Merit

For research use only. Not for human consumption. Not medical advice — consult a licensed clinician.

Testing lab

MZ Biolabs

Tucson AZ. No ISO 17025. Purity only — no sterility/metals standard. (136 independent COAs on file at Merit Verified, lab-quality score 70/100 (Moderate).)

Vendors covered
7
Peptides tested
10
Latest report
Jul 2026
Who they test for

Top 10 vendors served

What they test

Top 10 peptides tested

Recent analyses

Latest COAs from MZ Biolabs

Most recent test reports on file.

Aggregated · 3rd-party listing
99.98 %
Jul 2026
MZ Biolabs Moderate

For

Glutathione

by Longeva· batch B-2026-Glutathione-1500-002

Aggregated · 3rd-party listing
99.97 %
Jul 2026
MZ Biolabs Moderate

For

GHK-Cu

by Seus Peptides· batch CU50-260701

Aggregated · 3rd-party listing
99.80 %
Jul 2026
MZ Biolabs Moderate

For

Selank

by Seus Peptides· batch SK5-260701

Aggregated · 3rd-party listing
99.19 %
Jul 2026
MZ Biolabs Moderate

For

Semax

by Seus Peptides· batch SX5-260701

✓ Vendor-published
99.95 %
Jun 2026
MZ Biolabs Moderate

For

Tesamorelin

by Sports Technology Labs· batch 2-1576-30

COA on file
✓ Vendor-published
99.66 %
Jun 2026
MZ Biolabs Moderate

For

MOTS-C

by Sports Technology Labs· batch 2026-06-30

COA on file
✓ Vendor-published
99.43 %
Jun 2026
MZ Biolabs Moderate

For

BPC-157 (Bepecin) Arginine Salt

by Sports Technology Labs· batch 2026-05-30

COA on file
Aggregated · 3rd-party listing
98.90 %
May 2026
MZ Biolabs Moderate

For

KPV

by Kimera Chems· batch KC-KPV-03

✓ Vendor-published
99.17 %
May 2026
MZ Biolabs Moderate

For

Sermorelin

by Sports Technology Labs· batch 2026-05-15

COA on file
✓ Vendor-published
99.02 %
May 2026
MZ Biolabs Moderate

For

AOD-9604

by Sports Technology Labs· batch 2026-05-04

COA on file
✓ Vendor-published
99.97 %
Apr 2026
MZ Biolabs Moderate

For

GHK Copper

by Sports Technology Labs· batch 2026-04-13

COA on file
Aggregated · 3rd-party listing
99.86 %
Feb 2026
MZ Biolabs Moderate · HPLC

For

Ipamorelin

by Ascension Peptides· batch 06-01260229

Aggregated · 3rd-party listing
99.79 %
Feb 2026
MZ Biolabs Moderate · HPLC

For

BPC-157

by Ascension Peptides· batch 11-01260229

Aggregated · 3rd-party listing
99.79 %
Feb 2026
MZ Biolabs Moderate · HPLC

For

BPC-157

by Ascension Peptides· batch 11-01260229

Aggregated · 3rd-party listing
99.47 %
Feb 2026
MZ Biolabs Moderate · HPLC

For

PT-141

by Ascension Peptides· batch 28-01260229

Aggregated · 3rd-party listing
99.47 %
Feb 2026
MZ Biolabs Moderate · HPLC

For

Bremelanotide

by Ascension Peptides· batch 28-01260229

Aggregated · 3rd-party listing
99.75 %
Feb 2026
MZ Biolabs Moderate · HPLC

For

Semax

by Ascension Peptides· batch 30-01260229

Aggregated · 3rd-party listing
99.94 %
Jan 2026
MZ Biolabs Moderate · HPLC

For

Retatrutide

by Ascension Peptides· batch 03-01260229

Aggregated · 3rd-party listing
99.94 %
Jan 2026
MZ Biolabs Moderate · HPLC

For

Retatrutide

by Ascension Peptides· batch 03-01260229

Aggregated · 3rd-party listing
99.97 %
Jan 2026
MZ Biolabs Moderate · HPLC

For

FOXO4-DRI

by Ascension Peptides· batch 55-01260229

Aggregated · 3rd-party listing
99.97 %
Jan 2026
MZ Biolabs Moderate · HPLC

For

FOXO4-DRI

by Ascension Peptides· batch 55-01260229

✓ Vendor-published
99.45 %
Oct 2025
MZ Biolabs Moderate

For

PEG-MGF

by Sports Technology Labs· batch 2025-10-06

COA on file
✓ Vendor-published
99.45 %
Oct 2025
MZ Biolabs Moderate

For

PEG-MGF

by Sports Technology Labs· batch 2026-10-29

COA on file
✓ Vendor-published
99.90 %
Oct 2025
MZ Biolabs Moderate

For

PT-141 (Bremelanotide)

by Sports Technology Labs· batch 2028-1406

COA on file
✓ Vendor-published
99.63 %
Oct 2025
MZ Biolabs Moderate

For

Melanotan II

by Sports Technology Labs· batch 2025-10-15

COA on file
✓ Vendor-published
99.26 %
Oct 2025
MZ Biolabs Moderate

For

Kisspeptin-10

by Sports Technology Labs· batch 2025-04-06

COA on file
Aggregated · 3rd-party listing
99.48 %
Oct 2025
MZ Biolabs Moderate · HPLC

For

PE-22-28

by Ascension Peptides· batch 41-06250728

Aggregated · 3rd-party listing
99.48 %
Oct 2025
MZ Biolabs Moderate · HPLC

For

PE-22-28

by Ascension Peptides· batch 41-06250728

Aggregated · 3rd-party listing
99.27 %
Oct 2025
MZ Biolabs Moderate · HPLC

For

Sermorelin

by Ascension Peptides· batch 38-07250828

Aggregated · 3rd-party listing
99.93 %
Aug 2025
MZ Biolabs Moderate · HPLC

For

Retatrutide

by Profound Aminos· batch 2025-08-19

Aggregated · 3rd-party listing
99.96 %
Jul 2025
MZ Biolabs Moderate

For

Retatrutide

by Genetic Peptide· batch F20350627

Aggregated · 3rd-party listing
99.91 %
Jul 2025
MZ Biolabs Moderate

For

Tirzepatide

by Genetic Peptide· batch F20350627

Aggregated · 3rd-party listing
99.90 %
Jul 2025
MZ Biolabs Moderate

For

Semaglutide

by Genetic Peptide· batch F20350627

Aggregated · 3rd-party listing
99.89 %
Jul 2025
MZ Biolabs Moderate

For

Tesamorelin

by Genetic Peptide· batch F21050627

Aggregated · 3rd-party listing
99.86 %
Jul 2025
MZ Biolabs Moderate

For

BPC-157

by Genetic Peptide· batch F21250627

Aggregated · 3rd-party listing
99.80 %
Jul 2025
MZ Biolabs Moderate

For

Retatrutide

by Genetic Peptide· batch E22950527

Aggregated · 3rd-party listing
99.73 %
Jul 2025
MZ Biolabs Moderate

For

Sermorelin

by Genetic Peptide· batch F21050627

Aggregated · 3rd-party listing
99.69 %
Jul 2025
MZ Biolabs Moderate

For

Tesamorelin

by Genetic Peptide· batch F21250627

Aggregated · 3rd-party listing
99.57 %
Jul 2025
MZ Biolabs Moderate

For

HCG

by Genetic Peptide· batch F20350627

✓ Vendor-published
98.36 %
Jul 2025
MZ Biolabs Moderate

For

CJC-1295 with DAC

by Sports Technology Labs· batch 2025-06-16

COA on file