Digestive enzymes and fatty liver: does the liver even make digestive enzymes?

No trial we've found tests a digestive enzyme supplement, including DigeZyme, for fatty liver disease. And the liver itself isn't where digestive enzymes come from in the first place — that's mostly the pancreas. The research that does exist links fatty liver to lower pancreatic enzyme output, which points away from a supplement being the fix, not toward it.

What the evidence doesn't support

It doesn't support digestive enzyme supplements as a treatment for fatty liver disease, or as something the liver needs to make its own digestive enzymes work. No controlled trial we've found has given a digestive enzyme supplement to someone with fatty liver disease and measured what happened to their liver.

Does the liver produce digestive enzymes?

Not the kind that break food apart in the gut. Those — amylase for starch, protease for protein, lipase for fat, and others — come mainly from the pancreas, with the salivary glands and the small intestine's own lining contributing a few more. The liver's job in digestion is different: it makes bile, a fluid containing bile acids and cholesterol that emulsifies dietary fat into smaller droplets so pancreatic lipase can act on it more effectively. Bile itself isn't an enzyme — it doesn't catalyze a chemical reaction the way an enzyme does; it's more like a detergent that breaks large fat globules into something an enzyme can reach. What people sometimes call "liver enzymes" on a blood test (ALT and AST, for example) are yet another thing again: markers doctors check to look for liver cell damage, not substances involved in digesting a meal.

What the trials found

The only controlled trial of DigeZyme itself gave 40 adults with functional dyspepsia the enzyme blend alone — 150 mg a day for 60 days — against a placebo, and reported improved symptom scores with no product-related adverse events; it didn't include anyone with diagnosed liver disease and didn't measure any liver-related outcome.

A pilot study imaged the pancreas in people with confirmed fatty liver disease and in a screening-program control group, and found signs of fatty pancreas on imaging in 85% of the fatty-liver group versus 55% of controls — a real association between the two organs. But when researchers actually tested for pancreatic enzyme insufficiency with stool and breath tests, they didn't confirm it in either group, even in patients whose initial enzyme marker was low. The same paper reviewed five other published studies and found a much wider range — enzyme insufficiency reported in 9% to 56% of people with fatty pancreas, depending on the study.

A separate systematic review of 19 studies and more than 15,000 patients found low blood amylase — a marker of reduced pancreatic enzyme output — associated with several conditions, non-alcoholic fatty liver disease among them, alongside diabetes, metabolic syndrome and chronic pancreatitis. That's a correlation between fatty liver and lower enzyme output as measured in the blood, not a trial of giving someone an enzyme supplement and watching their liver improve. If anything, it points the opposite direction from what "digestive enzymes for fatty liver" implies: the finding is about people with fatty liver disease sometimes making less of their own enzyme, not about a supplement fixing the liver.

Questions people ask

Does the liver produce digestive enzymes?

Not the food-breaking-down kind. The pancreas is the main source of those. The liver's digestive contribution is bile, which physically breaks up fat for other enzymes to act on, rather than functioning as an enzyme itself.

What digestive enzymes does the liver make?

None of the classic digestive enzymes (amylase, protease, lipase) are made by the liver in a meaningful amount for digestion. The liver does produce various enzymes involved in its own metabolic work, and blood tests for some of them (ALT, AST) are used to check for liver damage — but those aren't enzymes that break down food in the gut.

Is there a digestive enzyme worth taking for fatty liver?

We can't point to one, because no trial has tested a digestive enzyme supplement for fatty liver disease. The available research is about an association between fatty liver and reduced pancreatic enzyme output, not a tested treatment.

When to talk to a doctor

Fatty liver disease is diagnosed and monitored by a doctor, usually with imaging and blood tests, and managed primarily through diet, weight and metabolic health. Digestive enzyme supplements are not a treatment for fatty liver disease, and nothing in the research above supports using one for that purpose. If you have a diagnosed liver condition or abnormal liver blood tests, ask a doctor before adding any supplement.

See what is DigeZyme and digestive enzymes: what the research does and doesn't show for the wider evidence on this ingredient.