Your body makes digestive enzymes to spare, and pills help when it can’t

Key takeaways

• Your pancreas has a wide safety margin: fatty stools usually don’t show up until more than 90% of its fat-digesting enzyme output is gone².
• When the pancreas truly fails, prescription enzymes made from pig pancreas are standard care, and since April 2010 every such product has needed FDA approval²³.
• In a 1993 trial, lactase pills eased symptoms after 20 grams of lactose but didn’t improve digestion of 50 grams, so the size of your dairy portion still matters⁴.
• Bean-enzyme drops cut gas a little in small trials, but a small 1994 trial found no change in bloating or pain⁷⁸.
• Store-bought “gluten-digesting” enzymes don’t make gluten safe with celiac disease; a 2017 Columbia University review of 14 products found no scientific basis for their claims¹⁴.

For decades, people whose pancreas had stopped working swallowed enzyme pills that no one had to prove worked. The pills were made from animal pancreas, and some versions were on sale before the 1938 federal drug law²³.

When FDA reviewers took a hard look, they found a problem. Formulas, doses and manufacturing varied from brand to brand, and even from one batch to the next³. For someone who needs these enzymes at every meal, that kind of swing matters.

In 2004, the agency declared every pancreatic enzyme product a new drug that needed approval. After an extension, the deadline arrived on April 28, 2010³. By 2016, six products had been approved in the United States⁴.

That history holds a lesson for anyone eyeing the enzyme shelf at a health food store. Digestive enzymes are powerful. When the body truly can’t make enough, the right enzyme at the right dose can change a life.

Most bottles sold for everyday bloating, though, are dietary supplements. In a 2017 review of gluten-enzyme products, 11 of 14 labels said the FDA had not evaluated their claims¹⁴. Below, we cover how to tell the proven uses from the hopeful ones.

Your gut makes its own enzymes, with plenty to spare

Enzymes are proteins that speed up chemical reactions. In digestion, they cut large food molecules into pieces small enough to absorb.

The work starts in your mouth, where saliva carries an enzyme that begins breaking down starch¹. Your stomach adds acid and enzymes that go to work on protein¹. One of them, pepsin, works best in that acid bath and is a key player in lab tests of protein digestion¹³.

The heavy lifting happens in the small intestine. Your pancreas sends in a juice with enzymes for carbohydrates, fats and proteins, while bile from your liver helps digest fat¹. The intestine’s own wall makes more digestive juice to finish the job¹.

Enzymes built into that wall handle specific sugars. Lactase splits lactose, the sugar in milk, and sucrase-isomaltase splits table sugar and maltose, a sugar found in grains⁵⁹. Even your microbes help: NIDDK, the federal digestive disease institute, notes that bacteria in the small intestine make some of the enzymes needed to digest carbohydrates¹.

The most surprising fact is the reserve. Lipase, the pancreas’s fat-digesting enzyme, can fall by more than 90% before fatty stools appear. People usually come to a doctor when less than 10% of pancreatic function is left².

That’s a reassuring design for anyone who trusts the body’s own capacity. It also means that when fat digestion fails, the pancreas has usually lost most of its function. That calls for a diagnosis, not a guess.

When the pancreas fails, prescription enzymes are real medicine

Exocrine pancreatic insufficiency, or EPI, means the pancreas no longer makes enough digestive enzymes. The leading causes of lasting EPI are chronic pancreatitis and cystic fibrosis². Others include pancreatic tumors, stomach or weight-loss surgery, and some cases of diabetes, celiac disease and Crohn’s disease².

Undigested fat is the telltale sign. Doctors look for fatty stools and weight loss, and they may measure fat in a stool sample⁴.

Treatment is pancreatic enzyme replacement therapy, often shortened to PERT. These are prescription capsules made from the pancreas of pigs raised for food. They supply the same three kinds of enzymes a healthy pancreas makes¹³.

Does it work? In the FDA’s review of Creon, 32 people with cystic fibrosis, ages 12 to 43, took the drug for about a week and a placebo, or dummy pill, for another week³. Doctors measured the share of dietary fat their bodies absorbed. On Creon, that share averaged 39 percentage points higher than on placebo³.

The details show why this belongs with a prescriber. Adults typically need about 25,000 to 40,000 units of lipase per meal and less with snacks². A coating shields the enzymes from stomach acid and dissolves in the small intestine².

More isn’t better. High doses have been linked to fibrosing colonopathy, a scarring of the colon seen mainly in people with cystic fibrosis²³. Cystic fibrosis guidelines cap the dose, and the FDA required a medication guide for patients³.

The FDA also treats it as a theoretical, very rare risk that a pig virus could pass through these products, so their labels carry a warning³. If you avoid pork for religious or personal reasons, the source may weigh on you. Our article on faith and wellness decisions covers how to raise that with your clinician.

If you think you have EPI, don’t reach for a store blend. You need the cause found and a dose matched to your body weight and meals²³.

Lactase is the enzyme many adults lose, and pills replace some of it

When lactase runs low, undigested lactose can bring gas, bloating and diarrhea. Our article on when health advice doesn’t fit your body covers how common this is.

Lactase products come as tablets you swallow before dairy or drops you add to milk⁵. NIDDK advises checking with your doctor before using them. It also notes that young children and pregnant or breastfeeding women may not be able to use them⁵.

The trial evidence is real but modest. In a 1993 study described in a 2016 review, three lactase products (a soft gel, a caplet and a chewable) all eased symptoms after a 20-gram dose of lactose⁴. They also lowered breath hydrogen, a sign of undigested lactose, and 6,000 units lowered it more than 3,000⁴.

With 50 grams of lactose, though, neither dose improved digestion⁴. A pill can stretch your limit. It won’t erase it.

Doses vary widely by brand. The review’s table lists products from about 2,250 to 100,000 units, with Lactaid at 9,000⁴. Compare units, not just price.

Traditional foods offer another route. Live yogurt cultures cut lactose by 25% to 50%⁴. And if an injury to the small intestine, such as an infection, is behind your symptoms, treating that cause may help⁵.

Bean drops and a yeast enzyme fill two narrow gaps

Beans carry sugars your own enzymes can’t split, so gut bacteria ferment them into gas. Alpha-galactosidase, sold as drops or tablets, breaks down those sugars before bacteria get them⁷.

In a 1994 University of California, San Diego trial, volunteers twice ate a chili of unsoaked beans, cabbage, broccoli and cauliflower, a week apart⁷. They got the enzyme one time and a dummy the other. Of 30 people who signed up, 19 finished⁷.

Across the six hours after the meal, the enzyme lowered the hourly count of gas episodes, though only one hour stood out on its own⁷. Bloating and pain scores showed no difference, but with just 19 finishers the trial had limited power to detect one⁷.

The authors called the product somewhat helpful and couldn’t name an ideal dose. The manufacturer didn’t fund the study⁷.

A 2009 evidence review in American Family Physician backed the enzyme for cutting gas volume, based on small randomized trials. It rated a 1,200-unit dose moderately effective and a 300-unit dose minimally effective⁸. Our article on legumes covers cooking tricks that cut gas, too.

Some people should check first. If you have diabetes, count the extra sugar: treated food gains a few grams of carbohydrate for every 100 grams⁷. Allergic reactions are rare and show up most often in people allergic to mold. And because the enzyme sets galactose loose, the authors said people with galactosemia, a rare inherited disorder, should probably steer clear⁷.

The second gap is rarer. Congenital sucrase-isomaltase deficiency, or CSID, is an inherited disorder in which the gut can’t digest table sugar or maltose⁹. Cramps, bloating, gas and diarrhea usually start when a baby begins fruit, juice and grains⁹. It affects about 1 in 5,000 people of European descent, and up to 1 in 20 in some Indigenous populations of Greenland, Alaska and Canada⁹.

The FDA approved sacrosidase, sold as Sucraid, in 1998¹¹. It’s an enzyme made from baker’s yeast¹⁰. In its main trial of 28 children, about 86% of those under 3 and 77% of older children became symptom-free; a second study gave mixed results¹⁰.

It replaces only half the missing pair. It doesn’t stand in for isomaltase, so some people still need to limit starchy foods¹⁰.

Raw-food enzymes run into a wall of stomach acid

A popular idea in natural-food circles says raw foods carry their own enzymes, cooking destroys them, and your body then has to work harder. Parts of it are true.

Papaya, pineapple, figs and kiwi do contain protein-cutting enzymes: papain, bromelain, ficin and actinidin¹⁵. And heat can harm enzymes. The FDA label for one enzyme drug, Sucraid, warns against mixing it into warm or hot drinks¹⁰.

The trouble starts in your stomach. Enzymes are proteins, and the stomach is built to break proteins down. After a meal, stomach pH can drop to about 1 or 2, which is strongly acidic²¹³.

Lab work shows what happens to fragile enzymes there. Lipase is permanently damaged at a pH of 4 or below⁴. An enzyme from papaya, sold to help with gluten, held up at pH 3 but was quickly broken down by pepsin at pH 2, so the researcher concluded it needs a protective coating¹³. Sucraid’s label even warns against taking it with fruit juice, because the acid may weaken it¹⁰.

That’s why most prescription pancreatic enzymes come in coated capsules². Enzymes in a fresh pineapple come with no coating at all.

Add your 90% reserve, and the case that you need food’s own enzymes to digest a meal looks thin. A 2021 review found only animal studies of papain, bromelain and ficin for gut effects¹⁵. A 2016 review called plant enzymes promising but cited no trials⁴.

Kiwifruit is a tasty exception worth knowing. In small trials, adults eating kiwi daily had more frequent, softer stools, though reviewers say the fruit’s fiber likely helps and actinidin’s role is unclear¹⁵.

None of this argues against raw produce. Eat it for flavor, fiber and variety, and cook what tastes better cooked. Our article on cooking methods explains which nutrients heat helps or harms. Respecting the body, here, means trusting the enzyme system it already runs.

Supplement blends, fruit enzymes and gluten pills don’t measure up

Over-the-counter enzyme blends are sold as dietary supplements, and the FDA has little authority over them, as a report on the Columbia study noted¹⁴. Unlike prescription enzymes, they don’t go through the approval process the FDA required in 2010³.

We didn’t find strong trials of these blends for everyday bloating. Pineapple and papaya enzymes fare no better, with animal studies but no human trials in the reviews we read⁴¹⁵. Our upcoming article on digestive supplements looks at products in more depth.

The clearest verdict concerns gluten. In celiac disease, gluten sets off an autoimmune reaction¹⁴. The protein also resists full digestion because it’s rich in an amino acid called proline¹³.

In 2017, researchers at Columbia University’s Celiac Disease Center looked at the evidence behind 14 “glutenase” supplements. None had science showing it could break down the parts of gluten that harm people with celiac disease, and one even listed wheat among its ingredients¹⁴. “Perhaps the biggest hazard is the false sense of security these agents provide,” said Benjamin Lebwohl, MD, one of the authors¹⁴.

A 2021 University of Melbourne lab study found that some products broke down gluten fragments faster than others¹³. It was funded by one product’s maker, and the author said lab results don’t mimic real digestion¹³. In human trials, one well-studied enzyme, AN-PEP, was well tolerated but didn’t protect against symptoms¹³.

The Columbia team judged these products entirely inadvisable for people with celiac disease, and Lebwohl said they can’t replace the gluten-free diet¹⁴.

Real enzyme drugs may come someday. In 2017, a candidate called latiglutenase had disappointed in one trial¹⁴, and by 2021 it and others, such as TAK-062, were still in development¹³. None is a proven treatment yet. Our article on gut-healing claims covers celiac testing.

Your enzyme decision table

Situation	Enzyme	Evidence	Where you get it	Who to ask
Fatty stools and weight loss, or chronic pancreatitis or cystic fibrosis	Pancrelipase (PERT)	Strong evidence23	Prescription	Gastroenterologist
Gas, bloating or loose stools after dairy	Lactase tablets or drops	Promising but early4	Store	Your doctor first if pregnant, breastfeeding or treating a young child5
Gas after beans and cabbage-family vegetables	Alpha-galactosidase	Promising but early78	Store	Your doctor first with galactosemia or diabetes7
A child with diarrhea and bloating after fruit, juice or grains	Sacrosidase, after a CSID diagnosis	Promising but early (FDA-approved on small trials)10	Prescription	Pediatric gastroenterologist
Celiac disease	Store “gluten-digesting” enzymes	Evidence says no, or unsafe1314	Store	Celiac specialist or dietitian
Everyday bloating or “slow digestion”	Multi-enzyme blends, bromelain, papain	Not enough evidence415	Store	A clinician who can look for a cause
Wanting raw food’s enzymes to aid digestion	Enzymes in raw fruits and vegetables	Not enough evidence415	Food	No one needed; enjoy the produce

Questions readers ask

The bottom line

Your gut runs a capable enzyme system with a large reserve, from saliva to the small intestine. When that system truly fails, as in pancreatic insufficiency, prescription enzymes are tested, regulated and effective.

In between sit a few targeted tools with modest proof: lactase for dairy, alpha-galactosidase for beans and a yeast enzyme for one rare disorder. Broad blends, raw-food enzyme theories and gluten pills have the least support. Match the enzyme to a specific problem, and see a clinician when symptoms are new, severe or don’t fit a pattern.

Related reading

• Cooked beans are cheap and well studied, and the lectin scare applies to raw ones
• Some health advice won’t fit your body, and some exceptions are just excuses
• Leaky gut can be measured, but most “heal your gut” protocols haven’t been tested
• Why supplement labels say ‘supports’ and never say ‘cures’
• Faith shapes how people eat, fast and decide, and your clinician should know

Sources

1. National Institute of Diabetes and Digestive and Kidney Diseases. “Your Digestive System & How It Works.” NIDDK, last reviewed December 2017. niddk.nih.gov
2. Fieker A, Philpott J, Armand M. “Enzyme Replacement Therapy for Pancreatic Insufficiency: Present and Future.” Clinical and Experimental Gastroenterology, 2011;4:55-73. pmc.ncbi.nlm.nih.gov
3. U.S. Food and Drug Administration, Center for Drug Evaluation and Research. Cross-discipline team leader review, Application Number 20-725, Creon (pancrelipase) delayed-release capsules. FDA, April 2009. accessdata.fda.gov
4. Ianiro G, Pecere S, Giorgio V, Gasbarrini A, Cammarota G. “Digestive Enzyme Supplementation in Gastrointestinal Diseases.” Current Drug Metabolism, 2016;17(2):187-193. pmc.ncbi.nlm.nih.gov
5. National Institute of Diabetes and Digestive and Kidney Diseases. “Treatment for Lactose Intolerance.” NIDDK, last reviewed February 2018. niddk.nih.gov
6. National Institute of Diabetes and Digestive and Kidney Diseases. “Symptoms & Causes of Diarrhea.” NIDDK, last reviewed September 2024. niddk.nih.gov
7. Ganiats TG, Norcross WA, Halverson AL, Burford PA, Palinkas LA. “Does Beano Prevent Gas? A Double-Blind Crossover Study of Oral Alpha-Galactosidase to Treat Dietary Oligosaccharide Intolerance.” Journal of Family Practice, 1994;39(5):441-445. pubmed.ncbi.nlm.nih.gov
8. Bailey J, Carter NJ, Neher JO. “Effective Management of Flatulence” (FPIN’s Clinical Inquiries). American Family Physician, 2009;79(12):1098–1100. aafp.org
9. MedlinePlus Genetics. “Congenital Sucrase-Isomaltase Deficiency.” National Library of Medicine, last updated February 14, 2023. medlineplus.gov
10. QOL Medical. “Sucraid (Sacrosidase) Oral Solution.” FDA-approved prescribing information, revised August 2024. accessdata.fda.gov
11. U.S. Food and Drug Administration, Office of Orphan Products Development. “Search Orphan Drug Designations and Approvals,” record for sacrosidase (Sucraid). Accessed October 2026. accessdata.fda.gov
12. U.S. Attorney’s Office, District of Massachusetts. “QOL Medical and Its CEO Agree To Pay $47 Million for Allegedly Paying Kickbacks To Induce Claims for QOL’s Drug Sucraid.” November 15, 2024 (reposted by FDA’s Office of Criminal Investigations). fda.gov
13. Tanner GJ. “Relative Rates of Gluten Digestion by Nine Commercial Dietary Digestive Supplements.” Frontiers in Nutrition, December 7, 2021. frontiersin.org
14. Ratner A. “Celiac Disease Patients Warned About Dietary Supplements” (on a Columbia University Celiac Disease Center study in Therapeutic Advances in Gastroenterology, 2017). Beyond Celiac, July 19, 2017. beyondceliac.org
15. Bellini M, Tonarelli S, Barracca F, et al. “Chronic Constipation: Is a Nutritional Approach Reasonable?” Nutrients, 2021;13(10):3386. pubmed.ncbi.nlm.nih.gov