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

Acetyl-l-glutathione

SpecialtyTripeptide

Useful mainly for people wanting to raise glutathione status with an oral form.

Quick decision guide

May help most

people wanting to raise glutathione status with an oral form

Common dosing range

100–300 mg/day

When to expect effects

Weeks for glutathione levels

Watch out for

evidence is limited and centered on raising a biomarker, not on clinical outcomes

What is it

Acetyl-l-glutathione (S-acetyl-glutathione) is a form of the antioxidant glutathione with an acetyl group attached to its sulfur atom, intended to survive digestion better than plain glutathione and raise glutathione levels inside cells. It is marketed as a more bioavailable oral glutathione for antioxidant and 'detox' support.

Is it worth it for you?

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

Worth considering if…

you specifically want to raise glutathione levels and prefer an oral form
you accept that clinical-outcome evidence is sparse

Probably skip if…

you expect proven treatment of a disease
you want strong head-to-head proof it beats cheaper options like NAC or liposomal glutathione
you are swayed by 'detox' marketing rather than data

Evidence at a glance

raising glutathione levels

Limited Evidence
Effect
Increase in blood/intracellular glutathione
Best fit
adults with low glutathione status or high oxidative stress
Time
Weeks

Evidence for 1 use

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

raising glutathione levels

Biomarker support
Limited Evidence

Small studies and the acetylated chemistry suggest S-acetyl-glutathione is absorbed more intact than plain glutathione and can raise blood and intracellular glutathione concentrations. The human evidence is limited and focused on glutathione levels and oxidative-stress markers, not on symptom relief or disease outcomes.

Effect size
Increase in blood/intracellular glutathione
Time to effect
Weeks
Best fit
adults with low glutathione status or high oxidative stress

Bottom line: It can raise glutathione levels, but a higher biomarker is not the same as a proven health benefit.

SourceLiu et al., 2025 — PubMedDi et al., 2022 — PMC

How to take it

1. Typical dose
100–300 mg/day
2. Timing
often taken on an empty stomach
3. With food
manufacturers commonly suggest without food
4. How long to try
Trial several weeks

What to track

energy and general well-being
blood glutathione or oxidative-stress markers if measured

Safety

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

Common side effects

generally well toleratedoccasional GI upset

Who should avoid it

  • pregnant or breastfeeding women (insufficient data)

Pregnancy & breastfeeding

Insufficient safety data; avoid in pregnancy and breastfeeding.

Choosing a product

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

Look for…

specifies S-acetyl-glutathione and the dose in mg
reputable brand with third-party testing

Be skeptical of…

'detox' or 'cleanse' cure claims
skin-whitening claims
claims to treat liver disease, cancer, or autoimmune conditions

References by claim

raising glutathione levels

Liu et al., 2025 — PubMed (2025) link

Di et al., 2022 — PMC (2022) link

Track Acetyl-l-glutathione 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.