Center for Obesity and Metabolic Surgery

As the University Center for Obesity and Metabolic Surgery, we offer comprehensive and holistic care to patients suffering from severe overweight/obesity and related metabolic diseases.

Obesity has been recognized as a chronic nutritional and metabolic disease since 1997. The number of people affected has risen dramatically in recent decades, so much so that doctors are already talking about an epidemic. However, those affected still often feel that they are on their own with their illness. In order to better address the needs of patients with obesity and to give the issue the appropriate weight, the University Hospital Zurich has established the Zurich Obesity Center. This helps those affected to find out more about the topic and to find an individual treatment that promises lasting success. Here we have compiled everything you need to know about obesity and its treatment.

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Center for Obesity and Metabolic Surgery

University Hospital Zurich
Rämistrasse 100
8091 Zurich
Tel. +41 43 254 04 44

The abbreviation BMI stands for Body Mass Index. This index is calculated as the ratio of weight divided by height squared. This puts body weight in relation to body height. The result shows whether a person is of normal weight (BMI between 18 and 24.9 kg/m2), overweight (25-29.9 kg/m2) or obese (30 kg/m2 or more).

You can calculate your BMI here

Obesity or overweight is determined by measuring body weight divided by height squared. A person with a body mass index (BMI) of 25-29.9 kg/m2 is overweight, whereas a person with a BMI of 30 kg/m2 or higher is obese.

The term morbid obesity is used when the BMI is greater than or equal to 40 kg/m

Find out more about the clinical picture of obesity and its causes here:

To the obesity page

Overweight and obesity are both terms for increased body weight, but they differ in their severity and health effects.

Overweight, also known as preadiposity, refers to a body mass index (BMI) between 25.0 and 29.9. This is a moderately increased body weight, which can lead to health problems such as increased blood pressure, diabetes and joint problems.

Obesity is the medical term for morbid obesity. It starts from a BMI of 30.0 and is divided into three degrees of severity. Obesity is a more serious condition than simply being overweight and requires careful medical monitoring and treatment.

More information in the clinical picture

A weight in the range of BMI 25.0 to 29.9, which is medically referred to as “overweight”, is not treated surgically. Only in cases of severe overweight (“obesity”) are surgical interventions used to reduce weight. Depending on the type of procedure, either the stomach is reduced in size and/or the food is passed through part of the stomach and intestine. The most common surgical procedures are sleeve gastrectomy or Roux-en-Y gastric bypass. The gastric band, once the method of choice, is now only used in exceptional cases.

Whether surgery should be performed and which method is the most suitable is determined on an individual basis. Further information on the various surgical options for obesity can be found on our page on bariatric surgery.

The so-called “slimming injection” involves various medications that are injected to treat obesity. The active ingredients reduce the feeling of hunger and at the same time prolong the feeling of satiety. As a result, those affected eat less and lose weight. Originally, the two best-known active ingredients (liraglutide and semaglutide) were developed for the treatment of type 2 diabetes, as they lower blood glucose levels. They are now also approved for weight loss and are covered by health insurance for the treatment of obesity in certain cases.