombia, Mexico, United Kingdom, and United States) shows that premature deaths attributable to consumption of ultraprocessed foods (UPFs) increase significantly according to their share in individuals' total energy intake.

28 Apr 2025

Think only obese people get sleep apnea? Think again, says largest study yet

Researchers assess the prevalence of obesity and obstructive sleep apnea while also considering the role of age and sex in this relationship.

28 Apr 2025

Ultra-processed foods make up nearly half of US grocery purchases, raising public health concerns

A 2025 study of nearly 60,000 US households found that almost half of grocery purchases were ultra-processed foods (UPFs), with major disparities based on income, education, and race. Non-Hispanic white households led in UPF purchases, especially in beverages, reversing earlier trends.

28 Apr 2025

Prioritizing diabetes prevention through education and lifestyle changes

With American Diabetes Alert Day approaching on March 25, 2025, the Molly Diabetes Education and Management Center for Adults and Children urges individuals, especially those struggling with prediabetes and obesity, to prioritize diabetes prevention and treatment through education, nutritional counseling, and exercise.

25 Apr 2025

Research uncovers the cellular culprit behind age-related abdominal fat

It's no secret that our waistlines often expand in middle-age, but the problem isn't strictly cosmetic. Belly fat accelerates aging and slows down metabolism, increasing our risk for developing diabetes, heart problems and other chronic diseases.

25 Apr 2025

Early antibiotic use linked to higher childhood BMI

Taking antibiotics within the first two years of life is linked to a higher body mass index (BMI) in childhood, according to a new study. The research will be presented at the Pediatric Academic Societies (PAS) 2025 Meeting, held April 24-28 in Honolulu.

25 Apr 2025

What’s behind Gen Z’s skepticism about Ozempic and Wegovy

A U.S. study of over 500 youth aged 14–24 found high awareness but widespread hesitation about using semaglutide for weight loss. Concerns focused on safety, social stigma, and a preference for lifestyle changes like diet and exercise.

24 Apr 2025

Common diabetes drug can reduce the pain of people with knee osteoarthritis and obesity

A common diabetes drug can reduce the pain of people with knee osteoarthritis and overweight or obesity, possibly delaying the need for knee replacements, Monash University-led research has found.

24 Apr 2025

Maternal childhood trauma linked to rapid weight gain in baby boys

Adverse situations experienced by the mother during childhood – such as neglect or physical, psychological or sexual violence – can trigger excessive weight gain in male children as early as the first two months of life.

23 Apr 2025

Epigenetic flexibility helps embryos avoid developmental errors

An international research team led by Helmholtz Munich has, for the first time, provided a detailed insight into how the spatial organization of genetic material is established in the cell nucleus of early embryos within the first hours after fertilization.

23 Apr 2025

UK public backs food tax, if it makes healthy food more affordable

A nationally representative UK survey found that 48% of adults support taxing unhealthy foods, with support rising to 72% if revenues make healthy foods cheaper. Public backing was strongest among non-manual workers and Londoners, and weakest among lower-income and unemployed groups.

23 Apr 2025

Bacterial toxin may contribute to rise in early-onset colorectal cancer

In an effort to explain a modern medical mystery, an international team of researchers led by the University of California San Diego has identified a potential microbial culprit behind the alarming rise in early-onset colorectal cancer: a bacterial toxin called colibactin.

23 Apr 2025