Lactotripeptide

ProteinTripeptideBest in the eveningBest taken with food

What is it

Lactotripeptides are small protein fragments, mainly Isoleucine-Proline-Proline (IPP) and Valine-Proline-Proline (VPP), produced from milk casein by enzymatic digestion or by lactic acid bacteria during fermentation.

Evidence for 1 use

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

Mild hypertension

Good Evidence

Meta-analyses suggest a small reduction in systolic blood pressure (typically 2-5 mmHg) in people with mild hypertension. Effects are larger in Asian populations than in Western ones, and not all trials are positive.

How it works

IPP and VPP can inhibit angiotensin-converting enzyme (ACE), which converts angiotensin I to the blood-pressure-raising angiotensin II. By blocking this enzyme, lactotripeptides may produce a modest blood-pressure-lowering effect similar in mechanism (though not in magnitude) to ACE inhibitor drugs. Some of the tripeptides survive digestion intact and reach the bloodstream where the ACE-inhibiting effect can occur. Sour milk products containing IPP/VPP are sold in Japan and Europe as functional foods aimed at mild hypertension.

Dosage

Most studies use 3.4-14.5 mg of combined IPP and VPP per day, typically 5-7 mg, usually for at least 4-8 weeks to see effects. Higher doses do not appear to add further benefit.

When and how to take it

Most studied regimens take the product once daily, often in the evening or with a meal. Consistency matters more than precise timing for cumulative blood pressure effects.

2 commercial forms

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

Fermented milk (Lactobacillus helveticus)

Sold as functional sour-milk drinks containing standardized levels of IPP/VPP.

The most studied source; IPP and VPP form during fermentation.

Casein hydrolysate concentrate

Used in tablet and capsule products.

Concentrated form supplying defined milligrams of IPP+VPP per serving.

Safety

Lactotripeptides have a strong safety record in trials and have been consumed as food ingredients in Asia and Europe for years. Side effects, when reported, are mild and infrequent (occasional GI complaints).

Who should be cautious

People with milk protein allergy should avoid milk-derived lactotripeptide products. Those on multiple blood-pressure medications should consult a clinician before adding lactotripeptides.

Interactions

Theoretical additive effect with antihypertensive drugs, especially ACE inhibitors and ARBs. The blood pressure reduction from lactotripeptides is modest, but people on prescription antihypertensives should monitor blood pressure if adding lactotripeptide products.

Food sources

Fermented sour milk products

Amount
Variable
%DV
—

Aged cheeses

Amount
Trace amounts
%DV
—

Frequently asked questions

Will lactotripeptides replace my blood pressure medication?⌄

No. The blood pressure effect is small and slow. People on prescription medications should not stop them; lactotripeptides are best discussed as an adjunct under clinical guidance.

Are lactotripeptides safe with milk allergy?⌄

Products derived from milk casein may not be safe for people with milk protein allergy. Check the label and consult an allergist if uncertain.

References

Lactotripeptide on Wikidata — Wikidata link

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

Research on Lactotripeptide (PubMed search) — PubMed link

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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.