Does an elevated maldigestion score with normal pancreatic elastase point to nonpancreatic digestive bottlenecks?

Evaluating digestive function in older adults requires distinguishing between pancreatic and nonpancreatic causes of malabsorption. When clinical markers indicate fat maldigestion despite normal fecal elastase-1 (FE-1) levels, primary pancreatic exocrine insufficiency is highly unlikely, directing clinical attention toward alternative gastrointestinal bottlenecks.

Clinical evidence

• Diagnostic Discordance: A normal fecal elastase-1 level (FE-1 > 200 µg/g) in the presence of an elevated maldigestion score or documented steatorrhea clinically rules out primary pancreatic exocrine insufficiency.
• Targeted Diagnosis: Rather than initiating pancreatic enzyme replacement therapy, this diagnostic discordance shifts the clinical focus toward upstream, mucosal, or luminal pathologies.

Mechanistic explanations

• Bile Acid Malabsorption & SIBO: Small intestinal bacterial overgrowth (SIBO) leads to the deconjugation of bile salts, which prevents proper micelle formation and compromises lipid digestion.
• Mucosal and Brush-Border Dysfunction: Pathologies such as celiac disease cause direct mucosal damage and villous atrophy, disrupting nutrient absorption at the brush border.
• Secondary Pancreatic Suppression: Mucosal damage from conditions like celiac disease can also suppress cholecystokinin (CCK) secretion, leading to secondary, functional pancreatic enzyme insufficiency despite normal intrinsic pancreatic reserve.
• Motility and Acid Signaling: Altered gastrointestinal transit or hypochlorhydria impairs proper chyme mixing, gastric acid signaling, and downstream digestive coordination.

Bottom line

• An elevated maldigestion score paired with a normal fecal elastase (>200 µg/g) indicates that digestive dysfunction stems from nonpancreatic bottlenecks—such as SIBO, mucosal barrier damage, or bile acid malabsorption—rather than primary pancreatic failure.