Dipeptidylpeptidase

EnzymeBest with a meal

What is it

Dipeptidylpeptidase (typically DPP-IV) is an enzyme that cleaves dipeptides from the N-terminus of proteins where proline or alanine is the second residue. As a supplement ingredient, it is added to enzyme blends to help digest gluten and casein peptides.

Evidence for 1 use

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Digestion of small gluten/casein exposures

Mixed Evidence

Some evidence the enzyme can help break down small amounts of these peptides, but cannot be relied on for celiac disease protection.

How it works

DPP-IV efficiently breaks down proline-rich peptides that resist normal digestion by gastric and pancreatic enzymes. Gluten and casein are particularly rich in proline residues. By cleaving these proteins more thoroughly in the digestive tract, supplemental DPP-IV may reduce exposure to intact immunogenic peptide fragments. In humans, endogenous DPP-IV is present at the intestinal brush border and as a soluble enzyme. Supplemental DPP-IV is sourced from Aspergillus oryzae or similar microbial fermentation. It does not act systemically and does not affect the same pathway as prescription DPP-IV inhibitor drugs for diabetes.

Dosage

Dosed in enzyme activity units (DPP-IV units, HUT). Typical digestive enzyme blends provide 250-500 units per dose. DSLD label data did not include a typical dose.

When and how to take it

WHEN: With meals containing the targeted protein. HOW: In a digestive enzyme blend capsule taken at the start of a meal.

1 commercial form

Compare the main delivery options and what they’re best suited for.

DPP-IV (in digestive enzyme blend)

Combined with proteases and other enzymes.

Acts locally in the gut.

Safety

Generally well tolerated. Mild GI upset possible. No serious adverse effects commonly reported.

Who should be cautious

Not a substitute for gluten-free diet in celiac disease. Use caution in pregnancy and lactation due to limited safety data.

Interactions

Does not interact systemically with prescription DPP-IV inhibitors. No other major interactions reported.

Frequently asked questions

Can DPP-IV protect me from accidental gluten?⌄

It may help with small accidental exposures, but is not a substitute for gluten avoidance in celiac disease.

Is this the same as a diabetes drug?⌄

No. Diabetes DPP-IV inhibitors block the enzyme systemically. This is a digestive supplement that adds enzyme activity to the gut.

References

Dipeptidylpeptidase on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Dipeptidylpeptidase (PubMed search) — PubMed link

Track Dipeptidylpeptidase with Pilora

Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.

Coming to App Store
Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.