This is a decision that deserves careful thought, and it's one where a lot of what you'll read online is either overly promotional or unhelpfully discouraging. Here is a straight account.
This matters, because it shapes everything else. Obesity is a complex, chronic condition influenced by genetics, hormones, metabolism and environment. For people with severe obesity, the body actively defends its higher weight — which is precisely why diet and exercise alone so often fail to produce lasting results, no matter how much effort goes in.
Bariatric surgery works by changing that underlying biology, not by simply forcing you to eat less through willpower.
Eligibility is based on Body Mass Index (BMI) alongside any obesity-related conditions. Broadly, surgery is considered for adults with:
International guidelines from the ASMBS and IFSO specifically recognise that BMI thresholds should be lower for people of Asian origin, because metabolic risk appears at a lower body weight in Asian populations. In these guidelines, a BMI above 25 suggests clinical obesity, and surgery may be considered from a BMI of around 27.5 in appropriately selected patients.
This is genuinely relevant here, and it's why a number that looks "not high enough" by older Western criteria may still warrant a proper assessment.
No responsible surgeon offers bariatric surgery on a number alone. A full assessment considers your other medical conditions, your fitness for anaesthesia, your understanding of what surgery involves, and your readiness for permanent change. This usually involves a team — surgeon, dietitian, physician, anaesthetist, and sometimes a psychologist.
There is no single "best" operation. The right choice depends on your weight, your other conditions (especially diabetes and reflux), your eating patterns, and your preferences — decided together after full discussion.
This is the part that deserves more emphasis than it usually gets. Surgery is a powerful tool, but it is not a shortcut and not a cure. It works only alongside:
Skipping vitamins is genuinely dangerous and can cause serious, sometimes permanent, deficiency problems. If you're not prepared for that commitment, surgery is not the right step — and that's a legitimate conclusion to reach.
Bariatric surgery can produce substantial, sustained weight loss and major improvements in conditions such as type 2 diabetes, blood pressure and sleep apnoea. But results vary considerably between individuals and depend heavily on how closely the eating, activity and follow-up plan is followed. Anyone promising you a specific number is overselling.
Weight-loss surgery is a legitimate, effective medical treatment for a genuine medical condition — not a cosmetic procedure and not an easy option. If your weight is affecting your health and other approaches haven't worked, it's worth an honest assessment.
Come to a consultation prepared to discuss your health, your history, and your readiness. You'll get a realistic view of whether surgery would help you — including if the answer is no. The free Weight-Loss Surgery handbook covers the operations and life afterwards in detail.
This article is for general patient education only and does not constitute medical advice, diagnosis or treatment. Individual circumstances, eligibility, risks and recovery vary — please consult a qualified medical professional for advice specific to your condition.