Which vendors sell Thymalin with independent COA testing?

5 vendors in the Merit Verified directory have independent COA evidence on file for Thymalin — 21 COAs total. COA coverage and test dates are listed on the Thymalin page at https://meritverified.org/peptides/thymalin.

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

To verify Thymalin 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 Thymalin at https://meritverified.org/peptides/thymalin so you can compare evidence across vendors before buying.

What is the regulatory status of Thymalin?

Thymalin 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 Thymalin in your jurisdiction.

Immune Modulator

Thymalin

Also known as: thymalinum

Thymalin is a heterogeneous polypeptide extract from calf thymus (a mixture, not a single defined peptide) developed in the 1970s by V. Kh. Khavinson and V. G. Morozov at the Military Medical Academy / St. Petersburg Institute of Bioregulation and Gerontology. Registered as a pharmaceutical in the USSR/Russia for immunocorrection. Distinct from Thymulin (Bach's zinc-dependent nonapeptide pGlu-Ala-Lys-Ser-Gln-Gly-Gly-Ser-Asn, originally called FTS) and from Thymosin alpha-1 (a 28-amino-acid synthetic peptide). Not FDA-approved in the US; research-use only.

Real-time market data

Pricing for Thymalin

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

$4.68/mg

range $1.52–$6.50/mg

Sellers

from $0.00

45-day trend

+0.7%

vs 45-day avg $/mg

24 of 27 sellers have a current price· 14 stale listings hidden (not seen in 7 days)

	Vendor	Price	$/mg	vs avg	Purity	COAs	Merit
🇺🇸	Profound Aminos via Disclosed Labs · just now	$54.00· 10mg	$5.40/mg	+15.3%	99.2%	1	95
🇺🇸	Ion Peptide ✓ verified at source · just now	$59.00· 10mg	$5.90/mg	+26%	99.2%	2	95
🇺🇸	Peptide Tech ✓ verified at source · 1d ago	$39.99· 20mg	$2.00/mg	-57.3%	—	—	94	Buy
🇺🇸	Peptide Plugs ✓ verified at source · just now	$50.00· 20mg	$2.50/mg	-46.6%	—	—	89
🇺🇸	Peptidology ✓ verified at source · just now	$54.00· 10mg	$5.40/mg	+15.3%	99.8%	2	89	Buy
🇺🇸	Verified Peptides via Disclosed Labs · just now	$36.00· 10mg	$3.60/mg	-23.1%	99.8%	13	86	Buy
🇭🇰	zztai Peptide Ltd ✓ verified at source · just now	$64.00· 10mg	$6.40/mg	+36.6%	—	—	43
	peptidetech.is via Disclosed Labs · just now	$39.99· 20mg	$2.00/mg	-57.3%	—	—	Unscored
🇺🇸	Kimera Chems via Disclosed Labs · just now	$41.99· 10mg	$4.20/mg	-10.4%	—	—	Unscored
	realpeptides.co via Disclosed Labs · just now	$60.00· 10mg	$6.00/mg	+28.1%	—	—	Unscored

Top Merit pick

🇺🇸 Profound Aminos
via Disclosed Labs · just now
95

$5.40/mg +15.3% vs avg

$54.00

10mg

99.2% purity 1 COA
🇺🇸 Ion Peptide
✓ verified at source · just now
95

$5.90/mg +26% vs avg

$59.00

10mg

99.2% purity 2 COAs
🇺🇸 Peptide Tech
✓ verified at source · 1d ago
94

$2.00/mg -57.3% vs avg

$39.99

20mg

no purity

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

$2.50/mg -46.6% vs avg

$50.00

20mg

no purity
🇺🇸 Peptidology
✓ verified at source · just now
89

$5.40/mg +15.3% vs avg

$54.00

10mg

99.8% purity 2 COAs

Buy
🇺🇸 Verified Peptides
via Disclosed Labs · just now
86

$3.60/mg -23.1% vs avg

$36.00

10mg

99.8% purity 13 COAs

Buy
🇭🇰 zztai Peptide Ltd
✓ verified at source · just now
43

$6.40/mg +36.6% vs avg

$64.00

10mg

no purity
peptidetech.is
via Disclosed Labs · just now
Unscored

$2.00/mg -57.3% vs avg

$39.99

20mg

no purity
🇺🇸 Kimera Chems
via Disclosed Labs · just now
Unscored

$4.20/mg -10.4% vs avg

$41.99

10mg

no purity
realpeptides.co
via Disclosed Labs · just now
Unscored

$6.00/mg +28.1% vs avg

$60.00

10mg

no purity

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 Thymalin

21 third-party tests across 5 vendors. Each card links to the full report.

All 21 COAs for Thymalin →

Measured purity over time

Thymalin

Pricing for Thymalin

COAs for Thymalin

12 citations indexed for Thymalin

Targeting Leukopoiesis: Pharmacological and Biotechnological Strategies for the Treatment of Leukopenia

Rerouting therapeutic peptides and unlocking their potential against SARS-CoV2

Reparative osteogenesis in mandible in cases of filling a bone defect with hydroxyapatite-containing osteotropic material and injecting the surrounding soft tissues with thymalin: experimental and morphological study

Expression features of T-lymphocytes, B-lymphocytes and macrophages in the post-traumatic regenerate of the mandible rats under conditions of filling a bone defect with hydroxyapatite-containing osteotropic material and thymalin injecting the surrounding soft tissues

The Influence of KE and EW Dipeptides in the Composition of the Thymalin Drug on Gene Expression and Protein Synthesis Involved in the Pathogenesis of COVID-19

[Morphological compound and indicators of the blood clotting system in severe COVID-19 patients of middle aged and elderly during treatment of Tocilizumab and Thymalin.]