Bariatric surgery, also known as weight loss surgery, is a life-changing option for all who are struggling with obesity. It is often recommended when traditional methods like diet and exercises fail to achieve desired results or when obesity-related health complications arise, such as diabetes type 2, high cholesterol, high tension, problems in the bones, sleep apnoea and more. Before considering bariatric surgery, it’s crucial to collect as much information as possible to make an informed decision. Not everyone is a suitable candidate, and understanding the potential outcomes is essential. Let’s explore how much weight you can expect to lose after undergoing a bariatric surgery, such as Gastric Sleeve or Gastric Bypass.

Obese young Woman in Psychotherapy Session

How much weight can you expect to lose after bariatric surgery?

The amount of weight you can expect to lose after bariatric surgery depends on several factors:

1. Type of Surgery:
The choice of bariatric procedure plays a significant role in determining weight loss outcomes. Common options include adjustable gastric banding, gastric sleeve, and gastric bypass.

2. Your Starting Weight:
Your initial weight and body composition are crucial factors. The greater the excess weight, the more potential there is for significant weight loss.

3. Overall Health:
Your general health and any obesity-related comorbidities can influence the surgery’s success and the amount of weight you can lose.

4. Motivation and Lifestyle:
Your commitment to making long-term lifestyle changes, including dietary modifications and regular exercise, significantly impacts your weight loss journey.

5. Follow-Up Care:
Adhering to your doctor’s recommendations, attending post-operative appointments, and seeking ongoing support are crucial for success.

Closeup of young woman loosing weight measuring her waist. Concept of dieting, unhealthy lifestyle, overweight and obesity

Which Bariatric Surgery Loses The Most Weight?

On average, patients who undergo bariatric surgery can expect to lose a substantial amount of weight. Weight loss typically ranges from 40% to 80% of excess weight. To illustrate, let’s consider a hypothetical scenario:

Imagine a patient who is 6 feet 2 inches tall, weighs 400 pounds, and has an ideal weight of 195 pounds. This patient aims to lose 205 pounds of excess weight.

1. Adjustable Gastric Band:
With this procedure, the patient may lose approximately 40-50% of their excess weight, which translates to 80-102 pounds.

2. Gastric Sleeve:
Opting for a gastric sleeve surgery can result in a weight loss of about 60-65%, equivalent to approximately 120 pounds.

3. Gastric Bypass:
A gastric bypass procedure can lead to substantial weight loss of 75-80%, amounting to around 160 pounds.

It’s essential to note that these are rough estimates, and individual results may vary. The pace of weight loss is typically highest in the first few months after surgery and continues for 12-18 months post-surgery. Sustainable results depend on various factors, including your commitment to a healthy lifestyle and ongoing medical support.

Concept of weight loss with slim girl, isolated on white backgro


Bariatric surgery is a transformative option for individuals struggling with obesity and related health issues. The amount of weight you can expect to lose after surgery varies based on factors such as the type of procedure, your starting weight, overall health, motivation, and follow-up care. While these surgeries offer promising results, they are not a quick fix; they require a long-term commitment to lifestyle changes.

Surgical weight loss programs encompass a comprehensive approach that includes pre-operative preparation, post-operative care, tailored exercise routines, nutritional guidance, and support groups. This holistic approach is designed to ensure not only significant weight loss but also improved overall health and quality of life, potentially adding years to your life. Before embarking on this journey, consult with a healthcare professional to determine if bariatric surgery is the right choice for you and to set realistic expectations for your weight loss goals.

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