Understand obesity treatment before choosing what comes next.
Independent, evidence-based guides to medical weight management, GLP-1 therapy, bariatric surgery, metabolic disease and long-term follow-up — written so a decision can be made with a specialist, not before one.
Explore treatments
Medication, bariatric surgery and the pathways between them.
Browse →Explore conditions
How treatment interacts with diabetes, sleep apnea, fatty liver and more.
Browse →Compare options
Side-by-side, evidence-based comparisons of the main pathways.
Browse →Ask a question
Direct answers to what patients search before treatment.
Browse →Operated by DYPHI Inc., a registered international patient facilitator in the Republic of Korea. NextWeight provides general education; diagnosis, prescribing, and treatment decisions are made by licensed medical institutions.
Start with the decision, not the procedure name.
You do not need to know the name of a treatment to begin. Start from where you are.
The comparisons patients search for most.
No option is automatically superior; suitability depends on individual assessment by a specialist.
GLP-1 vs bariatric surgery
Weight-loss magnitude, durability, metabolic effect and who each may suit.
Compare →Sleeve vs gastric bypass
Mechanism, expected weight loss, reflux, diabetes and reversibility.
Compare →Liposuction vs bariatric surgery
Why body contouring is not obesity treatment, and how they differ.
Compare →Obesity treatment may affect more than body weight.
Weight change can influence several obesity-related conditions. Effects vary by individual and by treatment, and any change should be monitored by the clinicians managing each condition.
Type 2 diabetes
Weight loss and metabolic surgery may improve glycaemic control, and can lead to remission in some selected patients. Read the evidence →
GERD after sleeve
Why reflux can appear or worsen after sleeve gastrectomy, and what the options are. Read more →
Weight regain
Why weight can return after medication or surgery, and when revision is considered. Read more →
Obstructive sleep apnea
Weight reduction may reduce the severity of sleep apnea for some people, but treatment such as CPAP is decided by a sleep specialist.
Fatty liver disease
Weight loss is associated with improvement in metabolic-associated fatty liver disease in many patients, though evidence and response vary.
Joint & mobility limitations
Reducing weight may ease load-related joint pain and improve mobility for some patients, alongside appropriate physiotherapy or orthopaedic care.
Questions patients ask before treatment.
Direct, evidence-based answers — with the qualification that your individual situation needs a specialist.
What the published evidence shows.
Three figures patients most often weigh when comparing surgery with medication. Each reflects a specific study population and time point, and does not predict what will happen for any individual.
Mean total weight loss with bariatric surgery
Source: JAMA Surgery, 2025 cohort study.
Mean total weight loss with GLP-1 receptor agonists
Source: JAMA Surgery, 2025 cohort study.
Of weight loss regained after stopping semaglutide
Source: STEP 1 trial extension.
These are population-level results reported in cited studies. They summarise averages across groups and do not establish what any individual will experience; effectiveness, risks, and durability depend on personal medical circumstances assessed by a specialist. See what the evidence shows
A nationally organised bariatric surgery system with published registry data.
Korea combines KSMBS surgeon accreditation, electronic registry reporting, multidisciplinary hospital care, and clinical experience with obesity-related metabolic disease in Asian populations.
Patients included in the 2019–2022 KSMBS report
Participating institutions
Recorded deaths during the four-year registry period
Registry findings do not guarantee individual outcomes. Hospital, surgeon, procedure, and patient risk must be evaluated separately.
Considering medical treatment in Korea?
NextWeight provides general, evidence-based educational information. For individual hospital coordination and international-patient support in Korea, continue to Kordy.
Continue with Kordy