Weight loss surgery, also called bariatric or metabolic surgery, is sometimes used as a treatment for people who are very obese.
It can lead to significant weight loss and help improve many obesity-related conditions, such as type 2 diabetes or high blood pressure.
But it's a major operation and in most cases should only be considered after trying to lose weight through a healthy diet and exercise.
NHS weight loss surgery
Weight loss surgery is available on the NHS if:
you have a body mass index (BMI) of 40 or more, or a BMI between 35 and 40 and an obesity-related condition that might improve if you lost weight (such as type 2 diabetes or high blood pressure)
you've tried all other weight loss methods, such as dieting and exercise, but have struggled to lose weight or keep it off
you agree to long-term follow-up after surgery – such as making healthy lifestyle changes and attending regular check-ups
Speak to a GP if you think weight loss surgery may be an option for you. If you qualify for NHS treatment, they can refer you for an assessment to check surgery is suitable.
You can also pay for surgery privately, although this can be expensive.
Weight loss surgery can achieve dramatic weight loss, but it's not a cure for obesity on its own.
You'll need to commit to making permanent lifestyle changes after surgery to avoid putting weight back on.
You'll need to:
change your diet – you'll be on a liquid or soft food diet in the weeks after surgery, but will gradually move onto a normal balanced diet that you need to stay on for life
exercise regularly – once you've recovered from surgery, you'll be advised to start an exercise plan and continue it for life
attend regular follow-up appointments to check how things are going after surgery and get advice or support if you need it
Women who have weight loss surgery will also usually need to avoid becoming pregnant during the first 12 to 18 months after surgery.