Comparing Gastric Bypass and Gastric Sleeve: Dr. Niruben Rajasagaram Explains the Differences

WANTIRNA, Australia - Oct. 15, 2025 - PRLog -- As more individuals across Melbourne consider surgical options for sustainable weight loss, the need for expert medical guidance continues to grow. Bariatric specialist Dr. Niruben Rajasagaram provides clear insights into two of the most commonly performed weight loss procedures: gastric sleeve surgery and laparoscopic gastric bypass surgery.

What is Gastric Sleeve Surgery?
Gastric sleeve surgery, also known as sleeve gastrectomy, involves removing a portion of the stomach to create a smaller, tube-shaped stomach, or "sleeve." This limits food intake and reduces hunger by lowering the levels of ghrelin, the hormone that stimulates appetite.
Gastric sleeve surgery in Melbourne has become increasingly popular and is the most common weight loss surgery to date, due to its straightforward procedure and proven long-term effectiveness.

What is Gastric Bypass Surgery?
Laparoscopic gastric bypass surgery, which comprises the Roux-en-Y gastric bypass or the single loop (mini gastric) bypass, is a more advanced procedure in which the stomach is divided into a small pouch and connected directly to the small intestine. This bypasses most of the stomach and part of the small bowel, limiting food intake while also altering the way calories and nutrients are absorbed.

Key Differences Explained by Dr. Rajasagaram
Below, Dr. Rajasagaram outlines the important differences between the two surgeries:

• Weight Loss Outcomes: Both surgeries are effective for long-term weight loss. However, gastric bypass typically results in slightly more weight loss over the long term.
• Procedure Complexity: Gastric sleeve is simpler and has a shorter surgery and recovery time. Gastric bypass is more complex and involves altering the digestive tract, as well as potential complications you would not see with the gastric sleeve.
• Nutritional Considerations: Gastric bypass patients are more susceptible to developing nutrient deficiencies and will need lifelong supplements. Gastric sleeve patients also require supplements, but generally, the risks are less. However, adherence to the guidelines provided will prevent a patient from developing this.
• Diabetes and Reflux Management: Bypass is more evidence in support of resolving type 2 diabetes and GERD (Roux-en-Y gastric bypass), while the gastric sleeve may not be suitable for those with severe reflux.

Why choose Dr. Niruben Rajasagaram for any type of weight loss surgery
Dr. Niruben Rajasagaram is a highly regarded Melbourne-based bariatric and gastrointestinal surgeon with extensive experience in gastric sleeve and laparoscopic gastric bypass procedures.

For more information about gastric sleeve surgery in Melbourne or other gastric bypass surgery, visit https://www.nirubenrajasagaram.au/ or call our weight loss centre.