Reaching and Maintaining a Healthy Weight

Weight-Loss Treatments

There are several medical approaches to weight loss, including prescription medications and surgical procedures. These interventions are typically considered for individuals who have not achieved significant weight loss through lifestyle changes alone, or who have obesity-related health conditions.

Weight-Loss Medications

Overview of Prescription Medications

The FDA (Food and Drug Administration) can both regulate and authorize prescription medications for weight loss. These medications are generally prescribed for individuals with a BMI ≥ 30, or ≥ 27 with obesity-related conditions.

• Alli (orlistat): Works by blocking the enzyme lipase, reducing fat absorption in the intestines.

• Belviq (lorcaserin): A serotonin receptor agonist that helps control appetite.

• GLP-1 Drugs: Mimic the action of glucagon-like peptide-1, a hormone that regulates appetite and insulin.

Example Application

In 2009, Mark was approved for weight-loss medication because of his obesity. After 8 years and losing over 200 pounds, his overall health outcomes have improved immensely. Based on this information, the following are true:

• He was most likely prescribed an FDA-controlled medication.

• He could have been prescribed medication that inhibits fat absorption or suppresses appetite.

• He was not prescribed an SSRI (Selective Serotonin Reuptake Inhibitor) such as Prozac, which is not a weight-loss medication.

Key Points about Weight-Loss Medications

• Medications are typically prescribed when lifestyle changes alone are insufficient.

• They work by reducing appetite, increasing satiety, or decreasing fat absorption.

• Potential side effects and long-term safety must be considered.

Weight-Loss Surgeries

Overview of Surgical Procedures

Weight-loss (bariatric) surgery may be recommended for individuals with Class 3 obesity (BMI ≥ 40) or those with significant obesity-related disorders. Surgery is considered when other methods have failed and the health risks of obesity are severe.

• Sleeve Gastrectomy: Reduces stomach size, limiting food intake and decreasing hunger hormones.

• Gastric Bypass: Both restricts food intake and reduces calorie absorption.

• Gastric Banding: Adjustable band creates a small stomach pouch, limiting food intake.

• Bariatric Arterial Embolization: Minimally invasive; targets hormone production to reduce appetite.

Key Points about Weight-Loss Surgery

• Recommended for severe obesity or when other treatments have failed.

• Can result in significant and sustained weight loss.

• May improve or resolve obesity-related conditions such as Type 2 Diabetes.

• Risks include surgical complications, nutritional deficiencies, and the need for lifelong dietary changes.

Example Application

• The hunger hormone ghrelin is primarily produced in the stomach. Procedures like sleeve gastrectomy reduce ghrelin production, decreasing appetite.

• Weight-loss surgery can mitigate the effects of Type 2 Diabetes by improving insulin sensitivity and reducing body weight.

Summary Table: Comparison of Weight-Loss Treatments

Additional info: The notes infer that both medications and surgery are used when lifestyle interventions are insufficient, and that both approaches require medical supervision and ongoing lifestyle management for long-term success.