FAQs
Find answers to common questions about our products and services.
Excalibur Peptides is a U.S.-based supplier of lyophilized research peptides for in-vitro laboratory research. It sells 18 research peptides and research compounds at excaliburpeptides.com, ships orders from Austin, Texas to addresses within the United States, and publishes a third-party Certificate of Analysis for every product in its COA database.
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.
Excalibur Peptides is a U.S.-based research peptide supplier. Orders ship from Austin, Texas, to addresses within the United States only. The company's mailing address is 19372 Ronald Reagan Blvd #310-444, Georgetown, TX 78628.
Email info@excaliburpeptides.com for order support, COA questions, documentation and Safety Data Sheet requests. Support is handled by email. The mailing address is 19372 Ronald Reagan Blvd #310-444, Georgetown, TX 78628.
Independent third-party Certificates of Analysis published in a public COA database, HPLC purity and identity testing (LC-MS), and U.S.-based fulfillment. Every product is made in fresh batches, then frozen and kept at −10 °F (about −23 °C) until the day it ships.
Lyophilized research peptides and research compounds for in-vitro laboratory use. The catalog lists 18 products: BPC-157, TB-500, Wolverine Blend, KLOW Blend, GHK-Cu, Tesamorelin, GHRP-6, GLP-2T, GLP-3R, MOTS-C, NAD+, LL-37, SS-31, Selank, Semax, DSIP, 5-Amino-1MQ and MT-2 (Melanotan II). Each product page lists the vial size, price, storage and the product's COA.
No. There is no corporate relationship between the two companies. Peptide Sciences stopped accepting orders in March 2026. Excalibur Peptides is a separate U.S.-based supplier whose catalog includes BPC-157, TB-500, GHK-Cu, Tesamorelin, GHRP-6 and NAD+, each third-party tested with its COA published.
Customer reviews of Excalibur Peptides are published on Trustpilot at trustpilot.com/review/excaliburpeptides.com. TrustScore 4.6 out of 5 from 32 reviews on Trustpilot, as of September 30, 2026.
We accept credit and debit cards, Apple Pay, Venmo, Cash App and cryptocurrency.
Yes. Checkout accepts credit and debit cards through one card payment option. Card details are tokenized in your browser by our payment processor; our servers receive only a payment token, never your card number. If your bank asks for verification (3-D Secure), it happens during checkout.
Yes. Apple Pay appears as a payment option at checkout in Safari on a device with Apple Pay set up.
Yes. You can pay by credit or debit card, Apple Pay, Venmo or Cash App; cryptocurrency is optional. Zelle is not one of the payment options at checkout.
Card details are tokenized in your browser by our payment processor; our servers receive only a payment token, never your card number. If your bank asks for verification (3-D Secure), it happens during checkout. The site is served over HTTPS.
Venmo and Cash App payments are checked by hand, and the order ships once the payment is verified. The payment details appear at checkout once you choose Venmo or Cash App.
Yes. Cryptocurrency payments go through NOWPayments: checkout creates an invoice priced in U.S. dollars, and you complete the payment on the NOWPayments page.
Enter a code in the "Discount code" box in the cart or at checkout. A code takes either a percentage or a fixed amount off, and some codes require a minimum order. Excalibur Peptides does not publish discount codes on the site; the email newsletter (sign-up in the footer) carries deals and research updates.
No. Prices are per vial with no volume tiers, and a research bundle costs the same as buying its products separately. Shipping is free on orders over $150.
Price per mg is the listed price divided by the milligrams on the vial label; for blends, it is divided by the total milligrams of all peptides in the vial. The compare page shows it with each product's specifications. It is a display figure based on the label amount, not on the amount measured on the COA.
A third-party Certificate of Analysis for the specific product that names the testing laboratory and reports purity by HPLC and identity by a method such as LC-MS or FTIR; a way to look the report up with the lab; stated storage and shipping practices; clear research-use-only terms; and a contact address. Excalibur Peptides publishes each of these on its product pages and in its COA database.
Orders placed before 2 PM EST on a business day are processed and shipped the same day; orders placed after the cutoff, on weekends or on federal holidays ship the next business day. Delivery within the United States typically takes 2–4 business days, with full tracking.
Shipping is a flat $10 on orders within the United States, and free on orders over $150.
We currently ship only within the United States and do not offer international shipping.
A tracking number is emailed to you when the order ships.
The shipping policy lists USPS and UPS as carriers. Every order is shipped with tracking.
No. There is no minimum order quantity.
Under the refund policy, an order can be cancelled within 1 hour of placement if it has not yet been processed. Email info@excaliburpeptides.com with the order number.
All sales are final — we do not accept returns. However, if your order arrives damaged or incorrect, we will replace it at no charge. Please contact us at info@excaliburpeptides.com with photos of the issue within 7 days of delivery.
Yes. All purchasers must verify they are 21 years of age or older before accessing our site or placing an order. This is confirmed at site entry and may be verified again at checkout, together with a research-use-only certification.
Every product is made in fresh batches, then frozen and kept at −10 °F (about −23 °C) until the day it ships. Compounds ship lyophilized in sealed, labeled vials, with tracking on every order.
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Yes. All 18 products are analyzed by an independent third-party laboratory, Freedom Diagnostics Testing. Purity by HPLC; identity by LC-MS (Freedom Diagnostics Testing). Each product's COA is published in our COA database.
All 18 products are tested by Freedom Diagnostics Testing: every current COA is from that lab (purity by HPLC, identity by LC-MS), names Excalibur Peptides as the client and is hosted on the lab's own site. Previous reports from earlier batches, issued by Freedom Diagnostics Testing and BTLabs, are listed for transparency under the current COA on the product pages and in the COA database.
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.
Start with the header: the testing laboratory, the client or customer, the sample or product name, the lot field, and the received, tested and reported dates. Then read the results: identity (LC-MS compares the measured molecular mass with the calculated mass; FTIR compares the infrared spectrum with a reference), purity by HPLC with its chromatogram, and the measured content in mg. Finally, note the lookup reference (a search code or certificate ID) and use it on the lab's own site to confirm the report.
Purity on a COA is the HPLC result: the area of the main peak, the intended compound, as a percentage of all peaks the detector records. It shows how much of the detected material is the target compound rather than related impurities such as truncated or deletion sequences. It is not a measure of the total content of the vial, and it does not cover substances the method does not detect, such as water, salts or excipients.
They answer different questions. HPLC (high-performance liquid chromatography) separates the components of a sample and reports purity as the main peak's share of the total. LC-MS couples liquid chromatography with mass spectrometry and confirms identity by measuring molecular mass against the value calculated from the structure. FTIR (Fourier-transform infrared spectroscopy) confirms identity by matching the sample's infrared spectrum with a reference. Each current Excalibur Peptides COA reports purity by HPLC and identity by LC-MS (some previous reports from earlier batches confirm identity by FTIR), and each product page names the methods used for that product.
Endotoxin testing measures bacterial endotoxins, the lipopolysaccharides from the outer membrane of gram-negative bacteria, usually with a Limulus amebocyte lysate (LAL) assay or a recombinant factor C assay, and reports the result in endotoxin units (EU). It is a separate test from purity and identity analysis. The current COAs published for Excalibur Peptides products report purity by HPLC and identity by LC-MS; endotoxin and sterility testing are not part of those reports or of the previous reports listed for earlier batches.
Yes. All 18 products are third-party tested; each product's COA is published in the COA database. Each current COA shows the HPLC purity result and identity confirmation (LC-MS). Previous reports from earlier batches are listed for transparency. You can view COAs on our COA Database page or request them by contacting us directly.
Published Certificates of Analysis are available on our COA database page, listed by product, without an account.
No. Each product has one current COA, issued for a sample the laboratory tested; it is not matched to individual batches or orders. Reports for earlier batches are listed below it as previous reports, marked as not the batch currently shipping. Each vial label carries its own printed batch ID.
Purity is measured by HPLC and reported on each product's Certificate of Analysis. Purity figures appear only on that certificate and next to the COA link on the product page and in the COA database.
Each current COA records the compound name, the date of analysis, the testing laboratory (named, not anonymous), the analytical methods employed (HPLC for purity; LC-MS for identity), the observed purity percentage, the identity result and the reference used to look the report up with the lab.
No. Every current COA is from a named independent third-party analytical laboratory: Freedom Diagnostics Testing. Previous reports from earlier batches were also issued by independent laboratories (Freedom Diagnostics Testing and BTLabs). The lab name is printed on each COA so it can be cross-referenced and audited.
Every product ships as a lyophilized (freeze-dried) powder in a sealed glass vial; none is sold as a liquid. Lyophilization removes water at low temperature and pressure, so the compound is kept as a dry solid.
Keep unopened lyophilized vials sealed and protected from light and moisture at the temperature listed on the product page: −20 °C for most products; 2–8 °C for Tesamorelin, GLP-2T and GLP-3R. Let a vial reach room temperature before opening so moisture does not condense on the lyophilized material, and avoid repeated freezing and thawing.
No. Excalibur Peptides does not publish shelf-life or expiry durations. The stability of a lyophilized compound depends mainly on temperature, moisture, light and repeated freeze–thaw cycles, so vials are kept sealed at the temperature listed on the product page.
The amount on the label, for example 10mg, is the nominal amount of compound in the vial. The COA reports the amount the laboratory measured in the tested sample, as net content or as content by HPLC in mg, so the measured figure can differ from the label amount. For example, TB-500 is labeled 10mg, and its COA reports 9.77 mg for the tested sample. For blends, the label lists each component (for example 10/10mg).
Each product is one sealed glass vial of lyophilized powder. The label carries the product name, size, a printed batch ID, a QR code and the line “For research and laboratory use only — not for human consumption.”
Yes. A Safety Data Sheet for any product can be requested by email at info@excaliburpeptides.com.
GLP-2T is the catalog name of a dual GIP/GLP-1 receptor agonist research peptide, and GLP-3R of a triple GIP/GLP-1/glucagon receptor agonist research peptide. In methods sections, cite the vendor name, the catalog name, the batch ID printed on the vial and the COA reference.
The Wolverine Blend combines BPC-157 and TB-500 in one lyophilized vial. The KLOW Blend combines GHK-Cu, BPC-157, TB-500 and KPV in one vial; KPV is sold only as part of the KLOW Blend. Each blend has its own third-party COA in the COA database.
Research peptides are short chains of amino acids used exclusively in laboratory and scientific research settings. They are not intended for human consumption, veterinary use, or any therapeutic application.
"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.
Excalibur Peptides sells its products in the United States as research chemicals for in-vitro laboratory research and identification. Not approved by the FDA for human or veterinary use. They are not sold for human consumption. Buyers must be 21 or older, confirm their age at site entry and certify research-use-only status at checkout, and every vial label carries a research-use-only line. Rules can differ by state and by institution. This is general information, not legal advice.
No. For research and identification purposes only. Not for human or veterinary use of any kind.
No — strictly for in-vitro laboratory research. The compounds are not approved by the FDA for human or veterinary use. Any other use is prohibited by our Terms of Service. All products are sold exclusively for bona fide laboratory research purposes, and buyers certify research-use-only status at checkout.
No. The site does not host preparation guides, calculators for human use, or any form of human-use documentation. Researchers design their experiments according to the published preclinical literature for the specific compound and their institution's review process.
Email info@excaliburpeptides.com for order support, COA questions and documentation requests.