Made fresh. Then frozen.
Made in fresh batches, then frozen and kept at −10 °F.
Lyophilized compounds for in-vitro laboratory research, with third-party Certificates of Analysis you can review before you order.
For in-vitro laboratory research use only. Not for human consumption.
Fresh. Frozen. Third-party tested.
Made in fresh batches. Kept frozen at −10 °F until the day it ships. Tested by an independent lab you can check yourself.
Made in fresh batches, then frozen and kept at −10 °F.
Kept in the freezer at −10 °F until the day it ships.
All 18 products are tested by an independent lab you can check yourself.
18 products: Freedom Diagnostics Testing.
Each label carries a printed batch ID and a QR code.
Best sellers
10mg · Metabolic Research
From $89.99
10/10/10/50mg · Tissue Research
From $119.99
10mg · GH-Axis Research
From $69.99
10mg · Cellular Research
From $59.99
Ranked by sales over the last three months. Updated September 2026.
Research peptide catalog
18 lyophilized research compounds, shipped from the U.S. Specifications and documentation are on each product page.
10mg · Third-party tested · From $89.99
10/10/10/50mg · Third-party tested · From $119.99
10mg · Third-party tested · From $69.99
10mg · Third-party tested · From $59.99
10mg · Third-party tested · From $39.99
10/10mg · Third-party tested · From $99.99
500mg · Third-party tested · From $59.99
10mg · Third-party tested · From $39.99
50mg · Third-party tested · From $34.99
10mg · Third-party tested · From $34.99
10mg · Third-party tested · From $64.99
10mg · Third-party tested · From $74.99
10mg · Third-party tested · From $44.99
10mg · Third-party tested · From $44.99
5mg · Third-party tested · From $24.99
5mg · Third-party tested · From $69.99
10mg · Third-party tested · From $39.99
10mg · Third-party tested · From $44.99
Research bundles
Multi-compound bundles for comparative pathway studies. Each bundle adds its compounds to your cart as individual items.
A three-compound bundle for growth hormone axis signaling pathway research combining a GHRH analog, a GHS-R1a agonist, and the pentadecapeptide BPC-157.
Includes: Tesamorelin 10mg, GHRP-6 5mg, BPC-157 10mg
$134.97 Bundle total
Multi-compound bundle targeting mitochondrial signaling, AMPK activation, and NAD+-dependent enzymatic pathway research.
Includes: Tesamorelin 10mg, MOTS-C 10mg, NAD+ 500mg
$169.97 Bundle total
Incretin receptor research bundle featuring dual and triple agonist peptides paired with a mitochondrial-derived signaling compound.
Includes: GLP-3R 10mg, GLP-2T 10mg, MOTS-C 10mg
$194.97 Bundle total
Receptor signaling research bundle combining a GHRH analog with a triple-agonist peptide and a mitochondrial signaling compound.
Includes: Tesamorelin 10mg, GLP-3R 10mg, MOTS-C 10mg
$199.97 Bundle total
Multi-pathway cellular research bundle featuring a four-peptide complex, an essential coenzyme, and a mitochondrial-derived peptide.
Includes: KLOW Blend 10/10/10/50mg, NAD+ 500mg, MOTS-C 10mg
$219.97 Bundle total
18 compounds, each also sold individually
Compare specifications side by side, then add what your study needs.
Product details, pricing and research specifications for each compound.
Reviews
TrustScore 4.6 out of 5 from 32 reviews on Trustpilot, as of September 30, 2026.
Research resources
Free reference content and guides for in-vitro research workflows. Not medical advice.
Side-by-side comparison of US-based research peptide suppliers on purity, COA, and operational coverage.
Catalog overview of in-vitro research peptides with purity and COA standards explained.
What domestic U.S. fulfillment means for research laboratories — shipping, customs, and lead times.
Peptide Sciences stopped accepting orders in March 2026: what a like-for-like research supplier should provide.
Factual GHRH-analog reference: research areas, molecular weight, and FAQs.
Switching suppliers?
Side-by-side comparisons of testing standards, COA transparency, and shipping origin — for laboratories evaluating a domestic U.S. supplier.
For in-vitro laboratory research use only. Not for human or animal consumption.
You can check the key facts yourself. Excalibur Peptides is a U.S.-based research peptide supplier that ships from Austin, Texas. All 18 products are third-party tested, and each product's Certificate of Analysis is published in the COA database at excaliburpeptides.com/coa, naming the testing laboratory and the code to look the report up with that lab. Each vial label carries a printed batch ID and a QR code, customer reviews are published on Trustpilot, and products are sold only to buyers 21 and older for in-vitro laboratory research use.
Every product's COA is listed at excaliburpeptides.com/coa with the testing laboratory's name and the code to look it up. Enter the search code printed on the report on Freedom Diagnostics Testing's COA lookup page, or search "Excalibur Peptides" there.
High-Performance Liquid Chromatography separates the components of a peptide sample and quantifies each peak. The purity percentage on a COA is the area of the target-peptide peak as a fraction of all detected peaks — measuring how much of the sample is the intended sequence versus truncated peptides, deletion sequences, or synthesis byproducts.
Mass spectrometry (typically LC-MS with electrospray ionization) measures the molecular weight of the peptide in the vial. Identity is confirmed when the observed mass matches the theoretical molecular weight calculated from the peptide's amino-acid sequence. FTIR is another identity method: it compares the sample's infrared spectrum with that of a known standard. Purity without identity confirmation is not sufficient, so a COA should report both.
Lyophilized (freeze-dried) peptides ship in sealed glass vials from the U.S. with tracking, and domestic delivery takes 2–4 business days. Every product is made in fresh batches, frozen, and kept at −10 °F until the day it ships. In the laboratory, unopened vials stay sealed and protected from light and moisture at the temperature listed on each product page: −20 °C for most products; 2–8 °C for Tesamorelin, GLP-2T and GLP-3R.
We accept credit and debit cards, Apple Pay, Venmo, Cash App and cryptocurrency.
"For in-vitro laboratory research use only" means the compound is sold strictly for non-clinical scientific study in laboratory environments. Not approved by the FDA for human or veterinary use. It is not intended for human or animal consumption or any therapeutic application.
U.S.-based research peptide supplier
Excalibur Peptides is a U.S.-based supplier of research peptides for in-vitro laboratory use only. All 18 products are third-party tested, by HPLC for purity and by LC-MS for identity, and each certificate reports the compound name, purity percentage, identity result, testing laboratory, and test methodology. Orders placed before 2 PM EST on a business day ship the same day and are delivered domestically in 2–4 business days. Products are not intended for human or animal consumption.