- COAs on file
- 7
- Independently confirmed
- 0
- Median purity
- 99.38%
- At or above market
- 2/7
- Most recent
- 11 Aug
across 1 lab
none on record
▼ 0.28 vs corpus
compounds comparable
54 days ago
Research use only. This vendor supplies peptides for laboratory and research purposes — not for human consumption or therapeutic use. PeptideBase does not endorse or guarantee product quality. Verify third-party lab testing before any research use.
Vendor-supplied · Not verified by PeptideBase
What this vendor publishes about itself, repeated here. Disclosure is not verification; only independent lab results change that.
7 certificates on file, all self-published by the vendor. Median purity 99.38%, against 99.66% across all 1,295 certificates we score. Two of seven compounds test at or above their market median. The exception is a Semax lot at 98.38% — 0.99 points below the 99.37% median for that compound, and the only result here outside the corpus's middle 80%.
Evidence provenance
- 7 self-published
- COAs the vendor posted on their own site.
Recorded for completeness. A self-published document doesn't count as confirmed on its own — the document is real, the chain of custody isn't independent.
Purity vs market
4 of 7 results sit within ±0.4 points of their market median.
Lab testing record
Every COA we hold for Peptide Works.
How these certificates can be checked
Of the 7 certificates we hold for Peptide Works:
- 7Carries a lookup reference
| Panel | Source | Reference | |||||
|---|---|---|---|---|---|---|---|
| GHK-Cu | Janoshik Analytical | 11 Aug 26 | 99.46% | −0.30 | — | Self-published | View COA ↗ |
| Janoshik Analytical publishes a report lookup and this certificate carries the reference it needs. No lookup result is recorded. | |||||||
| TB-500 | Janoshik Analytical | 11 Aug 26 | 98.51% | −0.89 | — | Self-published | View COA ↗ |
| Janoshik Analytical publishes a report lookup and this certificate carries the reference it needs. No lookup result is recorded. | |||||||
| Semax | Janoshik Analytical | 12 May 26 | 98.38% | −0.99 | — | Self-published | View COA ↗ |
| Janoshik Analytical publishes a report lookup and this certificate carries the reference it needs. No lookup result is recorded. | |||||||
| Sermorelin | Janoshik Analytical | 12 May 26 | 98.38% | −0.92 | — | Self-published | View COA ↗ |
| Janoshik Analytical publishes a report lookup and this certificate carries the reference it needs. No lookup result is recorded. | |||||||
| Thymosin Alpha-1 | Janoshik Analytical | 12 May 26 | 99.69% | ±0.00 | — | Self-published | View COA ↗ |
| Janoshik Analytical publishes a report lookup and this certificate carries the reference it needs. No lookup result is recorded. | |||||||
| Kisspeptin-10 | Janoshik Analytical | 12 May 26 | 99.38% | −0.19 | — | Self-published | View COA ↗ |
| Janoshik Analytical publishes a report lookup and this certificate carries the reference it needs. No lookup result is recorded. | |||||||
| Ipamorelin | Janoshik Analytical | 12 May 26 | 99.88% | +0.10 | — | Self-published | View COA ↗ |
| Janoshik Analytical publishes a report lookup and this certificate carries the reference it needs. No lookup result is recorded. | |||||||
The lab behind these results
In the vendor's own words
Written by the vendor · Not verified by PeptideBase
Peptide Works is a leading supplier of research-grade peptides, providing a diverse range of high purity products designed for laboratory research. They specialize in delivering reliable, premium quality peptides with worldwide shipping and competitive pricing.
#Testing disclosure
- Publishes COAsVendor-stated
- Not observed
- COA accessVendor-stated
- Not established
- Last observedOur record
- 6 Jul 2026
- Batch numbers shownOur record
- Not disclosed
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Free to reference and republish with attribution to PeptideBase. Choose a format:
PeptideBase. (2026). Peptide Works — Research Vendor Profile. Retrieved October 4, 2026, from https://peptidebase.io/research-vendors/peptide-works