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Immune Modulator

Glutathione

Also known as: GSH

Glutathione is an endogenous tripeptide (gamma-L-glutamyl-L-cysteinyl-glycine) that serves as the principal intracellular antioxidant in mammalian cells. It is not FDA-approved as a drug in the US; parenteral glutathione is used off-label (and in some compounding settings) for oxidative stress, hepatic support, and — controversially — skin lightening. The FDA has warned against injectable glutathione for skin lightening (2019) due to reports of serious adverse events.

Real-time market data

Pricing for Glutathione

Live vendor pricing, normalized to $/mg so sizes compare fairly — fused with each seller's Merit trust score and latest independent COA purity. Prices refresh daily.

Average price

$0.06/mg

range $0.02–$0.30/mg

Sellers

65

from $0.00

45-day trend

+5.6%

vs 45-day avg $/mg

53 of 65 sellers have a current price· 17 stale listings hidden (not seen in 7 days)

Prices observed from public storefronts (last 24h), normalized to $/mg. "Evidence" is Merit's 0–100 Merit Score, derived only from observable verification evidence (methodology on /about); "Purity" is the latest independent COA. Some buy links are affiliate links — Merit may earn a commission at no extra cost to you, and where a vendor offers one, the code shown gets you a discount at their checkout. Affiliate status never affects price data, ranking, or the Merit Score (full policy on /disclosure). Research use only.

Independent evidence

COAs for Glutathione

83 third-party tests across 19 vendors. Each card links to the full report.

All 83 COAs for Glutathione →
Measured purity 98.7%–100.0% across 59 COAs
Measured purity over time
Aggregated · 3rd-party listing
99.74 %
Jun 2026
AccumarkLabs Limited

For

Glutathione

by Synthesis Peptides· batch GL15KC

Aggregated · 3rd-party listing
99.74 %
Jun 2026
Freedom Diagnostics Moderate

For

Glutathione

by Orbitrex Peptides· batch GL15KC

✓ Vendor-published
99.81 %
Jun 2026
Freedom Diagnostics Moderate

For

Glutathione

by Ion Peptide· batch GTT1500-06242026

COA on file
Aggregated · 3rd-party listing
99.81 %
Jun 2026
Freedom Diagnostics Moderate

For

Glutathione

by Ion Peptide· batch GTT1500-06242026

Aggregated · 3rd-party listing
99.34 %
Jun 2026
ILS Labs Strong

For

Glutathione

by Voltera Sciences· batch GT1500-05042026

Aggregated · 3rd-party listing
99.34 %
Jun 2026
ILS Labs Strong

For

Glutathione

by Voltera Sciences· batch GT1500-05042026

Aggregated · 3rd-party listing
99.01 %
Jun 2026
Janoshik Analytical Limited

For

GLUTATHIONE

by Verified Peptides· batch GL0526031500B

Aggregated · 3rd-party listing
98.71 %
Jun 2026
ILS Labs Strong

For

Glutathione

by Crush Research· batch CRGLU-1500-2605-2

Aggregated · 3rd-party listing
99.03 %
May 2026
Freedom Diagnostics Moderate

For

Glutathione

by Peptide Supply Co.· batch GTT1.505192026

Aggregated · 3rd-party listing
99.30 %
May 2026
ILS Labs Strong

For

Glutathione

by Sunrise Bioresearch· batch GLU1500MAY26-01

✓ Vendor-published
99.30 %
May 2026
ILS Laboratories

For

Glutathione

by Sunrise Bioresearch· batch GLU1500MAY26-01

COA on file
Aggregated · 3rd-party listing
99.34 %
May 2026
ILS Labs Strong

For

Glutathione

by Ion Peptide· batch GT1500-05042026

Aggregated · 3rd-party listing
99.34 %
May 2026
ILS Labs Strong

For

Glutathione

by Ion Peptide· batch GT1500-05042026

✓ Vendor-published
99.34 %
May 2026
ILS Laboratories

For

Glutathione

by Ion Peptide· batch GT1500-0504028

COA on file
✓ Vendor-published
99.34 %
May 2026
ILS Laboratories

For

Glutathione

by Ion Peptide· batch GT1500-05042026

COA on file
✓ Vendor-published
99.56 %
Apr 2026
Freedom Diagnostics Moderate

For

Glutathione

by Ion Peptide· batch GU600-04222026

COA on file
Aggregated · 3rd-party listing
99.56 %
Apr 2026
Freedom Diagnostics Moderate

For

Glutathione

by Ion Peptide· batch GU600-04222026

Aggregated · 3rd-party listing
99.80 %
Apr 2026
Bioviridian Moderate · HPLC

For

Glutathione

by Prime Peptides· batch 3152026GLU

✓ Vendor-published
99.93 %
Apr 2026
Kovera Labs

For

Glutathione

by Ion Peptide· batch GURAW-04112026

COA on file
Aggregated · 3rd-party listing
99.94 %
Apr 2026
Kovera Labs

For

Glutathione

by Ion Peptide· batch GU750-04042026

✓ Vendor-published
99.94 %
Apr 2026
Kovera Labs

For

Glutathione

by Ion Peptide· batch GU750-04042026

COA on file
Aggregated · 3rd-party listing
99.45 %
Apr 2026
Freedom Diagnostics Moderate · HPLC

For

Glutathione

by Blank Peptides· batch 665394

Aggregated · 3rd-party listing
99.50 %
Apr 2026
Biogenica Labs · HPLC

For

Glutathione

by Amino Club· batch GLT0001

Aggregated · 3rd-party listing
99.92 %
Mar 2026
Kovera Labs

For

Glutathione

by Ion Peptide· batch GU600-03242026

Research depth

20 citations indexed for Glutathione

All research on Glutathione →

review · 2026

Glutathione Supplementation in Parenteral Nutrition to Prevent Oxidative Stress Related Complications in Preterm Infants: A Narrative Review of Preclinical Efficacy and Safety Profile

Numerous adverse effects caused by oxidative stress are commonly observed in preterm infants. This stress is caused by the oxidative burden resulting mainly from supplemental oxygen and parenteral nutrition (PN), and by their precarious antioxidant defense.

animal · 2026

Novelty stressor induces differential brain oxidative stress and antioxidant profiles between proactive and reactive stress coping styles

Neuroendocrine stressors can disrupt the brain's redox equilibrium by generating high levels of reactive oxygen species (ROS) that lead to oxidative stress. To what extent the relationship between neuroendocrine and oxidative stress is modulated by stress coping styles remain unclear.

Study · 2026

Glutathione-related redox imbalance and cognitive impairment in drug-naïve, first-episode schizophrenia: a focus on GSSG

Cognitive impairment is a core feature of schizophrenia, yet the biological basis has not been established. Redox dysregulation has been implicated in cognitive impairment of patients with schizophrenia but evidence in early-stage, drug-naïve patients is limited and inconsistent.

rct · 2026

Formulation-dependent differences in systemic glutathione availability: Comparative pharmacokinetics of orally dissolving film and tablet formulations in healthy adults

Background Glutathione is a tripeptide involved in antioxidant defense; however, its systemic availability following oral administration remains controversial, and pharmacokinetic differences between formulations in humans are not well characterized.

animal · 2026

Genistein Protects Against Lead-Induced Cognitive Impairment Through a Glutathione-Dependent Redox-Mitochondrial Apoptosis Axis

Lead exposure remains a pervasive environmental and public health threat, imposing a substantial burden of neurodevelopmental and cognitive dysfunction, yet safe mechanism-oriented interventions remain limited.

Study · 2026

Integrated multi-omics analysis reveals how PdMYB44 enhances drought tolerance in Pugionium dolabratum by activating the ascorbate-glutathione cycle

Background and aims Oxidative damage caused by drought stress is a key factor limiting crop survival and distribution. The desert plant Pugionium dolabratum exhibits extreme drought tolerance, but its intrinsic antioxidant regulatory mechanism remains unclear.