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This week, Dr. Bikman’s lecture focuses on metabolic surgeries (also called bariatric surgeries), their mechanisms, and their impacts on weight loss and metabolic health.

Ben begins by explaining the qualifications for these surgeries, which often serve as a last resort for individuals with severe obesity or comorbidities like type 2 diabetes. Common qualifications include a BMI of 40 or higher, or lower BMIs with conditions like hypertension or diabetes. These surgeries aim to address obesity and related health complications when traditional methods, like diet and exercise, fail.

Dr. Bikman describes four primary types of metabolic surgeries: Roux-en-Y gastric bypass, sleeve gastrectomy, biliopancreatic diversion with duodenal switch, and adjustable gastric banding. He explains their procedures, including how they alter digestion, absorption, and stomach size, leading to weight loss through restriction and malabsorption. These surgeries also bring significant hormonal changes, such as increases in GLP-1 and reductions in ghrelin (hunger hormone), contributing to satiety and metabolic improvements.

While these surgeries can dramatically improve insulin sensitivity, reduce glucagon levels, and improve conditions like type 2 diabetes, they come with risks. Nutrient deficiencies, surgical complications, dumping syndrome, and weight regain are significant concerns. Younger patients are particularly prone to weight regain, especially if they don’t adopt sustainable eating habits. Dr. Bikman emphasizes the need for education on managing macronutrients and maintaining long-term behavioral changes.

Ben concludes that metabolic surgeries can be a valuable tool for those with severe obesity and related complications. However, he warns of their limitations and advocates for coupling them with lifestyle changes to optimize long-term success.

Show Notes/References:

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Metabolic Surgeries: How Bariatric Procedures Work, Their Benefits and Risks

The Metabolic Classroom with Dr. Ben Bikman