Which vendors sell Glutathione with independent COA testing?

30 vendors in the Merit Verified directory have independent COA evidence on file for Glutathione — 104 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 27 scored sellers

$0.05/mg

$75.99 · 1500mg · 99.9% purity

5 COAs

Buy code MERIT · 10% off

Best value after code

🇺🇸 Hydro Research Peptides 97

$0.00/mg effective with 15% code

$0.00/mg

$0.95 · 1500mg · 99.2% purity

2 COAs

Buy code MERIT · 15% off

Most tested

🇺🇸 Verified Peptides 87

8 independent COAs on file

$0.03/mg

$48.00 · 1500mg · 98.5% purity

8 COAs

Buy

Average price

$0.06/mg

range $0.00–$0.30/mg

Sellers

from $0.95

45-day trend

+12%

vs 45-day avg $/mg

57 of 70 sellers have a current price· 23 stale hidden· 7 unverified hidden

	Vendor	Price	$/mg	vs avg	Purity	COAs	Merit
🇺🇸	Glacier Aminos ✓ verified at source · just now	$75.99· 1500mg	$0.05/mg	-15.4%	99.9%	5	99	Buy code MERIT · 10% off
🇺🇸	Hydro Research Peptides ✓ verified at source · just now	$0.95· 1500mg	$0.00/mg	-98.9%	99.2%	2	97	Buy code MERIT · 15% off
🇺🇸	Reta One Labs ✓ verified at source · just now	$34.00· 1500mg	$0.02/mg	-62.2%	99.9%	1	95	Buy affiliate
🇺🇸	Prime Peptides ✓ verified at source · just now	$80.00· 1500mg	$0.05/mg	-11%	99.8%	1	95	Buy
🇺🇸	Licensed Peptides ✓ verified at source · just now	$91.99· 600mg	$0.15/mg	+156%	—	—	95	Buy code MERIT · 5% off
🇺🇸	Forge Performance Co. ✓ verified at source · just now	$60.00· 1500mg	$0.04/mg	-33.2%	—	—	94	Buy code MERIT · 10% off
	Nova Peptides ✓ verified at source · just now	$49.99· 600mg	$0.08/mg	+39.1%	99.0%	2	94	Buy
🇺🇸	Ignite Peptides ✓ verified at source · just now	$45.00· 750mg	$0.06/mg	+0.2%	99.6%	1	93	Buy code MERIT · 10% off
🇺🇸	Polaris Peptides ✓ verified at source · just now	$60.00· 600mg	$0.10/mg	+66.9%	—	—	90	Buy
🇺🇸	Peptide Plugs ✓ verified at source · just now	$50.00· 1500mg	$0.03/mg	-44.4%	99.9%	2	89	Buy

Top Merit pick

🇺🇸 Glacier Aminos
✓ verified at source · just now
99

$0.05/mg -15.4% vs avg

$75.99

1500mg

99.9% purity 5 COAs

Buy code MERIT · 10% off
🇺🇸 Hydro Research Peptides
✓ verified at source · just now
97

$0.00/mg -98.9% vs avg

$0.95

1500mg

99.2% purity 2 COAs

Buy code MERIT · 15% off
🇺🇸 Reta One Labs
✓ verified at source · just now
95

$0.02/mg -62.2% vs avg

$34.00

1500mg

99.9% purity 1 COA

Buy affiliate
🇺🇸 Prime Peptides
✓ verified at source · just now
95

$0.05/mg -11% vs avg

$80.00

1500mg

99.8% purity 1 COA

Buy
🇺🇸 Licensed Peptides
✓ verified at source · just now
95

$0.15/mg +156% vs avg

$91.99

600mg

no purity

Buy code MERIT · 5% off
🇺🇸 Forge Performance Co.
✓ verified at source · just now
94

$0.04/mg -33.2% vs avg

$60.00

1500mg

no purity

Buy code MERIT · 10% off
Nova Peptides
✓ verified at source · just now
94

$0.08/mg +39.1% vs avg

$49.99

600mg

99.0% purity 2 COAs

Buy
🇺🇸 Ignite Peptides
✓ verified at source · just now
93

$0.06/mg +0.2% vs avg

$45.00

750mg

99.6% purity 1 COA

Buy code MERIT · 10% off
🇺🇸 Polaris Peptides
✓ verified at source · just now
90

$0.10/mg +66.9% vs avg

$60.00

600mg

no purity

Buy
🇺🇸 Peptide Plugs
✓ verified at source · just now
89

$0.03/mg -44.4% vs avg

$50.00

1500mg

99.9% 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

104 third-party tests across 30 vendors. Each card links to the full report.

All 104 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 Biology in Neurodegenerative and Metabolic Diseases: Molecular Mechanisms, Pathophysiological Roles, and Therapeutic Perspectives

The Role of Cellular Glutathione Redox Cycle and Glutathione in the Regulation of Ileum Contractility

Zinc tolerance through glutathione import strikes a fine balance between protection and damage in &lt;i&gt;Streptococcus mutans&lt;/i&gt;

Glutathione S-Transferase Omega 1 Promotes Macrophage Inflammation-Associated Coagulopathy in Sepsis by S-Glutathionylating ANXA5 to Enhance Its Ubiquitination

Ferroptosis-Based Nanotherapy for Pancreatic Ductal Adenocarcinoma Through Glutathione Depletion and Iron Accumulation

&lt;b&gt;Astragaloside IV attenuates high glucose-induced podocyte ferroptosis via the GSK3β/Nrf2/GPX4 pathway&lt;/b&gt;

Zinc tolerance through glutathione import strikes a fine balance between protection and damage in <i>Streptococcus mutans</i>

<b>Astragaloside IV attenuates high glucose-induced podocyte ferroptosis via the GSK3β/Nrf2/GPX4 pathway</b>