Digestive Enzymes Explained: What They Are How They Work and Who Needs Them
Digestive Enzymes Explained: What They Are, How They Work, and Who Needs Them
By Dr. Onikepe Adegbola, MD PhD — Johns Hopkins-trained physician-scientist and founder of Casa de Sante
Key Takeaways
- Digestive enzymes are proteins that break food into absorbable nutrients — without them, food passes through partially digested, causing gas, bloating, and malabsorption
- Your body produces its own enzymes (from the pancreas, stomach, and small intestine), but production decreases with age, stress, medication use, and GI conditions
- Different enzymes target different foods: lipase for fat, protease for protein, amylase for carbs, lactase for dairy, alpha-galactosidase for legumes/cruciferous vegetables
- Supplemental enzymes are not a "crutch" — they are a targeted tool that compensates for reduced production and allows you to eat more foods without symptoms
The Enzyme Families
Proteases (Protein Digestion)
Proteases break proteins into amino acids. Your stomach produces pepsin (in acid), and the pancreas produces trypsin and chymotrypsin. When protein is not fully digested, it ferments in the colon, producing foul-smelling gas (hydrogen sulfide) and contributing to bloating and discomfort.
Lipase (Fat Digestion)
Lipase breaks fat into fatty acids and glycerol. Produced by the pancreas and released into the small intestine with bile. When fat is not digested: oily/greasy stools (steatorrhea), fat-soluble vitamin malabsorption (A, D, E, K), and abdominal pain. Lipase is critical for patients with gallbladder removal, pancreatic insufficiency, or anyone on a moderate-to-high-fat diet.
Amylase (Carbohydrate Digestion)
Amylase breaks starches into simple sugars. Produced in saliva and by the pancreas. Chewing thoroughly is the first step of carb digestion — saliva amylase begins the process in the mouth.
Lactase (Dairy Digestion)
Lactase breaks lactose (milk sugar) into glucose and galactose. 68% of the global population has reduced lactase production after childhood (lactose intolerance). Undigested lactose ferments in the colon, causing gas, bloating, and diarrhea — symptoms identical to IBS.
Alpha-Galactosidase (Legume/Cruciferous Digestion)
Alpha-galactosidase breaks down GOS (galacto-oligosaccharides) found in beans, lentils, chickpeas, and cruciferous vegetables. Humans do NOT produce this enzyme. That is why beans cause gas in everyone — we literally cannot digest the GOS without bacterial fermentation (which produces gas). Supplemental alpha-galactosidase (the active ingredient in Beano) provides the enzyme we lack.
Who Benefits From Enzyme Supplementation
- IBS patients: Incomplete digestion contributes to fermentation and symptoms. Comprehensive enzyme support reduces the substrate available for bacterial fermentation.
- GLP-1 patients: Delayed gastric emptying means food sits in the stomach longer. Enzyme supplementation improves digestion despite the slower transit.
- Gallbladder removal patients: Without the gallbladder's concentrated bile release, fat digestion is impaired. Lipase supplementation is especially important.
- Older adults: Pancreatic enzyme production naturally declines with age. By age 60, many people produce 20-30% fewer enzymes than they did at age 20.
- Patients on PPIs: Proton pump inhibitors reduce stomach acid, which impairs pepsin activation and protein digestion.
- SIBO patients: Better digestion in the upper GI tract means less undigested food available for bacterial fermentation in the small intestine.
- Anyone with bloating after meals: Post-meal bloating often indicates incomplete digestion. Enzyme support is a first-line approach.
How to Take Enzymes
- Timing: Take immediately before eating or with the first few bites. Enzymes need to mix with food in the stomach.
- Every meal: Enzymes work on the meal you take them with. They do not have a cumulative effect.
- Adjust to meal size: A large meal may benefit from an additional capsule. A small snack may need only one.
- Consistency: Regular use with meals provides the most benefit. Do not save them only for "problem" meals — consistent use improves overall digestion and may reduce baseline IBS symptoms.
🛒 Enzyme Solutions
- Digestive Enzymes — Comprehensive full-spectrum formula with lipase, protease, amylase, and FODMAP-specific enzymes. MD/PhD formulated for IBS and GLP-1 patients specifically. Take before every meal.
- FODMAP Enzymes + Prebiotics + Probiotics + Postbiotics — Combines digestive enzymes WITH multi-strain probiotics, prebiotics, and postbiotics for comprehensive gut support. Enzymes handle the immediate meal; probiotics support the microbiome long-term.
Medical Disclaimer: This article is for educational purposes only. If you suspect pancreatic insufficiency (persistent oily stools, significant weight loss), seek medical evaluation — prescription-strength pancreatic enzyme replacement therapy (PERT) may be needed. Dr. Adegbola is the founder of Casa de Sante.
