In Roux-en-Y Gastric Bypass (RYGB), what effect does altering the GI tract have on nutrient absorption?

In Roux-en-Y Gastric Bypass (RYGB), the surgical alteration of the gastrointestinal (GI) tract creates a small pouch that limits food intake and bypasses a portion of the small intestine. This particular approach significantly impacts nutrient absorption by permanently altering the digestive process.

The procedure reduces the functional length of the small intestine, which is primarily responsible for absorbing nutrients. By bypassing the duodenum and a section of the jejunum, patients may experience malabsorption of vital nutrients, including vitamins and minerals. For instance, the absorption of fat-soluble vitamins (A, D, E, and K) and essential minerals such as calcium and iron is often compromised.

Furthermore, the changes in the GI tract can lead to changes in hormonal responses that also influence how the body processes and absorbs nutrients. These effects contribute to the potential for nutritional deficiencies, which is why lifelong dietary monitoring and supplementation are commonly recommended after the surgery.

Overall, the permanent alteration of the GI tract through Roux-en-Y Gastric Bypass indeed leads to malabsorption, making this choice the correct response.