Bariatric Surgery

Bariatric surgery is an option for people who are severely obese and cannot lose weight by traditional means or who suffer from serious obesity-related health problems. The operation promotes weight loss and reduces the risk of type 2 diabetes by restricting food intake.

What is Bariatric Surgery?

Exercise and diet alone often fails to effectively treat people with extreme and excessive obesity. Bariatric surgery is an operation that is performed in order to help such individuals lose weight. Evidence suggests that bariatric surgery may lower death rates for patients with severe obesity, especially when coupled with healthy eating and lifestyle changes after surgery.

Taste Changes Following Bariatric Surgery

Weight Loss After Bariatric Surgery

Bariatric Surgery Research

Diet After Bariatric Surgery

Bariatric Surgery Side Effects

Bariatric Surgery Types

Metabolic Syndrome and Bariatric Surgery

Latest Bariatric Surgery News and Research

Why you still want dessert even when you're completely full

A 2026 narrative review examines how food liking (pleasure) and wanting (motivation) interact with hunger and satiety to influence food choices, explaining why certain foods may remain appealing even after a satisfying meal. The authors report that food reward can change independently of hunger under specific conditions, but evidence remains limited that these changes reliably predict subsequent eating or improve weight-management outcomes.

1 Nov 2026

Thyroid cancer risks and medication timing with oral GLP-1s

Like most prescriptions, glucagon-like peptide 1 (GLP-1) medications to manage weight come with potential risks.

28 Oct 2026

Low vitamin B12 is linked to heart disease. Supplements tell a different story

A narrative review published in Nutrition Journal examines how vitamin B12 deficiency may contribute to cardiovascular disease through elevated homocysteine, endothelial dysfunction, oxidative stress and altered methylation. The authors found that B12 supplementation has not consistently prevented heart attacks or cardiovascular deaths in clinical trials, although combined B-vitamin therapy may modestly reduce stroke risk, particularly in populations without folic acid fortification.

27 Oct 2026

CT scans linked vitamin D levels to fat within muscles after bariatric surgery

Researchers followed 113 adults for one year after bariatric surgery and found that those with higher postoperative vitamin D concentrations had less fat infiltration within certain muscles and lower visceral adiposity. They found no significant association between increases in vitamin D and changes in body composition after correction for multiple comparisons, while preoperative vitamin D levels did not independently predict postoperative body composition.

27 Oct 2026

Endometrial cancer rates rise sharply among younger South Texas women

An Upper-South region of Texas including San Antonio and Bexar County had the state's highest hysterectomy-corrected incidence of endometrial cancer and the largest increase over time, a study led by scientists at The University of Texas at San Antonio Health Science Center and the National Cancer Institute showed.

27 Oct 2026

Obesity impairs key immune cells but bariatric surgery reverses damage

New Maynooth University (MU) research led by the Department of Biology's Dr Ciara Flynn, working within the research group of Prof Andrew Hogan at the Kathleen Lonsdale Institute for Human Health Research has found that obesity can impair key immune cells that help protect the body against infection and cancer.

22 Oct 2026

Could this flowering plant help people lose body fat?

Lythrum salicaria extract supplementation led to body fat reduction in a clinical trial, suggesting a promising plant-based approach to weight management.

19 Oct 2026

Doctors avoided two common words when talking about weight with patients

Researchers analyzed 123 recorded primary care consultations involving adults with type 2 diabetes and elevated BMI, finding that weight was discussed in just 39% of visits. Clinicians avoided potentially stigmatizing terms such as "overweight" and "obesity," while weight-related conversations occurred more frequently among patients taking GLP-1 receptor agonists.

13 Oct 2026

Three months of yoga before surgery revealed a surprising difference in stress hormones

In a non-randomized study of 40 adults with severe obesity awaiting bariatric surgery, researchers found significantly lower plasma noradrenaline levels in yoga participants than in controls after adjusting for baseline measurements. The researchers detected no significant DNA methylation changes in three inflammatory genes and found no clear psychological or metabolic benefits.

12 Oct 2026

Diet drinks showed no clear weight-loss edge over water after two years

In a two-year randomized trial combining assisted weight management with an unassisted follow-up year, completers maintained average weight losses of 4.8 kg with diet drinks and 3.7 kg with water. Researchers found no significant difference between groups, but fewer than half of the 493 participants completed follow-up.

11 Oct 2026

New iron deficiency guidelines raise key blood test cutoffs

ASH 2026 guidelines redefine iron deficiency diagnosis with higher ferritin thresholds, aiming for better detection and management across diverse populations.

9 Oct 2026

Bariatric surgery restores menstrual cycles and reduces polycystic ovaries in obese women

Metabolic bariatric surgery improves menstrual cycle frequency and symptoms of polycystic ovaries in women living with obesity, a new study from the University of Surrey reports.

7 Sep 2026

The obesity-microbiome story is more complicated than ‘good’ and ‘bad’ bacteria

This review finds that obesity is linked to reciprocal interactions between diet, the gut microbiome, microbial metabolites, and host metabolic pathways that influence appetite, insulin sensitivity, inflammation, and energy balance across the lifespan. It highlights diet as a particularly tractable way to influence this system, while emphasizing that microbiome changes associated with GLP-1 therapies remain difficult to separate from weight loss and that functional multi-omics approaches may help enable more personalized interventions.

3 Sep 2026

Semaglutide did more than cut weight in this analysis of 6,239 adults

A systematic review and meta-analysis of nine randomized controlled trials involving 6,239 adults with overweight or obesity without diabetes found that subcutaneous semaglutide produced substantially greater reductions in body weight, waist circumference, and C-reactive protein than placebo. The higher dose of 7.2 mg semaglutide showed potential for greater weight loss, although the evidence is largely based on a single trial and requires confirmation.

31 Aug 2026

GLP-1 drugs may reshape obesity care, but clinicians still have questions

Interviews with 11 healthcare professionals in a UK specialist weight management service found generally positive attitudes toward injectable GLP-1 drugs, alongside limited formal training and uncertainty about how the medications should be integrated with behavioral care. Participants anticipated potential benefits for confidence and weight management but also raised concerns about treatment discontinuation, behavioral engagement, and evolving professional responsibilities.

26 Aug 2026

New review links obesity with accelerated biological aging mechanisms

The global rise in obesity and population aging represents a major public health challenge, with growing evidence suggesting that excess body fat not only increases the risk of chronic disease but may also accelerate the biological aging process.

6 Aug 2026

Researchers propose new framework to define clinical obesity

A new approach to defining obesity could help physicians better determine which patients need more intensive treatment by focusing on the effects of excess adiposity on organs and tissues rather than relying primarily on whether a person meets a set of metabolic risk thresholds.

31 Jul 2026

Diet helps people lose weight regardless of genetic obesity risk

A study reveals dietary coaching aids weight loss equally in individuals with high and low genetic obesity risk, challenging genetic determinism in weight loss.

17 Jul 2026

GLP-1 weight loss may reduce first-impression penalties in relationships and hiring

An NBER working paper found that GLP-1 initiation and associated weight loss were followed by higher partnership formation among initially single women and greater employment entry among women who were not employed. The findings suggest that part of the female obesity penalty may arise when prospective partners and employers form first impressions, although the observational analysis did not directly prove discrimination

13 Jul 2026

Study: Bariatric surgery is safe, effective for obese adolescents and young adults

A new study from researchers at LSU's Pennington Biomedical Research Center, FMOL Health | Our Lady of the Lake Regional Medical Center and Metamor Institute demonstrates that metabolic and bariatric surgery can be delivered safely and effectively for adolescents and young adults living with severe obesity, offering promising improvements in weight loss and obesity-related health conditions.

13 Jul 2026