Obesity surgery, also known as bariatric surgery, is a medical treatment designed for individuals with a high body mass index (BMI) who struggle to lose weight through traditional methods such as diet and exercise. These procedures help patients lose weight by either reducing the size of the stomach or limiting nutrient absorption.
Unlike cosmetic interventions, obesity surgery is performed for medical reasons and aims to prevent serious health risks such as diabetes, heart disease, and sleep apnea. Studies show that patients can lose up to 70–80% of their excess weight after the surgery. However, not every obese individual qualifies for bariatric surgery – specific medical criteria must be met.

Types of Obesity Surgery
There are several surgical methods used in bariatric treatment. The most common include:
Gastric Sleeve (Sleeve Gastrectomy): About 80% of the stomach is removed, leaving a small, tube-shaped stomach. Patients feel full faster and consume fewer calories.
Gastric Bypass: The stomach is reduced in size, and part of the small intestine is bypassed, limiting calorie absorption. This method often leads to faster weight loss but comes with a higher risk of nutrient deficiencies.
Duodenal Switch: Combines stomach reduction with intestinal bypass, offering significant weight loss results.
Adjustable Gastric Band: A band is placed around the upper stomach to control food intake.
How to Calculate Obesity – BMI Formula
Obesity is commonly measured using the Body Mass Index (BMI):
BMI = Weight (kg) / Height (m)²
👉 Example: A person who is 1.75 m tall and weighs 100 kg has a BMI of 32.65.
BMI Classification:
18.5 – 24.9: Normal weight
25 – 29.9: Overweight
30 – 34.9: Obesity (Class I)
35 – 39.9: Obesity (Class II)
40 and above: Morbid Obesity (Class III)
Common Symptoms of Obesity
Causes of Obesity
Obesity develops due to a combination of genetic, environmental, and lifestyle factors, such as:
Poor diet and overeating
Lack of physical activity
Genetic predisposition
Hormonal imbalances
Stress and psychological conditions
Who is Eligible for Obesity Surgery?
Obesity surgery is not suitable for everyone. Ideal candidates are:
Patients with a BMI of 40 or higher
Patients with a BMI of 35 or higher with related health issues (diabetes, hypertension, sleep apnea)
Individuals unable to lose weight through diet and exercise
Gastric Sleeve in Turkey Price
Among all bariatric procedures, gastric sleeve surgery in Turkey is one of the most preferred options for international patients. The cost of a gastric sleeve varies depending on the hospital, surgeon’s experience, and post-operative care included in the package. On average, gastric sleeve in Turkey price ranges between $2,000 and $4,500, which is significantly more affordable compared to the UK, USA, or other European countries. Despite the lower cost, patients still benefit from modern hospitals, experienced surgeons, and comprehensive aftercare programs, making Turkey a leading destination for obesity surgery.