CBC Nutritional Science for Bariatrics 2 — Questions and Answers
Question 1: After a Roux-en-Y gastric bypass, which vitamin deficiency is most likely because its absorption depends on intrinsic factor and the bypassed duodenum?
- Vitamin C
- Vitamin B12 (Correct answer)
- Vitamin K
- Niacin
Correct answer: Vitamin B12
B12 requires intrinsic factor and the bypassed portions of the stomach and duodenum, so deficiency is common after RYGB.
Question 2: What is the recommended minimum daily protein intake commonly advised for most post-bariatric patients?
- 20-30 g
- 40-50 g
- 60-80 g (Correct answer)
- 120-150 g
Correct answer: 60-80 g
Guidelines typically recommend 60-80 g of protein daily to preserve lean mass after surgery.
Question 3: Which mineral deficiency after bariatric surgery is a leading cause of anemia, especially in menstruating women?
- Iron (Correct answer)
- Zinc
- Selenium
- Magnesium
Correct answer: Iron
Reduced acid and duodenal bypass impair iron absorption, making iron-deficiency anemia common.
Question 4: Why are chewable or liquid vitamin supplements often preferred in the early postoperative period?
- They taste better
- They are cheaper
- They dissolve and absorb more reliably in the smaller stomach (Correct answer)
- They contain more calories
Correct answer: They dissolve and absorb more reliably in the smaller stomach
Chewable and liquid forms dissolve more readily and absorb better while the stomach pouch heals.
Question 5: Dumping syndrome after gastric bypass is most commonly triggered by which type of food?
- High-fiber vegetables
- Lean protein
- Simple sugars and refined carbohydrates (Correct answer)
- Water between meals
Correct answer: Simple sugars and refined carbohydrates
Rapid entry of simple sugars into the small intestine causes fluid shifts and dumping symptoms.
Question 6: Which fat-soluble vitamins require monitoring particularly after malabsorptive procedures like biliopancreatic diversion?
- Vitamins A, D, E, and K (Correct answer)
- Vitamins B1, B6, B12
- Vitamin C only
- Folate and niacin
Correct answer: Vitamins A, D, E, and K
Fat malabsorption reduces uptake of the fat-soluble vitamins A, D, E, and K.
Question 7: What hydration guidance is typically given to bariatric patients regarding fluids and meals?
- Drink large amounts during meals
- Avoid fluids for 30 minutes before and after meals (Correct answer)
- Only drink carbonated beverages
- Limit total daily fluids to 500 mL
Correct answer: Avoid fluids for 30 minutes before and after meals
Separating fluids from meals prevents overfilling the pouch and reduces early satiety loss and dumping.
CBC Nutritional Science for Bariatrics 2
After a Roux-en-Y gastric bypass, which vitamin deficiency is most likely because its absorption depends on intrinsic factor and the bypassed duodenum?