Evidence-based·Last reviewed May 30, 2026·How we grade evidence

Monolaurin

Fatty-acidMonoglyceride

Useful mainly for people seeking a 'natural antimicrobial,' though human clinical evidence is absent.

Quick decision guide

May help most

people seeking a 'natural antimicrobial,' though human clinical evidence is absent

Common dosing range

Commonly several hundred mg to a few grams per day (not clinically validated)

When to expect effects

Unclear

Watch out for

no controlled human trials for infection; do not use in place of needed medical treatment

What is it

Monolaurin (glycerol monolaurate) is a monoglyceride formed from glycerol and lauric acid, a fatty acid found in coconut oil and breast milk. It is widely used as a food emulsifier and is marketed as an antimicrobial/antiviral supplement, based on laboratory evidence that it can disrupt the lipid membranes of certain microbes.

Is it worth it for you?

Use this as a quick fit check, not a diagnosis.

Worth considering if…

you want a low-risk supplement and understand the evidence is laboratory-stage

Probably skip if…

you need treatment for an actual infection (use proven therapy)
you expect demonstrated antiviral effects in people
you want clinical-trial backing before spending money

Evidence at a glance

antimicrobial / antiviral support

Mixed Evidence
Effect
Not established in humans
Best fit
not established
Time
Unclear

Evidence for 1 use

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

antimicrobial / antiviral support

Mechanism only
Mixed Evidence

In laboratory studies monolaurin can inactivate lipid-enveloped viruses and some bacteria by disrupting their membranes, and it suppresses bacterial toxin production at low concentrations. These effects are demonstrated in vitro and in some animal/topical work; there are no controlled human trials showing oral monolaurin treats or prevents infections.

Effect size
Not established in humans
Time to effect
Unclear
Best fit
not established

Bottom line: Antimicrobial activity is real in the lab but unproven as an oral supplement in people.

SourceSchlievert et al., 2019 — PMCSchlievert et al., 2012 — PMC

How to take it

1. Typical dose
Not clinically established; follow product labeling, often a few hundred mg to a few grams daily
2. Timing
with meals
3. With food
with food
4. Split dosing
manufacturers often suggest dividing the dose
5. How long to try
No validated duration

What to track

general tolerance and GI symptoms

Safety

Know the common side effects, key cautions, and who should avoid it.

Common side effects

generally well toleratedpossible GI upset at higher doses

Who should avoid it

  • pregnant or breastfeeding women (insufficient data)

Pregnancy & breastfeeding

Considered safe as a food additive in normal amounts, but supplemental doses are not studied in pregnancy.

Choosing a product

What to look for on the label — and what to be skeptical of.

Look for…

states monolaurin (glycerol monolaurate) content
minimal unnecessary fillers

Be skeptical of…

claims to treat or prevent viral infections, herpes, or flu
immune 'defense' cure claims
implying it can replace antibiotics or antivirals

References by claim

antimicrobial / antiviral support

Schlievert et al., 2019 — PMC (2019) link

Schlievert et al., 2012 — PMC (2012) link

Track Monolaurin with Pilora

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

Coming to App Store
Evidence-based·Last reviewed May 30, 2026·Evidence current as of May 30, 2026·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.