TB-500 lab tests

428 certificates of analysis for TB-500 are on file — 413 for single vials and 15 for blends and other forms — from 216 shops and 23 labs. The latest was tested on 6 Oct 2026.

These are certificates shops have chosen to publish, verified for authenticity before listing. Because shops decide which COAs to make public, the set reflects the batches they published rather than every production batch — a selection bias we state openly. What shop COAs show →

Tests on file

428

413 single vials · 15 blends & other forms

Median purity

99.48%

usual 99.00–99.87% · shop COAs

Measured vs label

107%

median · 8 under 90% · 52 over 120%

Latest test

6 Oct 2026

23 labs · 216 shops

Look up your vial's lot →TB-500 prices →TB-500 calculator Get a vial tested

What TB-500 results look like

single vials only · 412 purity results · 407 measured-content results

Purity is tightly bunched: the middle 80% of results sit within 0.9 points. Measured content spreads across 25 points of the label.

HPLC purity

99.00–99.87%middle 80% of results

median 99.48%91% at 99% or higher7 under 98%

% HPLC purity

Measured content vs label

98–123%middle 80% of results

median 107%8 under 90%52 over 120%

% of the labelled amount

outside the usual rangeEndotoxin reported on 58 of 413 (14%)Confirmed on the lab's own portal: 92 (22%)Most tested size: 10 mg (289), then 5 mg (95)

Latest TB-500 tests

10 most recent · all formsAll 428 ↓

Latest TB-500 lab tests
Tested	Shop	Lab	Purity	Measured vs label	Endotoxin	Record
6 Oct 2026	BatchTest Labs Peptides	Uzorak	98.81%	12.11 / 10 mg 121% of label	—	BT10-20260929-01✓
21 Sep 2026	Rogue Compounds	ILS Laboratories	99.69%	10.41 / 10 mg 104% of label	—	TB-260808-001✓
18 Sep 2026	Lobster Peptides	Uzorak	99.42%	11.07 / 10 mg 111% of label	—	View record →
9 Sep 2026	Pepspan	Janoshik Labs	98.45%	4.77 / 5 mg 95% of label	—	PEP-TB500-2608-01✓
28 Aug 2026	Pepta EU	Janoshik Labs	98.59%	10.27 / 10 mg 103% of label	—	MG26052511✓
21 Aug 2026	Alchemy Gold Research	Janoshik Labs	99.95%	10.6 / 10 mg 106% of label	—	0000001✓
19 Aug 2026	Coastal Peptides	Kovera Labs	99.71%	10.54 / 10 mg 105% of label	—	TB500-10-001✓
7 Aug 2026	Elyria Bio	ILS Laboratories	99.70%	10.6 / 10 mg 106% of label	—	030371✓
4 Aug 2026	Biotech Compounds	Bioviridian	99.81%	10.62 / 10 mg 106% of label	—	202609-01-BT✓
3 Aug 2026	BioEdge Research Labs	Kovera Labs	99.69%	11.5 / 10 mg 115% of label	Pass	062026TB10✓

98% or higher95–98%90–95%under 90%✓ found on the lab's own portalHover an endotoxin chip for the lab's exact wording

Results by lab

single vials · labs with the most TB-500 tests

TB-500 single-vial results by testing lab
Lab	Tests	Median purity	Median measured vs label	Endotoxin reported	Confirmed on lab portal
Janoshik Labs	130	99.49%	108%	0	22
freedomdiagnosticstesting.com	105	99.27%	110%	17	35
Horizon Analytical	21	99.34%	102%	0	0
Vanguard Laboratory	20	99.80%	105%	4	1
Chromate	18	99.22%	107%	2	4
Kovera Labs	14	99.70%	114%	9	11
Ethos Analytics	11	99.00%	104%	4	0
ILS Laboratories	11	99.81%	105%	4	7

Differences reflect the vials each lab received and how it reports — this is not a ranking of labs. Every lab with a TB-500 test on file is linked under More on TB-500.

What TB-500 testing has to rule out

TB-500 is a synthetic seven-residue fragment, Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln (Ac-LKKTETQ), CAS 885340-08-9 (PubChem CID 62707662), formula C₃₈H₆₈N₁₀O₁₄, molecular weight 889.01 Da. It corresponds to residues 17–23 of thymosin β4, a 43-amino-acid endogenous protein (CAS 77591-33-4, formula C₂₁₂H₃₅₀N₅₆O₇₈S, 4,963.44 Da, UniProt P62328), and is formally designated Ac-Tβ4(17-23). The two are sold interchangeably under both names, which is why this platform keeps them on separate compound pages, so that certificates for one molecule are not pooled with the other.

The masses differ by 4,074 Da — far easier to resolve than the 16 Da separating other commonly conflated pairs — so any mass spectrometer shows which molecule arrived, and there is no technical excuse for a vendor not knowing which compound it is shipping. A certificate reporting only a purity percentage has said nothing about identity.

Most research cited on TB-500 product pages was done on the parent protein. A 2026 scoping review included 80 studies, of which 70 were on thymosin β4 and exactly one was a direct TB-500 study, a metabolite-profiling and fibroblast-screening exercise. Cardiac repair, angiogenesis, wound healing and the ophthalmic programme belong to thymosin β4; the landmark cardiac paper, Bock-Marquette et al. (Nature, 2004 — frequently miscited as Nature Medicine 2003), studied the parent protein. A listing that quotes it under a TB-500 heading has shown its own conflation before anything is opened.

TB-500 is commonly sold blended with BPC-157, and a blend vial carries no separate identity result for either component unless the certificate reports both masses.

Mass near 889 Da (TB-500), not near 4,963 Da (thymosin β4), on a batch-matched certificate.
The CAS on the label: 885340-08-9 is TB-500, 77591-33-4 is thymosin β4. Neither number, or one matching neither compound, means the listing was assembled from other listings.
The sequence and acetyl cap on the spec sheet: a 43-residue sequence under a TB-500 heading is the parent protein, and an unacetylated seven-mer is not the compound the market means by TB-500 either.
The research the product page cites: cardiac, angiogenic and ophthalmic results are thymosin β4 results.

All TB-500 tests

429 records · 1 supplier-provided, listed and left out of the benchmarks · page 1 of 2 · newest first · blends tagged

Records 1–300 of 429 · 1 supplier-provided, listed and left out of the benchmarks, most recent first.
Tested	Shop	Lab	Purity	Measured vs label	Endotoxin	Record
6 Oct 2026	BatchTest Labs Peptides	Uzorak	98.81%	12.11 / 10 mg 121% of label	—	BT10-20260929-01✓
21 Sep 2026	Rogue Compounds	ILS Laboratories	99.69%	10.41 / 10 mg 104% of label	—	TB-260808-001✓
18 Sep 2026	Lobster Peptides	Uzorak	99.42%	11.07 / 10 mg 111% of label	—	View record →
9 Sep 2026	Pepspan	Janoshik Labs	98.45%	4.77 / 5 mg 95% of label	—	PEP-TB500-2608-01✓
28 Aug 2026	Pepta EU	Janoshik Labs	98.59%	10.27 / 10 mg 103% of label	—	MG26052511✓
21 Aug 2026	Alchemy Gold Research	Janoshik Labs	99.95%	10.6 / 10 mg 106% of label	—	0000001✓
19 Aug 2026	Coastal Peptides	Kovera Labs	99.71%	10.54 / 10 mg 105% of label	—	TB500-10-001✓
7 Aug 2026	Elyria Bio	ILS Laboratories	99.70%	10.6 / 10 mg 106% of label	—	030371✓
4 Aug 2026	Biotech Compounds	Bioviridian	99.81%	10.62 / 10 mg 106% of label	—	202609-01-BT✓
3 Aug 2026	BioEdge Research Labs	Kovera Labs	99.69%	11.5 / 10 mg 115% of label	Pass	062026TB10✓
31 Jul 2026	PeptuviaSupplier-provided	freedomdiagnosticstesting.com	99.54%	9.95 / 10 mg 99% of label	—	2026071510✓
28 Jul 2026	Zen Aminos	freedomdiagnosticstesting.com	99.84%	12.67 / 10 mg 127% of label	—	ZAP-TB503✓
27 Jul 2026	High Tide Compounds	Kovera Labs	99.63%	10.3 / 10 mg 103% of label	Pass	TB10-002✓
26 Jul 2026	Idun Peptides	Kovera Labs	99.65%	12.58 / 10 mg 126% of label	Pass	TB10-260717✓
22 Jul 2026	Core Peptides	Vanguard Laboratory	99.98%	10 / 10 mg 100% of label	—	C74180
22 Jul 2026	Core Peptides	Vanguard Laboratory	99.98%	5 / 5 mg 100% of label	—	C74179
17 Jul 2026	GenPeptide	Kovera Labs	99.19%	11.76 / 10 mg 118% of label	—	GPTB10070726✓
16 Jul 2026	Peptide Plugs	freedomdiagnosticstesting.com	99.33%	13.91 / 10 mg 139% of label	Pass	101-08-2B✓
15 Jul 2026	Biotech Peptides	MZ Biolabs	99.83%	10 / 10 mg 100% of label	—	3141080
15 Jul 2026	Biotech Peptides	MZ Biolabs	99.72%	5 / 5 mg 100% of label	—	3141081
13 Jul 2026	Pure Amino	ILS Laboratories	99.55%	10.53 / 10 mg 105% of label	Reported	PA25060201✓
11 Jul 2026	TriVial BioWorks	Kovera Labs	99.44%	11.61 / 10 mg 116% of label	Pass	TB10-0705✓
9 Jul 2026	Apexx Biolabs	freedomdiagnosticstesting.com	99.95%	13.47 / 10 mg 135% of label	—	Yellow Cap-2✓
9 Jul 2026	Revitalized Research	Horizon Analytical	99.34%	10.15 / 10 mg 102% of label	—	RRL-8408241-P
9 Jul 2026	Revitalized Research	Horizon Analytical	99.50%	4.9 / 5 mg 98% of label	—	RRL-7021946-P
9 Jul 2026	Ascend Science	Kovera Labs	99.52%	10.7 / 10 mg 107% of label	Pass	C33H54N9O09✓
7 Jul 2026	NuVion Health	Janoshik Labs	99.91%	10.33 / 10 mg 103% of label	—	View record →
6 Jul 2026	My Amino Lab	Kovera Labs	99.84%	4.96 / 5 mg 99% of label	—	V2606-TB5-2401✓
6 Jul 2026	Modified Aminos	Ethos Analytics	99.00%	10.12 / 10 mg 101% of label	Pass	MA-TBS1-100
2 Jul 2026	Ameano Peptides	Janoshik Labs	99.92%	11.38 / 10 mg 114% of label	—	TBF1006172026-06✓
29 Jun 2026	Elevated Peptides	MZ Biolabs	99.67%	not reported	—	2026-06-22
29 Jun 2026	Elevated Peptides	MZ Biolabs	99.04%	not reported	—	2026-06-22
27 Jun 2026	Revitalized Research	Horizon Analytical	99.27%	9.88 / 10 mg 99% of label	—	RRL-6055127-P
27 Jun 2026	Revitalized Research	Horizon Analytical	99.48%	9.92 / 10 mg 99% of label	—	RRL-4944656-P
27 Jun 2026	Humatide Peptides	ILS Laboratories	99.76%	10.72 / 10 mg 107% of label	—	H10TB5060126
25 Jun 2026	Corix Labs	Janoshik Labs	97.51%	10.71 / 10 mg 107% of label	—	TB500 - 06/26✓
24 Jun 2026	Nova Labs	Uzorak	99.18%	9.42 / 10 mg 94% of label	—	View record →
22 Jun 2026	Veratis Bio Peptides	freedomdiagnosticstesting.com	99.19%	11.08 / 10 mg 111% of label	—	TB5260618A✓
22 Jun 2026	Meipeptide	Janoshik Labs	99.07%	11.66 / 10 mg 117% of label	—	View record →
19 Jun 2026	Ktechpeptide	Janoshik Labs	99.10%	10.56 / 10 mg 106% of label	—	2026-6✓
19 Jun 2026	Synova Supply	Horizon Analytical	99.46%	10.15 / 10 mg 102% of label	—	SS-1698961-P
15 Jun 2026	Oasis Labs	Bioviridian	99.90%	10.57 / 10 mg 106% of label	—	112455✓
14 Jun 2026	Nura Peptide	freedomdiagnosticstesting.com	99.35%	11.62 / 10 mg 116% of label	Pass	TB-062026-1✓
12 Jun 2026	Excalibur Peptides	freedomdiagnosticstesting.com	99.33%	11.53 / 10 mg 115% of label	—	View record →
11 Jun 2026	24Peptides	liquilabs	99.70%	12.85 / 10 mg 129% of label	Pass	GF-TB5010-B241
9 Jun 2026	EZ Peps	ILS Laboratories	99.81%	10.67 / 10 mg 107% of label	—	26-M5-10TB / BT10050126-1✓
8 Jun 2026	Protide Health	freedomdiagnosticstesting.com	99.30%	11.28 / 10 mg 113% of label	Pass	CS-tb-10-0011
7 Jun 2026	Global Aminos	freedomdiagnosticstesting.com	98.86%	9.67 / 10 mg 97% of label	—	View record →
5 Jun 2026	PeptideTech	freedomdiagnosticstesting.com	99.16%	10.66 / 10 mg 107% of label	Pass	TB10-8810✓
4 Jun 2026	Optimum Formula	ILS Laboratories	99.90%	10.31 / 10 mg 103% of label	Reported	#ERN51✓
4 Jun 2026	Peptide Minds	freedomdiagnosticstesting.com	99.18%	13.31 / 10 mg 133% of label	Pass	PMINDS632614✓
4 Jun 2026	Research Chem HQ	ILS Laboratories	99.90%	10.31 / 10 mg 103% of label	Reported	#ERN51✓
2 Jun 2026	Ascension Peptides	Kovera Labs	99.67%	5.97 / 5 mg 119% of label	Pass	31-05260628✓
29 May 2026	Umbrella Labs	Vanguard Laboratory	99.80%	9.84 / 10 mg 98% of label	—	ULP-34008
29 May 2026	Peptide Maxxing	freedomdiagnosticstesting.com	99.06%	9.05 / 10 mg 91% of label	—	TBS339✓
29 May 2026	Alyve Peptides	freedomdiagnosticstesting.com	99.06%	9.05 / 10 mg 91% of label	—	TBS339✓
29 May 2026	Oneday Compounds	ILS Laboratories	99.79%	10.48 / 10 mg 105% of label	—	OC-TB10-103✓
29 May 2026	EVO Labs ResearchBlendTB-500/BPC-157/KPV/GHK-Cu	Kovera Labs	99.75%	87.64 / 80 mg 110% of label	—	EVO5212026
28 May 2026	Peptide Partners	TrustPointe Analytics	99.77%	9.75 / 10 mg 98% of label	—	View record →
28 May 2026	S1 Research	Kovera Labs	99.72%	11.8 / 10 mg 118% of label	Pass	TB051026S1✓
28 May 2026	Adria Science	liquilabs	98.60%	12.38 / 10 mg 124% of label	—	2025289
27 May 2026	Good Science	Vanguard Laboratory	99.41%	10.57 / 10 mg 106% of label	Pass	3548411
27 May 2026	Midshire Labs (formerly Regen Peptides)	Janoshik Labs	96.84%	4.83 / 5 mg 97% of label	—	LI20260404BT5
26 May 2026	Maple Research Labs	Testides	98.62%	9.84 / 10 mg 98% of label	—	View record →
26 May 2026	Crystal Peptides	Janoshik Labs	99.93%	10.17 / 10 mg 102% of label	—	TB1045Cp✓
26 May 2026	Kimera Chems	Vanguard Laboratory	99.02%	4.98 / 5 mg 100% of label	—	KC-TB5-ORG1
25 May 2026	Curo	BTLabs	99.60%	6 / 5 mg 120% of label	—	TB50SR526
25 May 2026	Midshire Labs (formerly Regen Peptides)	Janoshik Labs	99.02%	10.62 / 10 mg 106% of label	—	LI20260514TB10
24 May 2026	Elutide	Horizon Analytical	99.46%	10.15 / 10 mg 102% of label	—	E-1698961-P
21 May 2026	Signum Scientific	Horizon Analytical	99.40%	10.25 / 10 mg 102% of label	—	SS-5928420-P
20 May 2026	Zen Aminos	freedomdiagnosticstesting.com	99.71%	11.95 / 10 mg 119% of label	—	ZAP-TBS02
19 May 2026	True Research Labs	Horizon Analytical	99.50%	4.9 / 5 mg 98% of label	—	TRL-7021946
19 May 2026	Proforma PeptidesBlendTB-500/BPC-157	Analiza Białek	99.00%	21.36 / 20 mg 107% of label	—	2069
18 May 2026	Janera Science	Vanguard Laboratory	99.80%	5.23 / 5 mg 105% of label	—	TB500-5-0426-01
18 May 2026	PurgoLabs Peptides	freedomdiagnosticstesting.com	99.89%	11.08 / 10 mg 111% of label	—	PL-TB-02✓
16 May 2026	GenPeptide	freedomdiagnosticstesting.com	99.77%	12.65 / 10 mg 127% of label	—	GPTB10050926✓
14 May 2026	Drakon Peptides	Janoshik Labs	97.75%	10.15 / 10 mg 102% of label	—	DRK-TB5-MAY26✓
13 May 2026	Warrior Makers	MZ Biolabs	99.91%	not reported	—	11247-SG5
12 May 2026	True Research Labs	Horizon Analytical	99.46%	10.15 / 10 mg 102% of label	—	TRL-1698961
12 May 2026	True Research Labs	Horizon Analytical	99.16%	10.1 / 10 mg 101% of label	—	TRL-9377026
12 May 2026	LA Peptides	Bioviridian	99.80%	10.98 / 10 mg 110% of label	Pass	1218
12 May 2026	Modern Research Peptides	freedomdiagnosticstesting.com	99.20%	9.76 / 10 mg 98% of label	—	BCE1527169✓
11 May 2026	Peptify UK	Janoshik Labs	98.70%	5.22 / 5 mg 104% of label	—	2026/04
10 May 2026	NG Peptide	ILS Laboratories	99.87%	20.55 / 20 mg 103% of label	—	TB20-5
9 May 2026	Puratek Peptides	freedomdiagnosticstesting.com	99.56%	11.13 / 10 mg 111% of label	Pass	TB510003✓
8 May 2026	Synthesis Peptides	freedomdiagnosticstesting.com	99.12%	11.25 / 10 mg 113% of label	—	View record →
8 May 2026	Valor PeptidesBlendTB-500/Thymosin Beta-4/BPC-157	Accumark Labs	99.31%	24.78 / 10 mg 248% of labelCheck label	—	ARC-WV10-002
6 May 2026	NG Peptide	ILS Laboratories	99.85%	10.5 / 10 mg 105% of label	—	TB10-07
6 May 2026	Pure Health Peptides	Ethos Analytics	99.00%	10.23 / 10 mg 102% of label	—	TUY-040126
5 May 2026	Honest Peptide	freedomdiagnosticstesting.com	99.35%	12.15 / 10 mg 122% of label	—	BT1004272026✓
4 May 2026	BioGlow	freedomdiagnosticstesting.com	99.10%	10.68 / 10 mg 107% of label	Pass	BG-102✓
4 May 2026	24Peptides	liquilabs	99.60%	25 / 20 mg 125% of label	Pass	GF-TB5020-B241
3 May 2026	Real Peptides	freedomdiagnosticstesting.com	99.22%	10.9 / 10 mg 109% of label	—	View record →
1 May 2026	Alpha Peptides	Analytical Formulations Inc	99.90%	12.26 / 10 mg 123% of label	—	TB-42326428
29 Apr 2026	Neopeps	Janoshik Labs	98.02%	5.19 / 5 mg 104% of label	—	View record →
26 Apr 2026	Research Chem HQ	Kovera Labs	99.86%	10.61 / 10 mg 106% of label	Pass	#GN45U✓
26 Apr 2026	Midwest Peptide	freedomdiagnosticstesting.com	99.11%	9.39 / 10 mg 94% of label	—	MPTB001
25 Apr 2026	Idun Peptides	freedomdiagnosticstesting.com	99.10%	10.66 / 10 mg 107% of label	—	TB10-260331✓
24 Apr 2026	Verified Peptides	Janoshik Labs	99.70%	11.8 / 12 mg 98% of label	—	TB04260910I
23 Apr 2026	Offline Peptides	freedomdiagnosticstesting.com	99.31%	5.96 / 5 mg 119% of label	—	OP-BT5-0426✓
23 Apr 2026	Midshire Labs (formerly Regen Peptides)	Janoshik Labs	99.56%	22.72 / 20 mg 114% of label	—	TB420-0408
22 Apr 2026	Riptide Wellness	ILS Laboratories	99.86%	10.49 / 10 mg 105% of label	Pass	RWTB-10-1002
22 Apr 2026	Peptide Plugs	freedomdiagnosticstesting.com	99.14%	10.9 / 10 mg 109% of label	—	122-A-5
21 Apr 2026	Enhanced Peptides	Vanguard Laboratory	99.60%	5.18 / 5 mg 104% of label	—	TB4-5-421
21 Apr 2026	Saiyan Med	Janoshik Labs	99.72%	11.3 / 10 mg 113% of label	—	SYM-TB-B2604✓
21 Apr 2026	Peptide PartnersBlendTB-500/BPC-157/KPV/GHK-Cu	Kovera Labs	99.86%	83.62 / 80 mg 105% of label	Pass	KW202604
19 Apr 2026	Vertex Labs	BTLabs	99.70%	10.2 / 10 mg 102% of label	—	TB0000030
19 Apr 2026	Instant PeptidesBlendTB-500/BPC-157/KPV/GHK-Cu	Kovera Labs	99.86%	84.87 / 80 mg 106% of label	—	2026-0270-C
19 Apr 2026	Instant PeptidesBlendTB-500/BPC-157/KPV/GHK-Cu	Kovera Labs	99.96%	84.96 / 80 mg 106% of label	—	2026-0270-C
17 Apr 2026	EZ Peptides	Janoshik Labs	99.88%	9.86 / 10 mg 99% of label	—	EZP-TBF1004082026-04✓
15 Apr 2026	NextEdge Peptides	Janoshik Labs	99.03%	4.62 / 5 mg 92% of label	—	TB5-91904✓
15 Apr 2026	Disguised Alpha	Chromate	99.25%	11.36 / 10 mg 114% of label	—	5513X
15 Apr 2026	Tydes	Janoshik Labs	99.76%	25.87 / 20 mg 129% of label	—	TB20040626
14 Apr 2026	PeptideTech	freedomdiagnosticstesting.com	99.20%	4.94 / 5 mg 99% of label	—	TBM5-6585✓
14 Apr 2026	Growth Guys	Janoshik Labs	99.93%	5.67 / 5 mg 113% of label	—	TB08
13 Apr 2026	Nova BioLabs Peptides	Janoshik Labs	99.47%	10.82 / 10 mg 108% of label	—	NVTB10-01042026
12 Apr 2026	Evolve Biopep	Ethos Analytics	98.00%	10.14 / 10 mg 101% of label	Pass	ETB-260402-H10
12 Apr 2026	Pure Health Peptides	Ethos Analytics	99.00%	10.21 / 10 mg 102% of label	—	TUY-030926
11 Apr 2026	Purity Peptides	MDx BioAnalytical Laboratory	99.75%	10.2 / 10 mg 102% of label	Pass	View record →
11 Apr 2026	Nova Peptide Supply	freedomdiagnosticstesting.com	99.26%	10.64 / 10 mg 106% of label	Pass	NV-P-7GQXM
10 Apr 2026	Polaris Peptides	TrustPointe Analytics	99.07%	12.62 / 10 mg 126% of label	—	POL-TB10-6✓
10 Apr 2026	24Peptides	liquilabs	99.40%	10.5 / 10 mg 105% of label	Reported	GF-TBFRAG10-B241
10 Apr 2026	Omega Peptides	Janoshik Labs	99.91%	11.34 / 10 mg 113% of label	—	TB10-2604
10 Apr 2026	Peppy&Me	Krause Analytical	99.60%	10.5 / 10 mg 105% of label	—	PMTB102603A
10 Apr 2026	Instant Peptides	Kovera Labs	99.94%	11.29 / 10 mg 113% of label	—	2026-0238-C
9 Apr 2026	Nura Peptide	freedomdiagnosticstesting.com	99.51%	11.06 / 10 mg 111% of label	—	TB5-04926J✓
9 Apr 2026	Rescue Research USA Peptides	freedomdiagnosticstesting.com	99.08%	13.36 / 10 mg 134% of label	—	View record →
9 Apr 2026	Vylix Research	freedomdiagnosticstesting.com	99.12%	5.61 / 5 mg 112% of label	—	View record →
8 Apr 2026	Perfect Peptides	Chromate	99.01%	11.15 / 10 mg 112% of label	Pass	PP2180272✓
8 Apr 2026	Glacier Aminos	Kovera Labs	99.94%	11.21 / 10 mg 112% of label	—	TB50GA-02
8 Apr 2026	Omegamino	freedomdiagnosticstesting.com	99.45%	11.71 / 10 mg 117% of label	—	1001
7 Apr 2026	High Tide Compounds	freedomdiagnosticstesting.com	99.29%	9.95 / 10 mg 99% of label	—	TB10-001✓
7 Apr 2026	Vera	freedomdiagnosticstesting.com	99.63%	11.46 / 10 mg 115% of label	—	TB10-260324A
7 Apr 2026	Blank Peptides	freedomdiagnosticstesting.com	99.08%	10.67 / 10 mg 107% of label	—	665394
7 Apr 2026	Amino USA	freedomdiagnosticstesting.com	99.61%	10.14 / 100 mg 10% of labelCheck label	—	261B17-2-L0006
7 Apr 2026	Amino USA	freedomdiagnosticstesting.com	99.08%	5.35 / 5 mg 107% of label	—	25TB05-0006
7 Apr 2026	Amino USA	freedomdiagnosticstesting.com	99.54%	11.45 / 10 mg 115% of label	—	26TB1223-0006
3 Apr 2026	American Peptides	Bioviridian	99.80%	12.12 / 10 mg 121% of label	Pass	TB10-0318
2 Apr 2026	Core Peptides	Vanguard Laboratory	99.80%	10 / 10 mg 100% of label	—	C73519✓
2 Apr 2026	Crush Research	BTLabs	99.80%	13 / 10 mg 130% of label	—	CR-TB510-2603-1
2 Apr 2026	Crush Research	BTLabs	99.80%	14.1 / 10 mg 141% of label	—	CR-WOLF10-2603-1
31 Mar 2026	Peptidology	Vanguard Laboratory	99.80%	10.61 / 10 mg 106% of label	—	1672
30 Mar 2026	PeptidePro Canada	Janoshik Labs	99.41%	10.34 / 10 mg 103% of label	—	2511-2-251
30 Mar 2026	Pure Health Peptides	Ethos Analytics	99.00%	5.31 / 5 mg 106% of label	—	TUY-030926
30 Mar 2026	VRIL Peptides	Janoshik Labs	99.72%	10.71 / 10 mg 107% of label	—	20260311
29 Mar 2026	Peptinexia	BTLabs	99.70%	11.1 / 10 mg 111% of label	—	TB50100316261
29 Mar 2026	Amino Forge	Horizon Analytical	99.25%	9.91 / 10 mg 99% of label	—	A-4131262-P
27 Mar 2026	Modern Research Peptides	freedomdiagnosticstesting.com	99.13%	5.69 / 5 mg 114% of label	—	YC1B5261✓
27 Mar 2026	NovaCell Peptides	liquilabs	99.80%	9.42 / 10 mg 94% of label	—	TB-022601
27 Mar 2026	Oath Peptides	freedomdiagnosticstesting.com	99.83%	11.88 / 10 mg 119% of label	—	B10526
26 Mar 2026	Skye Peptides	Janoshik Labs	99.37%	20.42 / 20 mg 102% of label	—	TBF26-20-001
24 Mar 2026	XL Peptides	Janoshik Labs	99.01%	4.9 / 5 mg 98% of label	—	269TB5
22 Mar 2026	BioEdge Research Labs	MDx BioAnalytical Laboratory	99.75%	10.13 / 10 mg 101% of label	Pass	260312TL103✓
22 Mar 2026	Modified Aminos	Ethos Analytics	—	32.78 / 30 mg 109% of label	Pass	MA-TBS-300
22 Mar 2026	Elutide	Horizon Analytical	99.25%	9.91 / 10 mg 99% of label	—	E-4131262
20 Mar 2026	Ameano Peptides	Janoshik Labs	99.87%	11.95 / 10 mg 119% of label	—	TB4100303 2026-12✓
20 Mar 2026	Peptide Koning	Axiom Analytics	99.83%	10.62 / 10 mg 106% of label	Pass	PK-RG-009
20 Mar 2026	Simon's Compounding	Bioviridian	99.80%	10.18 / 10 mg 102% of label	—	View record →
20 Mar 2026	NuScience Peptides	freedomdiagnosticstesting.com	99.45%	11.82 / 10 mg 118% of label	—	000176
20 Mar 2026	Nexaph	Janoshik Labs	99.92%	11.95 / 10 mg 119% of label	—	TB41003032026-12
19 Mar 2026	Everest Peptides	freedomdiagnosticstesting.com	99.50%	10.82 / 10 mg 108% of label	—	EVR-TB50010-2603-001
19 Mar 2026	Pure Health Peptides	Ethos Analytics	99.00%	10.54 / 10 mg 105% of label	—	TUY-022626
19 Mar 2026	Pure Health Peptides	Ethos Analytics	99.00%	5.33 / 5 mg 107% of label	—	TUY-022626
18 Mar 2026	Real Peptides	freedomdiagnosticstesting.com	99.97%	not reported	—	View record →
17 Mar 2026	Oath Peptides	freedomdiagnosticstesting.com	99.83%	4.85 / 5 mg 97% of label	—	B0526
16 Mar 2026	Vandl Labs	Vanguard Laboratory	99.80%	5.95 / 5 mg 119% of label	Pass	TB.04.01.05
16 Mar 2026	Ion Peptide	Analytical Formulations Inc	99.55%	10.5 / 10 mg 105% of label	—	TB510-03102026
15 Mar 2026	True Research Labs	Horizon Analytical	99.28%	4.85 / 5 mg 97% of label	—	TRL-9562504
15 Mar 2026	EZ Peps	freedomdiagnosticstesting.com	99.17%	11.58 / 10 mg 116% of label	Pass	26-U2-RRT/TB4100226✓
14 Mar 2026	Luvion Bio Peptides	freedomdiagnosticstesting.com	99.28%	10.48 / 10 mg 105% of label	—	LBL-1125-BT10-1064
13 Mar 2026	Oneday Compounds	Vanguard Laboratory	99.02%	13.12 / 10 mg 131% of label	—	OC-TB10-102
13 Mar 2026	Stratford Peptides	Analiza Białek	99.33%	10.94 / 10 mg 109% of label	—	100013167
12 Mar 2026	PurgoLabs Peptides	freedomdiagnosticstesting.com	99.28%	11.35 / 10 mg 114% of label	—	PL-002✓
12 Mar 2026	Mile High Compounds	Vanguard Laboratory	99.14%	10.89 / 10 mg 109% of label	—	TB5-010-MH-03
12 Mar 2026	Primal Peptides	Janoshik Labs	99.59%	11.35 / 10 mg 114% of label	—	View record →
12 Mar 2026	Mile High Compounds	Vanguard Laboratory	99.08%	10.46 / 10 mg 105% of label	—	TB5-010-MH-03
11 Mar 2026	True Research Labs	Horizon Analytical	99.12%	10.15 / 10 mg 102% of label	—	TRL-1143805
11 Mar 2026	Molecular Solutions Peptides	freedomdiagnosticstesting.com	99.58%	12.91 / 10 mg 129% of label	—	R260304-TB10-W001✓
11 Mar 2026	Petratide Science	freedomdiagnosticstesting.com	98.09%	5.19 / 5 mg 104% of label	—	PS03-TB5R
10 Mar 2026	Vi CorpusBlendTB-500/Thymosin Beta-4	Janoshik Labs	99.47%	5.13 / 5 mg 103% of label	—	VCAU26.1
6 Mar 2026	GenPeptide	freedomdiagnosticstesting.com	99.54%	11.6 / 10 mg 116% of label	—	GPTB10030526✓
6 Mar 2026	Panda Peptides	freedomdiagnosticstesting.com	98.48%	5.25 / 5 mg 105% of label	—	View record →
6 Mar 2026	Chameleon PeptidesClosed	Janoshik Labs	98.48%	5.25 / 5 mg 105% of label	—	View record →
2 Mar 2026	BioEdge Research Labs	MDx BioAnalytical Laboratory	99.75%	10.08 / 10 mg 101% of label	Pass	TB41001302026-11✓
2 Mar 2026	Ion Peptide	freedomdiagnosticstesting.com	99.54%	11.37 / 10 mg 114% of label	Pass	TB10-02272026
28 Feb 2026	True Research Labs	Horizon Analytical	99.12%	9.68 / 10 mg 97% of label	—	TRL-7308120
28 Feb 2026	Imagine First Labs	Horizon Analytical	99.23%	10.18 / 10 mg 102% of label	—	IF-7209339
28 Feb 2026	Glacier Aminos	Kovera Labs	99.71%	87.77 / 50 mg 176% of labelCheck label	Pass	KIBGA-03
28 Feb 2026	Direct Peptides	Horizon Analytical	99.12%	9.68 / 10 mg 97% of label	—	View record →
27 Feb 2026	Oath Peptides	freedomdiagnosticstesting.com	99.69%	8.55 / 10 mg 86% of label	—	32CBF
27 Feb 2026	NG Peptide	freedomdiagnosticstesting.com	99.11%	23.8 / 23.8 mg 100% of label	—	TB04
26 Feb 2026	Glow Aminos	freedomdiagnosticstesting.com	99.27%	11 / 10 mg 110% of label	Pass	GL-010045✓
26 Feb 2026	Glowing Peptides	Janoshik Labs	99.39%	5.89 / 5 mg 118% of label	—	C117
26 Feb 2026	Trusted Peptides	BioRegen	99.52%	5.9 / 5 mg 118% of label	—	View record →
25 Feb 2026	KOLD Peptides	Accumark Labs	99.10%	9.66 / 10 mg 97% of label	—	1026
25 Feb 2026	Valor Peptides	Accumark Labs	99.06%	11.25 / 10 mg 113% of label	—	TB0002
24 Feb 2026	Blank Peptides	freedomdiagnosticstesting.com	99.82%	11.99 / 10 mg 120% of label	Pass	TB1011222025-J
24 Feb 2026	HkRoids	Testides	98.87%	10.09 / 10 mg 101% of label	—	TB5-262010-B1
23 Feb 2026	Regenorix Peptides	liquilabs	99.80%	7.8 / 10 mg 78% of labelCheck label	Pass	RGX-TB50010-2602-01
22 Feb 2026	Glow Aminos	Ethos Analytics	98.00%	32.21 / 30 mg 107% of label	Pass	GL-010021
22 Feb 2026	Oath Peptides	freedomdiagnosticstesting.com	99.74%	6.23 / 5 mg 125% of label	—	B0526
20 Feb 2026	Oath PeptidesBlendTB-500/BPC-157	freedomdiagnosticstesting.com	99.85%	12.86 / 5 mg 257% of labelCheck label	—	B10526
20 Feb 2026	BioLongevity Labs	MDx BioAnalytical Laboratory	99.76%	10.11 / 10 mg 101% of label	Pass	27-3-46071
20 Feb 2026	Modern Aminos	freedomdiagnosticstesting.com	99.63%	10.82 / 10 mg 108% of label	Pass	BX-P-X7V0
17 Feb 2026	Offline Peptides	freedomdiagnosticstesting.com	99.69%	12.69 / 10 mg 127% of label	—	OP-BT10-0226✓
17 Feb 2026	Protide Health	freedomdiagnosticstesting.com	99.22%	10.06 / 10 mg 101% of label	—	CS-tb-10-0111
16 Feb 2026	Amino Tech	freedomdiagnosticstesting.com	99.06%	5.62 / 5 mg 112% of label	—	View record →
16 Feb 2026	EZ Peptides	Janoshik Labs	99.83%	12.31 / 10 mg 123% of label	—	EZP-TB41001302026-11✓
16 Feb 2026	24Peptides	liquilabs	99.80%	9.66 / 10 mg 97% of label	Pass	GF082025010
16 Feb 2026	24Peptides	liquilabs	99.80%	22 / 20 mg 110% of label	Pass	GF-TB50020-B241
16 Feb 2026	Grey Market Peptide	freedomdiagnosticstesting.com	99.06%	5.62 / 5 mg 112% of label	—	View record →
16 Feb 2026	Peptide Crafters	Janoshik Labs	99.91%	9.99 / 10 mg 100% of label	—	PC-G3-TB10
16 Feb 2026	Soma ChemsClosed	freedomdiagnosticstesting.com	99.06%	5.62 / 5 mg 112% of label	—	Soma2602130289
14 Feb 2026	Crownwell Research	freedomdiagnosticstesting.com	99.82%	12.46 / 10 mg 125% of label	—	CW-TB10001✓
11 Feb 2026	Synthesis Peptides	freedomdiagnosticstesting.com	99.38%	13.68 / 10 mg 137% of label	—	View record →
10 Feb 2026	Imperial Peptides UK	Janoshik Labs	99.09%	5.47 / 5 mg 109% of label	—	TB5-12/27✓
10 Feb 2026	Ascension Peptides	MZ Biolabs	99.97%	4.89 / 5 mg 98% of label	—	31-01260229
10 Feb 2026	BioBoostX	Janoshik Labs	99.77%	24.32 / 20 mg 122% of label	—	EXP: 11/29
10 Feb 2026	Verified Peptides	Janoshik Labs	99.88%	12.33 / 12 mg 103% of label	—	TB02260810H
9 Feb 2026	Licensed Peptides	—	99.80%	10.05 / 10 mg 101% of label	Pass	TB500T-01
9 Feb 2026	Licensed Peptides	—	99.79%	10.05 / 10 mg 101% of label	Pass	TB500T-01
9 Feb 2026	Oneday Compounds	Vanguard Laboratory	99.80%	11.08 / 10 mg 111% of label	—	FC-TB10-101
8 Feb 2026	Molecular Solutions Peptides	freedomdiagnosticstesting.com	99.05%	5.34 / 5 mg 107% of label	—	R260122-TB5-W001✓
7 Feb 2026	Proxiva Peptides	Vanguard Laboratory	99.80%	6.29 / 5 mg 126% of label	—	0105
7 Feb 2026	Amino Club	freedomdiagnosticstesting.com	99.30%	10.88 / 10 mg 109% of label	—	T0101
7 Feb 2026	Simple Peptide	freedomdiagnosticstesting.com	99.49%	95.54 / 100 mg 96% of label	—	TB-500-02032026-J
5 Feb 2026	Ion Peptide	freedomdiagnosticstesting.com	99.19%	5.43 / 5 mg 109% of label	—	TB5-02022026
5 Feb 2026	Ion Peptide	freedomdiagnosticstesting.com	99.56%	7.13 / 7 mg 102% of label	Pass	BT10-02022026
4 Feb 2026	Polaris Peptides	TrustPointe Analytics	99.31%	12.28 / 10 mg 123% of label	—	POL-TB10-5✓
4 Feb 2026	BioLongevity LabsBlendGLOW	BioRegen	99.81%	12.41 / 10 mg 124% of label	—	4-3-46031
4 Feb 2026	Polaris Peptides	TrustPointe Analytics	99.38%	12.16 / 10 mg 122% of label	—	POL-TB10-5
2 Feb 2026	Amino Lair	Janoshik Labs	99.78%	9.09 / 10 mg 91% of label	—	26.02.03
2 Feb 2026	Loti Labs	SR Bio Labs	99.87%	2.84 / 2 mg 142% of label	—	LOT-TB50-00004
1 Feb 2026	Loti Labs	SR Bio Labs	99.98%	5.12 / 5 mg 102% of label	—	LOT-TB50-00003
29 Jan 2026	Certified Peptides	Vanguard Laboratory	99.05%	10.24 / 10 mg 102% of label	Pass	260120TL103
27 Jan 2026	Liberty Peptides	Bioviridian	99.45%	5.38 / 5 mg 108% of label	—	LPUS24002
26 Jan 2026	Astra Peptides	Horizon Analytical	99.67%	10.25 / 10 mg 102% of label	—	ASTR-62982
24 Jan 2026	Oath Peptides	freedomdiagnosticstesting.com	99.13%	10.25 / 10 mg 102% of label	—	32ABF
24 Jan 2026	NeuroLabsBlendTB-500/BPC-157	freedomdiagnosticstesting.com	99.21%	14.03 / 10 mg 140% of label	—	2601220038
23 Jan 2026	PeakForm Peptides	freedomdiagnosticstesting.com	99.08%	5.66 / 10 mg 57% of labelCheck label	—	PF-2026-018
22 Jan 2026	Nova Peptide Supply	freedomdiagnosticstesting.com	99.22%	6.19 / 5 mg 124% of label	—	NV-P-3Y1G
20 Jan 2026	Penguin Peptides	Janoshik Labs	99.86%	11.38 / 10 mg 114% of label	—	View record →
20 Jan 2026	Penguin Peptides	Janoshik Labs	99.56%	5.27 / 5 mg 105% of label	—	View record →
18 Jan 2026	Petratide Science	freedomdiagnosticstesting.com	99.72%	4.22 / 5 mg 84% of label	—	PS01-TA1
18 Jan 2026	NUPEPS Peptides	BTLabs	99.80%	12.7 / 10 mg 127% of label	—	CS-tb101105
18 Jan 2026	Pure Health Peptides	Ethos Analytics	99.00%	10.36 / 10 mg 104% of label	—	CHA-011526
18 Jan 2026	Pure Health Peptides	Ethos Analytics	99.00%	5.11 / 5 mg 102% of label	—	CHA-011526
16 Jan 2026	Blue Sky Peptide	MZ Biolabs	99.87%	not reported	—	1SWTB0126
16 Jan 2026	NG Peptide	freedomdiagnosticstesting.com	99.80%	11.36 / 10 mg 114% of label	—	TB-01
15 Jan 2026	Limitless Biotech	TrustPointe Analytics	99.79%	10.96 / 10 mg 110% of label	—	1301
15 Jan 2026	Growth Guys	Janoshik Labs	99.74%	5.87 / 5 mg 117% of label	—	TB07
15 Jan 2026	Glacier Aminos	freedomdiagnosticstesting.com	99.13%	12.98 / 10 mg 130% of label	Pass	TB10GA01
15 Jan 2026	Injectify	Janoshik Labs	99.82%	10.91 / 10 mg 109% of label	—	PE2401-663
14 Jan 2026	Badger Compounds	Analytical Formulations Inc	99.80%	10.28 / 10 mg 103% of label	—	View record →
14 Jan 2026	Peptide Partners	TrustPointe Analytics	99.82%	10.9 / 10 mg 109% of label	—	TB202601
13 Jan 2026	New Wave Peptides	Janoshik Labs	99.91%	10.38 / 10 mg 104% of label	—	19340/B
12 Jan 2026	Astra Peptides	Horizon Analytical	99.57%	10.22 / 10 mg 102% of label	—	ASTR-37472
12 Jan 2026	OROS Research	freedomdiagnosticstesting.com	98.14%	9.94 / 10 mg 99% of label	—	1356233
11 Jan 2026	ThreeSide Peptides	Krause Analytical	99.14%	14.7 / 10 mg 147% of label	—	TB102512
9 Jan 2026	Amino Pure Canada	Janoshik Labs	99.16%	21.51 / 20 mg 108% of label	—	T3123✓
9 Jan 2026	Cosmic Peptides	Bioviridian	99.80%	9.97 / 10 mg 100% of label	—	25058
8 Jan 2026	GenPeptide	freedomdiagnosticstesting.com	98.88%	11.02 / 10 mg 110% of label	—	GPTB10122825✓
5 Jan 2026	Verified Peptides	Janoshik Labs	99.87%	11.16 / 11 mg 101% of label	—	08-25-0410D
5 Jan 2026	Felix Chemical Supply	freedomdiagnosticstesting.com	99.31%	11.89 / 10 mg 119% of label	—	010226-TB5-0
5 Jan 2026	Tydes	Janoshik Labs	99.12%	10.25 / 10 mg 102% of label	—	TB10122225
5 Jan 2026	Skye Peptides	Janoshik Labs	99.16%	10.16 / 10 mg 102% of label	—	TB25-10-004
31 Dec 2025	Felix Chemical Supply	freedomdiagnosticstesting.com	99.57%	10.25 / 10 mg 102% of label	—	122925-TB5-0
30 Dec 2025	Ktechpeptide	Janoshik Labs	99.06%	11.19 / 10 mg 112% of label	—	2025-12✓
23 Dec 2025	Aavant Peptides	Janoshik Labs	99.64%	10.22 / 10 mg 102% of label	—	967293-000001 (yellow cap)✓
23 Dec 2025	Verified Peptides	Janoshik Labs	99.34%	12.2 / 12 mg 102% of label	—	01-26-0710G
23 Dec 2025	Felix Chemical Supply	freedomdiagnosticstesting.com	99.45%	10.08 / 10 mg 101% of label	—	121525-TB5-A
22 Dec 2025	Amino USA	freedomdiagnosticstesting.com	98.61%	5.14 / 5 mg 103% of label	—	25TB05-0005
22 Dec 2025	Astra Peptides	Horizon Analytical	99.20%	5.78 / 5 mg 116% of label	—	ASTR-42273
20 Dec 2025	Nova Peptide Supply	freedomdiagnosticstesting.com	99.08%	5.75 / 5 mg 115% of label	Pass	View record →
19 Dec 2025	Peptide Crafters	Janoshik Labs	99.80%	10.88 / 10 mg 109% of label	—	PC-G2-TB10
18 Dec 2025	Kimera Chems	freedomdiagnosticstesting.com	99.97%	5.23 / 5 mg 105% of label	—	KC-BTB-PUR1
18 Dec 2025	Kimera Chems	TrustPointe Analytics	99.68%	5.5 / 5 mg 110% of label	—	KC-BTB-PUR1
18 Dec 2025	Growth Guys	Janoshik Labs	99.06%	11.23 / 10 mg 112% of label	—	TB06
15 Dec 2025	Simply Peptides	Janoshik Labs	99.75%	11.05 / 5 mg 221% of labelCheck label	—	2512-03-01
15 Dec 2025	Real Peptides	BioRegen	99.67%	9.84 / 10 mg 98% of label	—	View record →
12 Dec 2025	NG Peptide	freedomdiagnosticstesting.com	99.60%	11.58 / 11.58 mg 100% of label	—	GLW4760
11 Dec 2025	Simple Peptide	freedomdiagnosticstesting.com	99.62%	11.43 / 10 mg 114% of label	—	TBF 10.1206025402
9 Dec 2025	Core Peptides	Vanguard Laboratory	99.80%	4.89 / 5 mg 98% of label	—	C73516
8 Dec 2025	Nexaph	Janoshik Labs	99.56%	11.63 / 10 mg 116% of label	—	TBF1011282025-02
5 Dec 2025	Beyond Peptides	Janoshik Labs	99.61%	10.21 / 10 mg 102% of label	—	001
4 Dec 2025	NG Peptide	freedomdiagnosticstesting.com	99.17%	11.24 / 10 mg 112% of label	—	TB01
2 Dec 2025	Amino USA	freedomdiagnosticstesting.com	98.99%	11.17 / 100 mg 11% of labelCheck label	—	251B10-0005
28 Nov 2025	Research Peptides Europe	liquilabs	98.99%	5.71 / 5 mg 114% of label	Pass	TB500/2025-11-20
28 Nov 2025	OROS Research	freedomdiagnosticstesting.com	99.81%	6.24 / 5 mg 125% of label	—	825570
28 Nov 2025	Skye Peptides	Janoshik Labs	99.55%	21.47 / 20 mg 107% of label	—	TB25-20-002
25 Nov 2025	HkRoids	Janoshik Labs	99.79%	5.86 / 5 mg 117% of label	—	1113
24 Nov 2025	Peptidex	Janoshik Labs	99.46%	5.47 / 5 mg 109% of label	—	TB5/2025-10-20-A
20 Nov 2025	Prime Peptides	Janoshik Labs	99.29%	11.71 / 10 mg 117% of label	—	10162025TB
20 Nov 2025	Optima Supply	Janoshik Labs	99.35%	10.97 / 10 mg 110% of label	—	View record →
20 Nov 2025	Hydro Research Peptides	Janoshik Labs	99.35%	10.97 / 10 mg 110% of label	—	HYDRO3L6MDGQ
18 Nov 2025	Profound Aminos	Janoshik Labs	99.33%	10.48 / 10 mg 105% of label	—	View record →
18 Nov 2025	Profound Aminos	Janoshik Labs	99.23%	5.38 / 5 mg 108% of label	—	View record →
16 Nov 2025	Ion Peptide	freedomdiagnosticstesting.com	98.50%	10.63 / 10 mg 106% of label	—	TB10-1125
12 Nov 2025	RUO.bio	Janoshik Labs	99.88%	11.82 / 10 mg 118% of label	—	tb1001
10 Nov 2025	Astra Peptides	Horizon Analytical	99.87%	10.25 / 10 mg 102% of label	—	ASTR-33874

Measured amount in amber when it is under 90% or over 130% of the label; Check label when it is under 80% or over 150%. Records without a lot number link as View →. Blend and other-form rows keep their place and page; they are tagged and left out of the figures above, because a blend certificate reports one purity and one amount for the whole vial. Blends with their own page: Wolverine lab tests (143) · KLOW lab tests (108) · GLOW lab tests (92)

Seven checks for any TB-500 certificate

The same seven questions decide whether a certificate of analysis means anything, whichever compound it describes. Six are about the document; the seventh is about what no document can tell you.

An independent, batch-matched COA. The certificate must name the batch or lot in your hands, and must come from a laboratory the vendor neither owns nor pays. A specimen certificate from an earlier lot proves nothing about the vial you were sent.
HPLC purity, read against a known band. A purity figure is only informative against the distribution for that compound. "Above 98%" is not a claim — the useful question is whether the result sits inside the range the rest of the market reports. How to read HPLC and mass-spec results.
Mass-spectrometry identity. HPLC says how much of the sample is one thing; it does not say which thing. Only a mass-spec result establishes identity, and it is the only check that separates compounds a few daltons apart. Contamination is not hypothetical: research-grade custom peptides from two independent commercial suppliers were found to carry contaminating peptides at roughly 1% by weight, enough to produce false-positive results in immunology assays (Clinical and Vaccine Immunology, 2008 — a study of HIV vaccine peptide libraries rather than of any compound on this site).
Net content, measured rather than assumed. Purity and quantity are different questions: a vial can be 99.7% pure and still contain two thirds of the labelled mass. Why 10 mg isn't 10 mg.
Endotoxin (LAL) on the batch. An absent endotoxin line means the batch was not tested — not that it passed. Endotoxin testing and LAL interpretation.
Who ran the test, and what they left off. A laboratory with a record on this compound, named on the certificate, with a verification route back to it. Testing laboratories we track · Red flags in a certificate of analysis.
What no test on the vial can establish. A perfect certificate confirms that a vendor sold the correct molecule at the stated quantity. It says nothing about efficacy, dosing, or long-term safety.

Want a vial tested yourself? How to send a peptide for independent HPLC testing.