Which of the following statements is true about the gastric bypass procedure? 

• A. A gastric bypass may result in malabsorption of nutrients.  
• B. A gastric bypass allows for quicker absorption of all nutrients.  
• C. A gastric bypass increases the efficiency in the absorption of nutrients.  
• D. A gastric bypass reroutes the stomach to the duodenum.  

Answer: (A)

Verified step by step guidance

1. Step 1: Understand what a gastric bypass procedure involves. It is a type of bariatric surgery designed to help with weight loss by altering the digestive system.
2. Step 2: Recognize that in a gastric bypass, the stomach is divided into a small upper pouch and a larger lower remnant pouch, and the small intestine is rearranged to connect to both.
3. Step 3: Know that this surgery reduces the size of the stomach and bypasses a portion of the small intestine, which leads to decreased nutrient absorption.
4. Step 4: Analyze the statements: since part of the small intestine is bypassed, nutrient absorption is reduced, not increased or quicker.
5. Step 5: Conclude that the true statement is that a gastric bypass may result in malabsorption of nutrients due to the rerouting and bypassing of parts of the digestive tract.