Which vendors sell Glutathione with independent COA testing?

19 vendors in the Merit Verified directory have independent COA evidence on file for Glutathione — 83 COAs total. COA coverage and test dates are listed on the Glutathione page at https://meritverified.org/peptides/glutathione.

How do I verify the quality of Glutathione from a vendor?

To verify Glutathione quality, look for an independent certificate of analysis (COA) from a third-party lab — not a lab the vendor owns or pays directly. The COA should state the tested compound, lot number, purity percentage (identity and concentration), and the lab's name. Cross-reference the lot number against the vendor's current stock. Merit Verified indexes COAs for Glutathione at https://meritverified.org/peptides/glutathione so you can compare evidence across vendors before buying.

What is the regulatory status of Glutathione?

Glutathione is tracked in the Merit Verified registry. Regulatory status for research peptides in the US has been evolving — the FDA has reclassified a number of peptides out of the 503A compounding ingredient list since 2025. Merit Verified does not provide legal or regulatory advice; check official FDA sources or consult a licensed professional for the current status of Glutathione in your jurisdiction.

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.

Where to buy · live market data

Who's worth your money for Glutathione

Every current seller, ranked by independent evidence — Merit Score, latest COA purity, and live $/mg (size-normalized). Prices refresh daily. Rankings are never paid.

Top Merit pick

🇺🇸 Glacier Aminos 99

Highest Merit Score (99) of 15 scored sellers

$0.05/mg

$75.99 · 1500mg · 99.9% purity

5 COAs

Buy code MERIT · 10% off

Best value

Peptide Supply Co. 83

Lowest $/mg among scored sellers

$0.02/mg

$350 · 15000mg · 99.0% purity

2 COAs

Buy

Most tested

🇺🇸 Verified Peptides 86

7 independent COAs on file

$0.05/mg

$79.99 · 1500mg · 99.0% purity

7 COAs

Buy

Average price

$0.06/mg

range $0.02–$0.30/mg

Sellers

from $25.00

45-day trend

+12.2%

vs 45-day avg $/mg

52 of 65 sellers have a current price· 16 stale hidden· 21 unverified hidden

	Vendor	Price	$/mg	vs avg	Purity	COAs	Merit
🇺🇸	Glacier Aminos ✓ verified at source · 23h ago	$75.99· 1500mg	$0.05/mg	-18%	99.9%	5	99	Buy code MERIT · 10% off
🇺🇸	Prime Peptides ✓ verified at source · 23h ago	$65.00· 1500mg	$0.04/mg	-29.9%	99.8%	1	95	Buy
🇺🇸	Orbitrex Peptides via Disclosed Labs · 23h ago	$69.99· 1500mg	$0.05/mg	-24.5%	99.7%	2	95	Buy code Orbitrex10 · 10% off
🇺🇸	Peptide Tech ✓ verified at source · 23h ago	$69.99· 1500mg	$0.05/mg	-24.5%	—	—	94	Buy
🇺🇸	Ignite Peptides ✓ verified at source · 23h ago	$35.00· 750mg	$0.05/mg	-24.5%	—	—	92	Buy code MERIT · 10% off
🇺🇸	Hydro Research Peptides ✓ verified at source · 23h ago	$95.00· 1500mg	$0.06/mg	+2.5%	99.2%	2	91	Buy code MERIT · 15% off
🇺🇸	Peptide Plugs ✓ verified at source · 23h ago	$50.00· 1500mg	$0.03/mg	-46.1%	99.6%	1	89	Buy
🇺🇸	Sunrise Bioresearch via Disclosed Labs · 23h ago	$41.44· 1500mg	$0.03/mg	-55.3%	99.3%	4	88	Buy
🇺🇸	Verified Peptides via Disclosed Labs · 23h ago	$79.99· 1500mg	$0.05/mg	-13.7%	99.0%	7	86	Buy
	Peptide Supply Co. via Disclosed Labs · 23h ago	$350· 15000mg	$0.02/mg	-62.2%	99.0%	2	83	Buy

Top Merit pick

🇺🇸 Glacier Aminos
✓ verified at source · 23h ago
99

$0.05/mg -18% vs avg

$75.99

1500mg

99.9% purity 5 COAs

Buy code MERIT · 10% off
🇺🇸 Prime Peptides
✓ verified at source · 23h ago
95

$0.04/mg -29.9% vs avg

$65.00

1500mg

99.8% purity 1 COA

Buy
🇺🇸 Orbitrex Peptides
via Disclosed Labs · 23h ago
95

$0.05/mg -24.5% vs avg

$69.99

1500mg

99.7% purity 2 COAs

Buy code Orbitrex10 · 10% off
🇺🇸 Peptide Tech
✓ verified at source · 23h ago
94

$0.05/mg -24.5% vs avg

$69.99

1500mg

no purity

Buy
🇺🇸 Ignite Peptides
✓ verified at source · 23h ago
92

$0.05/mg -24.5% vs avg

$35.00

750mg

no purity

Buy code MERIT · 10% off
🇺🇸 Hydro Research Peptides
✓ verified at source · 23h ago
91

$0.06/mg +2.5% vs avg

$95.00

1500mg

99.2% purity 2 COAs

Buy code MERIT · 15% off
🇺🇸 Peptide Plugs
✓ verified at source · 23h ago
89

$0.03/mg -46.1% vs avg

$50.00

1500mg

99.6% purity 1 COA

Buy
🇺🇸 Sunrise Bioresearch
via Disclosed Labs · 23h ago
88

$0.03/mg -55.3% vs avg

$41.44

1500mg

99.3% purity 4 COAs

Buy
🇺🇸 Verified Peptides
via Disclosed Labs · 23h ago
86

$0.05/mg -13.7% vs avg

$79.99

1500mg

99.0% purity 7 COAs

Buy
Peptide Supply Co.
via Disclosed Labs · 23h ago
83

$0.02/mg -62.2% vs avg

$350

15000mg

99.0% purity 2 COAs

Buy

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.

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Compound reference

About Glutathione

CAS

70-18-8

Molecular formula

C10H17N3O6S

Sequence

ECG

Typical dose range

IV: 600–1200 mg per session (1–3x/week); oral: 250–500 mg/day

Half-life

~10–14 minutes (plasma, IV); cellular retention 24–72 hours post-dose

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 over time

Glutathione

Who's worth your money for Glutathione

Watch Glutathione

About Glutathione

COAs for Glutathione

20 citations indexed for Glutathione

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

Reprogramming Glutathione-Binding Proteins into Artificial Photoenzymes by Engineered Glutathione-Type Cofactors

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

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

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

[In old age, female prematurely aging mice - who show lower antioxidant defenses than their controls in adulthood - reach similar defense levels but maintain higher oxidation]