OtherResearch profile

Glutathione

GSH · L-Glutathione · Reduced Glutathione · γ-L-Glutamyl-L-cysteinylglycine

Think of it as your body's natural detox and repair kit.

Glutathione is like a master multitasker in your body, taking on roles from detoxification to antioxidant protection. It helps neutralize harmful molecules, supports your liver in processing toxins, and even plays a part in recycling vitamins C and E. It's naturally made by your cells, but sometimes people look to boost their levels through supplements or medical treatments.

In the realm of cancer care, glutathione sometimes steps in to help reduce nerve damage from chemotherapy. While it's also been explored for liver health, the results are a bit mixed. And although some people are interested in it for skin lightening, that's not an approved or well-supported use.

Overall, think of glutathione as a versatile helper that your body already knows how to use, with a few specific areas where it might lend a hand if you're getting extra support.

Who it's for

People looking to support their body's natural detox processes
Those interested in antioxidant supplements
Cancer patients seeking adjunctive therapies for chemotherapy side effects (under medical guidance)

Probably not for you if…

Anyone expecting guaranteed skin lightening results
Individuals looking for a quick fix for liver issues without medical advice
Those seeking unapproved cosmetic treatments

Editorial summary for research context · Not medical advice

Mechanism of Action

Glutathione is an endogenous tripeptide (glutamate-cysteine-glycine) synthesized in virtually all mammalian cells. It is the body's most abundant intracellular thiol antioxidant and a primary substrate for glutathione peroxidase, glutathione S-transferase, and glyoxalase enzyme systems. It neutralizes reactive oxygen species, conjugates electrophilic xenobiotics for hepatic clearance (Phase II detoxification), regenerates oxidized vitamin C and E, and supports methylation and sulfur metabolism. Oral bioavailability is limited due to GI hydrolysis; IV and IM routes are used to bypass this. Glutathione is marketed as a dietary supplement and is FDA-approved as an adjunct to chemotherapy; IV/IM glutathione marketed for skin lightening is NOT FDA-approved for that cosmetic indication and the FDA has issued warnings about unapproved injectable skin-lightening products.

Researched Benefits

Antioxidant status & oxidative-stress markers

IV glutathione acutely raises plasma thiol levels and has been studied in Parkinson's disease, chronic liver disease, and chemotherapy-induced peripheral neuropathy.

[Sechi et al. 1996]
[Cascinu et al. 2002]

Chemotherapy neurotoxicity mitigation

Randomized trials report reduced cisplatin- and oxaliplatin-associated neuropathy incidence when IV glutathione is infused before chemotherapy.

[Cascinu et al. 2002]

Hepatic support

Japanese pharmacopeia lists glutathione for chronic liver disease; clinical use in non-alcoholic fatty liver disease has produced mixed results.

Skin tone modulation (cosmetic, unapproved)

Small trials of oral and IV glutathione report lightening of melanin indices, proposed via inhibition of tyrosinase and conversion of eumelanin to pheomelanin. The FDA has NOT approved IV/IM glutathione for skin lightening and has issued public warnings about compounded injectable skin-lightening products.

[Sonthalia et al. 2016 (review)]

Research Protocols

The following dosing ranges have appeared in published research protocols. Presented for informational purposes only — not a recommendation for human use.

Clinical IV antioxidant use (physician-directed)

Dosage: 1200 mg
Frequency: 2-3x weekly
Timing: slow IV push over 15 minutes
Cycle: 4 weeks

Published clinical protocols use 600-1200 mg IV 2-3x weekly. Physician supervision is required. Compounding pharmacy sourcing matters — only USP-grade sterile product is appropriate.

Oral supplementation

Dosage: 500 mg
Frequency: once daily
Timing: empty stomach, morning
Cycle: 12 weeks

Oral glutathione bioavailability is poor; liposomal or S-acetyl glutathione formulations are marketed for improved uptake. Treat as a dietary supplement, not a drug.

Reported Side Effects

IV: flushing, rash, transient hypotension
Rare severe cutaneous adverse reactions (Stevens-Johnson syndrome) reported with compounded injectable products
Risk of contamination, embolism, or sepsis from non-sterile compounded injectables
Potential kidney and thyroid dysfunction with chronic high-dose IV use (case reports)
Pheomelanin shift concern (cosmetic): theoretical increase in UV-induced oxidative skin damage

Contraindications

Hypersensitivity to glutathione or formulation excipients
Pregnancy and lactation (IV form)
Active asthma (sulfite-containing formulations can precipitate bronchospasm)
IV/IM use for cosmetic skin lightening — FDA-unapproved and specifically warned against

Stacking Partners

Peptides commonly paired with Glutathione in published research and protocol write-ups.

longevity

NAD+

Sirtuin-pathway support

longevity

SS-31

Cardiolipin binding and mitochondrial membrane stabilization

Vendor Pricing

74
Modern Research Peptides
Best $/mg
Size1,500mg
Total$46.99
/ mg$0.03/mg
In stock
View
67
Puratek Peptides
Size1,500mg
Total$51.95
/ mg$0.03/mg
In stock
View
63
Pepvida
Size1,200mg
Total$43.20
/ mg$0.04/mg
In stock
View
67
Ignite Peptides
Size1,500mg
Total$65.00
/ mg$0.04/mg
In stock
View
72
Southern Aminos
Size1,200mg
Total$51.75
/ mg$0.04/mg
In stock
View
73
Royal Peptides
Size1,500mg
Total$70.00
/ mg$0.05/mg
In stock
View
75
Swiss Chems
Size600mg
Total$29.95
/ mg$0.05/mg
In stock
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73
Platinum Lion Peptides
Size1,500mg
Total$69.99
/ mg$0.05/mg
In stock
View

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Gear + Companions

Reconstitution supplies and research-backed supplement companions for Glutathione. Editorial picks only — we earn a commission through Amazon on the click, no sponsorship.

Gear you'll need

· Reconstitution + storage essentials

Bacteriostatic Water 30mL (0.9% Benzyl Alcohol)
Empower Pharmacy / generic medical supply
Reconstitutes every lyophilized peptide. 28-day viability refrigerated.
View at Pantheon →
Insulin Syringes 31G × 5/16" × 0.5mL (100 count)
EasyTouch
31G × 0.5mL insulin syringes — the default size for sub-0.25mL peptide doses.
Buy on Amazon →
Alcohol Prep Pads (Sterile, 200 count)
Dynarex
Sterile 70% IPA prep pads — one per vial stopper + one per injection site.
Buy on Amazon →
1-Quart Sharps Disposal Container
BD / Becton Dickinson
FDA-cleared sharps container — pharmacies won't accept improvised disposal.
Buy on Amazon →

As an Amazon Associate we earn from qualifying purchases · Disclosed per FTC guidelines

Research Papers

Reduced intravenous glutathione in the treatment of early Parkinson's disease
Sechi G, et al. · Progress in Neuro-Psychopharmacology & Biological Psychiatry · 1996
PubMed 9053128 →
Neuroprotective effect of reduced glutathione on oxaliplatin-based chemotherapy in advanced colorectal cancer
Cascinu S, et al. · Journal of Clinical Oncology · 2002
PubMed 12377960 →
Glutathione as a skin whitening agent: facts, myths, evidence and controversies
Sonthalia S, et al. · Indian Journal of Dermatology, Venereology and Leprology · 2016
PubMed 26728803 →

Glutathione

Mechanism of Action

Researched Benefits