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.

here are several types of weight loss surgery.

The most common types are:

• gastric band – a band is placed around the stomach, so you don't need to eat as much to feel full
• gastric bypass – the top part of the stomach is joined to the small intestine, so you feel fuller sooner and don't absorb as many calories from food
• sleeve gastrectomy – some of the stomach is removed, so you can't eat as much as you could before and you'll feel full sooner.