Why do people with chronic pancreatitis lose weight even when appetite and eating habits are normal?

Why do people with chronic pancreatitis lose weight even when appetite and eating habits are normal?

• A. Body not secreting enough pancreatic enzymes to digest food, so nutrients are not absorbed
• B. Increased activity
• C. High fiber diet
• D. Dehydration

Answer: (A)

Chronic pancreatitis often causes exocrine pancreatic insufficiency, meaning the pancreas doesn’t secrete enough digestive enzymes, especially lipase, to properly break down fats, proteins, and carbohydrates. When fat digestion is impaired, fats aren’t absorbed and pass out in the stool, leading to fat malabsorption (steatorrhea). Since fat is highly calorically dense, losing it in the urine and stool reduces overall calorie absorption, so a person can lose weight even if their appetite and eating habits are normal. This malabsorption also explains possible deficiencies in fat-soluble vitamins. The other options don’t fit the situation: simply having increased activity would raise energy use but doesn’t address the failure to digest and absorb nutrients; a high-fiber diet can affect digestion but doesn’t cause the specific malabsorption seen with pancreatic enzyme deficiency; dehydration can cause temporary weight loss but not the steady, digestion-based weight loss seen in chronic pancreatitis.

Chronic pancreatitis often causes exocrine pancreatic insufficiency, meaning the pancreas doesn’t secrete enough digestive enzymes, especially lipase, to properly break down fats, proteins, and carbohydrates. When fat digestion is impaired, fats aren’t absorbed and pass out in the stool, leading to fat malabsorption (steatorrhea). Since fat is highly calorically dense, losing it in the urine and stool reduces overall calorie absorption, so a person can lose weight even if their appetite and eating habits are normal. This malabsorption also explains possible deficiencies in fat-soluble vitamins.

The other options don’t fit the situation: simply having increased activity would raise energy use but doesn’t address the failure to digest and absorb nutrients; a high-fiber diet can affect digestion but doesn’t cause the specific malabsorption seen with pancreatic enzyme deficiency; dehydration can cause temporary weight loss but not the steady, digestion-based weight loss seen in chronic pancreatitis.