Researchers who previously sourced from Biotech Peptides can find comparable compound options at Excalibur Peptides. Our catalog includes BPC-157, TB-500, GHK-Cu, Tesamorelin, GHRP-6, and newer research compounds such as GLP-2 T and GLP-3 R. Every order ships with an independent third-party CoA. All products are for in-vitro research use only.
Researchers who previously sourced from Biotech Peptides can find comparable compound options at Excalibur Peptides. Our catalog includes BPC-157, TB-500, GHK-Cu, Tesamorelin, GHRP-6, and newer research compounds such as GLP-2 T and GLP-3 R. Every order ships with an independent third-party CoA. All products are for in-vitro research use only.
Five years ago, the standard research-peptide purchase relied on whatever the vendor put on its product page. In 2026, principal investigators and independent labs are running stricter inbound checks: independent COA, MS identity confirmation, batch-level traceability, and a clear research-use-only designation across every customer touchpoint. Suppliers that built around the older model have had to retrofit; suppliers built around the newer expectations were structured for it from day one.
When labs evaluate BioTech Peptides against Excalibur, the audit usually focuses on documentation: who issued the COA, when it was issued, and whether the document references the exact lot on the vial. Excalibur's COA pipeline is single-source — an independent analytical lab releases the report, the batch number is printed on the vial, and the report is indexed publicly at /coa. Researchers do not have to email anyone to verify what they are about to use in a binding or signaling assay.
Vendor catalog depth is often advertised in totals — 80, 100, 150 SKUs — but the working catalog for most US research labs is narrow. Tissue-repair work centers on BPC-157, TB-500, and GHK-Cu. Metabolic and growth-axis research draws on Tesamorelin, GHRP-6, MOTS-C, and the GLP-2 T / GLP-3 R class. Antimicrobial and signaling assays bring in LL-37 and NAD+. Blends like Wolverine and KLOW cover repair-stack combinations.
Excalibur holds inventory across that working catalog rather than padding a list with low-turnover SKUs. The result is fewer backorders on the compounds that drive actual procurement volume, and tighter batch-to-batch consistency because production cycles are running more often per SKU. When a compound shows in-stock on the catalog page, it ships from the Austin facility the same business day.
A direct comparison of the supplier criteria most US research labs evaluate before placing a procurement order.
| Criterion | Excalibur Peptides | Biotech Peptides |
|---|---|---|
| COA Issuance | Independent third-party lab, every batch | Per-batch COA referenced; access varies |
| Purity Standard | 99% minimum by HPLC | Typically 98% claimed |
| Identity Confirmation | LC-MS vs. theoretical molecular weight | Mass spec referenced |
| COA Database | Public, batch-number searchable | Per-product references |
| Shipping Origin | Austin, Texas — domestic only | US-based fulfillment |
| Order Processing | Same-day on in-stock, before cutoff | 1–3 business days |
| Payment Methods | Venmo, Cash App, crypto | Card, crypto |
| Catalog Focus | Working research-staple catalog, high turnover | Broad investigational catalog |
| Research-Use-Only Disclosure | Product page, COA, and checkout | Site-wide policy |
Comparison reflects publicly available information at time of writing. For research and identification purposes only.
Excalibur's analytical workflow is the same regardless of compound class: solid-phase peptide synthesis, reverse-phase HPLC purification, third-party HPLC purity quantification, and LC-MS identity confirmation against the published theoretical molecular weight. The threshold for batch release is 99% HPLC, and every released batch carries a retention sample so the published COA can be tied back to physical product later.
The core research compounds most labs evaluating Biotech Peptides are sourcing — all in stock and CoA-documented.
Both supply investigational peptides for laboratory use. Excalibur's differentiators are batch-level third-party COAs published in a public, searchable database, HPLC plus LC-MS on every production run, and US-based same-day shipping. Research use only.
Each batch COA includes the peptide identity confirmation by mass spectrometry, purity percentage by HPLC, batch/lot number matching the vial label, and the analytical lab signature. COAs are searchable by batch number at /coa.
BPC-157, TB-500, GHK-Cu, Tesamorelin, GHRP-6, NAD+, MOTS-C, LL-37, Wolverine Blend, KLOW Blend, and additional research-grade peptides. Full catalog on the homepage.
Austin, Texas. Same-day processing on in-stock items ordered before cutoff, with 2–4 business day domestic delivery.
No. All compounds are sold strictly for in-vitro laboratory research and identification purposes. Not for human consumption.
A product-page COA usually documents a representative batch — not necessarily the lot in the vial you receive. Excalibur indexes COAs by batch number; the number printed on the vial is the same number that pulls up the analytical report at /coa, so the document and the physical product are tied together.
Every production batch. The cost of analytical work is lower than the procurement risk of releasing an uncharacterized batch, and the public COA database depends on every released lot having its own analytical report.
In-stock orders placed before the same-day cutoff ship from Austin, Texas the same business day. Domestic ground transit is 2–4 business days. Orders placed Friday after cutoff or over weekends ship the next business day.
Compounds between production runs are marked out of stock on the catalog page rather than silently backordered. The next available batch publishes once the analytical lab releases the COA, and the listing returns to in-stock at that point.
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