COA transparency
All 18 products are third-party tested by Freedom Diagnostics Testing, with each COA in a public COA database. Review them before you order.
Update — March 2026
US-based research peptides with published third-party COAs. Same-day processing. Fully operational.
For research and identification purposes only. Not for human consumption.
In March 2026, Peptide Sciences stopped accepting orders. Laboratories that ordered from Peptide Sciences now need another documented source.
Excalibur Peptides maintains full operations: independent third-party testing of all 18 products (purity by HPLC; identity by LC-MS), Certificates of Analysis in a public COA database, and US-based fulfillment from Austin, TX with same-day order processing.
For research and identification purposes only. Not for human consumption.
Common research compounds and the matching entries in the Excalibur catalog.
| Excalibur Catalog | Compound | Status |
|---|---|---|
| BPC-157 | BPC-157 | In catalog |
| TB-500 | TB-500 | In catalog |
| GHK-Cu | GHK-Cu | In catalog |
| Tesamorelin | Tesamorelin | In catalog |
| GHRP-6 | GHRP-6 | In catalog |
| NAD+ | NAD+ | In catalog |
| MOTS-C | MOTS-c | In catalog |
| LL-37 | LL-37 | In catalog |
| Wolverine Blend | BPC-157 + TB-500 blend | In catalog |
All compounds for research use only. Not for human consumption.
All 18 products are third-party tested by Freedom Diagnostics Testing, with each COA in a public COA database. Review them before you order.
Orders ship from Austin, Texas, with same-day order processing on in-stock compounds.
Purity by HPLC; identity by LC-MS (Freedom Diagnostics Testing), as reported on each product's published COA. Full COA documentation at /coa.
All products for research use only. Not for human consumption.
In March 2026, the company stopped accepting orders. The reason has not been publicly disclosed, and this page does not speculate about it.
What matters for laboratories is the practical question of continuity: where to source the same compounds, with documentation that can be reviewed and archived alongside existing experimental records.
Compounds previously ordered from Peptide Sciences now have to be sourced elsewhere, with new documentation to review and archive. Excalibur Peptides is one US-based option, with published third-party COAs; its catalog includes BPC-157, TB-500, GHK-Cu, Tesamorelin, GHRP-6 and NAD+. For research use only.
When evaluating a replacement supplier for laboratory research procurement, four objective criteria are worth checking against any vendor that markets itself as a "Peptide Sciences alternative." All four matter; together they determine whether the compounds you receive can be documented well enough for reproducible work.
High-performance liquid chromatography (HPLC) quantifies peptide purity by separating the target compound from synthesis byproducts, truncated sequences, and degradation products. An identity method confirms it is the intended compound: LC-MS compares the measured molecular mass with the theoretical mass of the sequence, and FTIR compares the infrared spectrum with that of a known standard. HPLC alone tells you how pure the compound is but not whether it is the right compound, and an identity test alone does not report purity. Documentation should report both.
A certificate of analysis (COA) is the lab report tying a tested sample of a compound to specific test results. Public COAs — accessible without an account, downloadable, and listed by product — are the simplest way a researcher can review before purchase how a compound has been tested. A "third-party tested" statement without a public COA database cannot be checked, so look for certificates you can open and archive yourself.
Independent third-party testing means the analytical work is performed by a laboratory that is not owned by, financially dependent on, or operationally controlled by the vendor. The COA should identify the testing laboratory by name and give a way to check the report with that laboratory or a verification platform. Anonymous COAs, in-house COAs labeled as third-party, and COAs from labs that cannot be independently contacted are not equivalent to verified third-party documentation.
Shipping origin affects transit time and customs handling. Excalibur orders shipped within the U.S. typically arrive in 2–4 business days; international shipments pass through customs and can be held for inspection. Confirm the shipping origin and how to reach customer support before placing a research order.
All compounds discussed are for research and identification purposes only. Not for human consumption.
Excalibur Peptides is built around the criteria above: COA transparency, US-based operations and a research-only catalog. Each one is part of our standard operating procedure.
HPLC purity, reported on the COA. All 18 products are third-party tested, with purity measured by high-performance liquid chromatography. The quantified purity result appears on the published COA and next to the COA link on the product page, not in general marketing copy.
Identity confirmation (LC-MS). Identity is confirmed on each COA by LC-MS at Freedom Diagnostics Testing, the laboratory that tests all 18 products: liquid chromatography separates the sample, and mass spectrometry checks the measured molecular mass against the theoretical mass of the intended sequence. This is the analytical check that confirms a vial labeled BPC-157 actually contains BPC-157 and not a structurally similar but incorrect compound. The identity result is published alongside the HPLC result.
Named third-party laboratory. All 18 products are tested by Freedom Diagnostics Testing, an independent laboratory. Each report names Excalibur Peptides as the client and carries a search code that anyone can enter on the lab's own COA lookup page, with no account needed. Each COA names the testing laboratory.
Full catalog, US-based, same-day processing. We carry BPC-157, TB-500, GHK-Cu, Tesamorelin, GHRP-6 and NAD+, plus MOTS-C, LL-37, Wolverine Blend, and additional research compounds. Orders placed before 2 PM EST on a business day ship the same day from Austin, Texas. Every product is made in fresh batches, frozen, and kept at −10 °F until the day it ships, and domestic delivery is 2–4 business days with tracking. Questions go to info@excaliburpeptides.com.
Public COA database. Certificates of Analysis are published at /coa, listed by product, showing the HPLC purity result, the identity confirmation (LC-MS), the testing lab, and the date of analysis. Each vial label also carries a printed batch number and QR code for your records. No login required, no email gating — public verification is the point.
All Excalibur Peptides products are sold for research and identification purposes only. Not for human consumption.
A documentation checklist. Excalibur entries describe our own documentation; we make no claims about other suppliers, so review their current certificates directly.
| Criterion | Excalibur Peptides | Protide | Limitless Life |
|---|---|---|---|
| HPLC testing | On published COAs | See vendor COAs | See vendor COAs |
| Identity testing (LC-MS or FTIR) | On published COAs | See vendor COAs | See vendor COAs |
| Public COA database | Yes — listed by product | See vendor site | See vendor site |
| Named third-party lab | Yes — named on each COA | See vendor COAs | See vendor COAs |
| Purity reporting | HPLC result on product COA | See vendor COAs | See vendor COAs |
| US-based shipping | Austin, TX — same-day processing | See vendor policy | See vendor policy |
| Domestic transit | 2–4 business days | See vendor policy | See vendor policy |
| Catalog breadth | 18-product research catalog | See vendor catalog | See vendor catalog |
| Research-use-only framing | Yes — explicit | See vendor site | See vendor site |
Excalibur Peptides sells research peptides for in-vitro laboratory and identification purposes only. Not for human consumption. Verify current documentation directly with each vendor before procurement.
| Feature | Peptide Sciences | Excalibur Peptides |
|---|---|---|
| Status | Stopped accepting orders in March 2026 | Operational |
| COA testing | See the vendor's own documentation | HPLC + LC-MS |
| Public COA database | See the vendor's own documentation | Yes |
| US-based | See the vendor's own documentation | Austin, TX |
| Domestic shipping | Not accepting orders | 2–4 days, same-day processing |
| Research use only | See the vendor's own documentation | Yes |
Peptide Sciences stopped accepting orders in March 2026. Excalibur Peptides is not affiliated with Peptide Sciences and has no information beyond what has been publicly reported.
Excalibur Peptides is an operational US-based research peptide supplier. All 18 products are third-party tested, and each product's COA, naming the testing laboratory, is published in a public COA database. The catalog includes BPC-157, TB-500, GHK-Cu, Tesamorelin, GHRP-6 and NAD+, plus additional research compounds. Research use only.
All 18 Excalibur products are third-party tested by Freedom Diagnostics Testing: purity by HPLC, identity by LC-MS, with each COA publicly accessible and the laboratory named on the report. Compare these reports with the documentation you have on file from any previous supplier.
BPC-157, TB-500, GHK-Cu, Tesamorelin, GHRP-6 and NAD+ are all in the Excalibur catalog, along with MOTS-c, LL-37, the Wolverine Blend and other research compounds. Compare the catalog with your previous order list and check each product's COA. All for research use only.
Orders placed before 2 PM EST on a business day ship the same day from Austin, Texas, with tracking, and arrive in 2–4 business days within the U.S. Every product is stored frozen at −10 °F until the day it ships.
Excalibur publishes HPLC purity and identity results (LC-MS) from a named third-party laboratory on each product's COA. We make no claims about other suppliers' documentation: documentation formats differ, so review each vendor's current certificates directly before ordering.
HPLC purity plus identity confirmation (LC-MS or FTIR) on the COA, a public COA database, a named third-party laboratory on the COA itself, US-based shipping with same-day processing, and strict research-use-only positioning across the supplier's entire site.
Not sure where to start? Begin with these product pages:
For research and identification purposes only. Not for human consumption.