Digestive Enzymes: What They Do, Who Needs Them and What Works

Digestive enzymes are proteins that cut food into pieces small enough to absorb. Your mouth, stomach, pancreas and small intestine make them every day. As supplements, the evidence is clearest when one enzyme is matched to one specific gap: lactase for the milk sugar lactose, alpha-galactosidase for the gassy sugars in beans, and prescription pancreatic enzymes for people whose pancreas cannot make enough. For everyday bloating with no known cause, the research on broad enzyme blends is small, short and sometimes run by the companies that sell them. Here is how the different types work, what the studies found and how to read a label.

Peptide Labs sells products that contain enzymes, but this article does not recommend any of them. It is general information, not medical advice.

What are digestive enzymes?

Enzymes speed up chemical reactions. Digestive ones split large food molecules: proteins into amino acids and short chains, starches into sugars, and fats into fatty acids. Most of the heavy lifting happens in the small intestine, using enzymes released by the pancreas and enzymes built into the intestinal lining. A few food components resist human enzymes altogether, which is why some fibers and bean sugars reach the colon intact and get fermented by bacteria.

Supplements draw enzymes from three main sources. Pancreatin and pancrelipase come from pig pancreas. Bromelain and papain are protein-digesting enzymes from pineapple and papaya. Many blends use enzymes made by fungi such as Aspergillus. A 2016 review in Current Drug Metabolism noted that products differ widely in enzyme type, source and strength, so two bottles called “digestive enzymes” can have little in common.

Enzyme	What it breaks down	Made by your body?	Common supplement sources
Amylase	Starches	Yes, saliva and pancreas	Fungal enzymes, pancreatin
Protease (incl. bromelain, papain)	Proteins	Yes, stomach and pancreas	Pineapple, papaya, fungal enzymes, pancreatin
Lipase	Fats	Yes, mainly pancreas	Fungal enzymes, pancreatin
Lactase	Lactose (milk sugar)	Yes, small intestine; often declines in adults	Fungal or yeast enzymes
Alpha-galactosidase	Gassy sugars in beans and some vegetables	No	Fungal enzymes (as in Beano)
Cellulase	Cellulose in plant cell walls	No	Fungal enzymes

Prescription enzymes vs digestive enzyme supplements

Some people truly lack digestive enzymes. In exocrine pancreatic insufficiency, the pancreas no longer releases enough of them, for example with cystic fibrosis, chronic pancreatitis, pancreatic tumors or after pancreas surgery. Pancreatic enzyme products for that condition were sold for decades, some from before the 1938 food and drug law, and some over the counter.

When FDA reviewed them, it found significant differences in how much active enzyme different manufacturers’ products delivered. Under federal rules (21 CFR 310.543), over-the-counter products labeled for this condition count as new drugs that need FDA approval. FDA also decided these products should be prescription only, and it stopped allowing unapproved versions after April 28, 2010. Creon (pancrelipase) was the first approved under that process, on April 30, 2009.

The enzyme blends sold next to vitamins are dietary supplements. FDA does not review them for effectiveness before sale, and they cannot claim to replace prescription enzymes. The Pancreatic Cancer Action Network says over-the-counter enzyme supplements may vary from batch to batch and does not recommend them for people with pancreatic cancer.

Signs that need a clinician

• Greasy, pale or foul-smelling stools, or stools that float and are hard to flush; NIDDK lists greasy stools among the symptoms of chronic pancreatitis.
• Weight loss you did not plan, ongoing diarrhea, blood in the stool, or black stools.
• Belly pain that is severe, keeps coming back or wakes you at night.
• Vomiting that persists, trouble swallowing, or new symptoms after age 50.

These can point to conditions that need testing. Taking a supplement first can delay a diagnosis.

Do digestive enzymes work? What the trials show

The fair answer depends on which enzyme and which problem. Matching a specific enzyme to a specific food has the most direct support. Broad blends for general symptoms have much less.

Lactase for lactose

NIDDK describes lactase products as tablets or drops containing the enzyme that breaks down lactose. In a 2021 crossover trial of 47 adults whose lactose intolerance was confirmed by breath test, lactase tablets lowered symptom scores and breath hydrogen compared with placebo. Tolerance varies, and some people simply need to limit lactose rather than avoid it.

Alpha-galactosidase for beans

Humans do not make an enzyme that splits the sugars in beans, so bacteria ferment them in the colon. In a 1994 crossover study of 19 people eating meatless chili, Beano drops cut the number of gas episodes, but bloating and pain were no different from placebo. A 2007 study in 8 healthy volunteers found less breath hydrogen and milder flatulence after a bean meal. A larger 2016 trial in 125 people with irritable bowel syndrome found no evidence to support routine use, and more people dropped out on the enzyme, mostly because of belly pain and diarrhea.

Broad enzyme blends

A 2018 trial gave 40 people with functional dyspepsia (indigestion with no structural cause) a multi-enzyme product or placebo for 60 days and reported better symptom scores; its authors work for the company that makes the enzyme. A 2023 single-center trial in 120 adults reported similar improvements with a fungal enzyme blend. A 2018 review of 60 years of multi-enzyme studies found mostly positive reports but noted that no trial worked out which ingredient did what, and called for longer, better-designed studies.

Digestive enzymes benefits: what labels can and cannot say

Supplement labels may describe how an ingredient supports normal digestion, but they may not claim to diagnose or relieve a disease. That is why you see phrases like “supports digestion” next to the standard FDA disclaimer. When you compare digestive enzyme supplements, check:

• Which enzymes are listed by name, not just a proprietary blend title.
• Whether enzyme activity is shown in standard units rather than weight alone; activity is what matters for an enzyme.
• The source: pig-derived pancreatin matters for vegetarians and some religious diets; pineapple and papaya enzymes matter for people with those allergies.
• Whether the enzymes are the main ingredient or a small add-on in a multi-ingredient formula.
• Third-party testing, since FDA does not check potency before sale.

Safety, side effects and interactions

Enzyme supplements are usually well tolerated, but they are not risk-free. Reported problems include stomach upset, gas and diarrhea. People allergic to pineapple or papaya can react to bromelain or papain. Memorial Sloan Kettering notes that bromelain may raise the risk of bruising and bleeding with blood thinners, based on lab and animal research, and may raise blood levels of tetracycline antibiotics. Read more in our bromelain guide.

Alpha-galactosidase is a useful example of an enzyme interaction. In a 1998 study of 37 people with type 2 diabetes, Beano reduced gas from the diabetes drug acarbose but appeared to weaken its effect on after-meal blood sugar. If you take prescription medicines, are pregnant or breastfeeding, or have a pancreatic condition, ask your clinician before adding any enzyme product.

Enzyme-containing products at Peptide Labs

We do not carry prescription pancreatic enzymes or single-enzyme lactase or Beano-style products. Enzymes appear in a few multi-ingredient supplements, where they are one part of a larger formula:

• Physician’s Choice Probiotics for Weight Management (labeled Thin 30) includes an enzyme blend listing proteases, amylase, cellulase, lactase and lipase, alongside six probiotic strains, prebiotic fiber, green tea extract and cayenne. The label does not list a CFU count.
• NUVAIOBTY GLP-1 supplement lists bromelain with an enzyme activity rating among hops extract, lemon eriocitrin, licorice root, ginger and B vitamins. The name references GLP-1, but it is a dietary supplement, not a GLP-1 medication.

For a wider look at gut products, see our guide to digestive health supplements. If gas and fullness are your main concern, our articles on easing bloating and probiotics and bloating cover diet and other options.

Frequently Asked Questions

Questions about a label? Contact us or read our Buyer’s Guide. Follow the label and ask a healthcare provider before starting any supplement, especially if you take medicines. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Last reviewed October 2026.

Related guides: Digestive Health Supplements: Fiber, Probiotics, Prebiotics and Enzymes Explained, How to Debloat: Common Causes of Bloating, What Helps and When to See a Doctor, Probiotics for Bloating and Gas: What the Strain-by-Strain Evidence Shows.