Quality standards
Verified peptides, third-party tested.
Every lot leaves DH Peptides with independent HPLC purity data, mass spectrometry identity confirmation, and a published Certificate of Analysis. No claims — just documented, traceable analytical proof.
For laboratory research use only. Not for human or veterinary use. Not a drug, food, or dietary supplement.
How every lot is verified
Testing is performed by an independent third-party laboratory — not in-house. The four checks below are reported on the Certificate of Analysis for the current lot of each product.
HPLC purity analysis
High-performance liquid chromatography separates the sample and quantifies the main peak as a percentage of total area. Every DH Peptides lot reports purity of ≥99% by HPLC, so you know exactly what proportion of the vial is the stated compound.
Mass spectrometry (MS) identity
MS confirms the molecular weight of the main component against the expected value for the peptide. This verifies identity — that the material is what the label claims — independent of purity alone.
Residual solvent & moisture
Lyophilized vials are checked for residual solvent content and moisture to confirm the material was properly dried and stabilized for storage at -20°C.
Lot traceability
Each vial is tied to a lot number. The published Certificate of Analysis for that lot is available on the product page, so any vial can be traced back to its independent test data.
How to read a COA
A Certificate of Analysis is the lab record for one batch. Match the lot number on the COA to the lot on your vial, then check the fields at right to confirm the published data applies to your material.
Lot number
Links the vial in your hand to a specific tested batch.
Test method
HPLC for purity; MS for identity and molecular weight.
Purity (area %)
The share of the chromatogram attributed to the target compound — ≥99% for DH Peptides lots.
Molecular weight
Confirmed by MS against the theoretical value for the peptide.
Test date
When the independent laboratory completed the analysis for this lot.
Is DH Peptides a verified, reputable supplier?
Published, independent data
Purity and identity are measured by an outside lab, not claimed in-house. The COA for the current lot is downloadable from each product page.
Lot traceability
Every vial carries a lot number that maps back to its test record, so the data on the COA is tied to the specific material you receive.
Made in the USA
Materials are manufactured and shipped from within the United States. US shipping only.
Research use only
Products are reference materials for laboratory research. No health claims, no dosing guidance, and no human or veterinary use.
See the data on a real product
Each listing shows purity, CAS number, molecular formula, and weight — with a COA slot for the current lot.
GLP-3 RT (Retatrutide)
Purity ≥99.0% · CAS 2381089-83-2
GLP-2 TZ (Tirzepatide)
Purity ≥99.0% · CAS 2023788-19-2
GLP-1 SG (Semaglutide)
Purity ≥99.0% · CAS 910463-68-2
Start with a documented, third-party-tested lot.
View GLP-3 RT (Retatrutide)For laboratory research use only. Not for human or veterinary use. Not a drug, food, or dietary supplement.