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Independent Certifications

Third-party testing

Peptide Partners is committed to providing high-purity peptides at wholesale prices by frequently auditing its manufacturing partners using third-party laboratories. Independent analysis is vital to ensuring the quality and authenticity of your research peptides. Never trust a supplier that doesn’t submit to third-party testing. Never trust a certification that cannot be independently verified. All of the certificates that we provide can be validated on the third-party laboratory’s website. 

Each product description contains a Manufacturer ID corresponding to the producer of that product. The table below contains the most recent third-party analyses for all manufacturers and peptides listed on Peptide Partners. 

Current Purity certifications

PeptideBatch IdManufacturerDatePurityLaboratory
RetatrutideRP20251020DF052025-11-1099.33TrustPointeView File
RetatrutideRP20251001DF052025-10-1399.86TrustPointeView File
TirzepatideTZ20250915DF052025-10-0399.74%TrustPointeView File
RetatrutideRP20250929VI322025-10-0399.47%TrustPointeView File
HumaninHP20250805WF032025-09-1999.92%BioRegenView File
MOTS-cYC20250807WF032025-09-1999.87%BioRegenView File
DSIPDS20250820SH072025-09-1999.88%BioRegenView File
SS-31SY20250806WF032025-09-1999.70%BioRegenView File
CJC/IpamorelinCI20250805WF032025-09-1199.84%TrustPointeView File
BPC-157BP20250808WF032025-09-0599.99%TrustPointeView File
SermorelinSM20250723WF032025-08-2799.84%BioRegenView File
TesamorelinTS20250722WF032025-08-2299.10%TrustPointeView File
CJC-1295 NDCJ20250724WF032025-08-2099.43%TrustPointeView File
SemaglutideSM20250801EJ122025-08-2099.34%TrustPointeView File
IpamorelinIP20250721WF032025-08-1599.64%TrustPointeView File
GHK-CuCU20250717SH072025-08-0999.73%BioRegenView File
TirzepatideTZ20250730EJ122025-08-0899.41%TrustPointeView File
NAD+ND20250503SH072025-07-3199.76%BioRegenView File
VIPVP20250511SH072025-07-3199.42%BioRegenView File
RetatrutideCD20250708SH072025-07-2599.42%TrustPointeView File
BPC/TB500BB20250630SH072025-07-1799.52%TrustPointeView File
TB500 (TB4)TB20250614SH072025-07-1799.68%TrustPointeView File

Current Endotoxin Certifications

PeptideBatch IdManufacturerDateUSP<85> ConformationLaboratory
RetatrutideRP20251020DF052025-11-10ConformsTrustPointeView File
RetatrutideRP20251001DF052025-10-13ConformsTrustPointeView File
TirzepatideTZ20250915DF052025-10-03ConformsTrustPointeView File
RetatrutideRP20250929VI322025-10-03ConformsTrustPointeView File
HumaninHP20250805WF032025-09-19ConformsBioRegenView File
MOTS-cYC20250807WF032025-09-19ConformsBioRegenView File
DSIPDS20250820SH072025-09-19ConformsBioRegenView File
SS-31SY20250806WF032025-09-19ConformsBioRegenView File
CJC/IpamorelinCI20250805WF032025-09-03ConformsTrustPointeView File
BPC-157BP20250808WF032025-09-03ConformsTrustPointeView File
Bacteriostatic WaterBAC20250807SH072025-08-27ConformsBioRegenView File
TesamorelinTS20250722WF032025-08-20ConformsTrustPointeView File
CJC-1295 NDCJ20250724WF032025-08-20ConformsTrustPointeView File
SermorelinSM20250723WF032025-08-20ConformsTrustPointeView File
SemaglutideSM20250801EJ122025-08-20ConformsTrustPointeView File
IpamorelinIP20250721WF032025-08-11ConformsTrustPointeView File
GHK-CuCU20250717SH072025-08-08ConformsTrustPointeView File
TirzepatideTZ20250730EJ122025-08-04ConformsTrustPointeView File
NAD+ND20250503SH072025-07-29ConformsTrustPointeView File
VIPVP20250511SH072025-07-29ConformsTrustPointeView File
RetatrutideCD20250708SH072025-07-24ConformsTrustPointeView File
BPC/TB500BB20250630SH072025-07-17ConformsTrustPointeView File
TB500 (TB4)TB20250614SH072025-07-17ConformsTrustPointeView File

Current Sterility Certifications

ProductBatch IdManufacturerDateUSP<71> Pass/FailLaboratory
Bacteriostatic WaterBAC20250807SH072025-09-09PassTrustPointeView File
Meta-ZMZR20250713DF052025-08-26PassTrustPointeView File

Verifiable certificates

When obtaining research peptides, it is essential to validate the authenticity of the Certificate of Analysis (COA). Certificate fraud runs rampant throughout the research peptide supply community. The two most common forms are doctored images and stolen certificates. You can check for these two by making sure the third-party laboratory’s website shows that the certificate belongs to the supplier and the values haven’t been doctored. TrustPointe Analytics provides a few simple rules for verification:

When obtaining research peptides, it is essential to validate the authenticity of the Certificate of Analysis (COA). Certificate fraud runs rampant throughout the research peptide supply community. The two most common forms are doctored images and stolen certificates. You can check for these two by making sure the third-party laboratory’s website shows that the certificate belongs to the supplier and the values haven’t been doctored. TrustPointe Analytics provides a few simple rules for verification:

Beware of fraudulent laboratories

Not only must one remain vigilant about potentially fraudulent certificates, one must also be aware that there are third-party laboratories whose results cannot be considered reliable or scientifically valid. Unfortunately, there is significant evidence to suggest that one of the most popular third-party testing labs does not use scientifically sound methodologies and, in some cases, has fabricated results. There isn’t an easy remedy for this problem, but when labs are particularly bad, there tend to be a lot of discussion threads on various social platforms.

Interpreting Endotoxin Results (via TrustPointe)

Our friends at TrustPointe have provided the following detailed explanation to help interpret the results of the endotoxin testing.

We use the Charles River Endosafe PTS system to test for bacterial endotoxins following USP <85> guidelines:

USP <85> Bacterial Endotoxin Result: <x.xx EU/mL
Because it’s reported as “<x.xx” this indicates the test did not detect endotoxin above the detection limit of the cartridge.

If a result is above the limit of detection of the cartridge, it will be reported as a number (without the “<“).

The following are suitability parameters that verify the system was working properly and the sample prep dilution is appropriate for accurate results. Peptides often interfere with endotoxin detection due to their tendency to bind or mask endotoxins, which can lead to inaccurate low results. To overcome this, samples are typically tested at a large dilution to reduce matrix interference and ensure reliable recovery and detection in compliance with USP <85>.  If the dilution is not correct, the run will fail suitability and we’ll need to adjust the dilution to ensure accurate results. We provide the suitability data to customers for transparency and so they can be confident in the results.

USP <85> Sample CV %:

CV stands for coefficient of variation, a measure of repeatability.

For our lab, CV has to be <25% or the result to be considered valid

USP <85> Spike CV %:

This refers to the precision of the positive control (spiked sample).

Again, for our lab CV has to be <25% or the result to be considered valid

USP <85> Spike Recovery

This tells us how much of the known endotoxin spike was recovered from your sample.

The acceptable range is 50–200% per USP <85>