About Excalibur Peptides: who we are and how to check us
Excalibur Peptides is a U.S.-based supplier of lyophilized research peptides for in-vitro laboratory research, sold to signed-in research customers: a free account, age 21 or older, U.S. addresses only. Every product is tested by an outside lab, Freedom Diagnostics Testing, and anyone can open the current Certificates of Analysis (COAs) on the lab's own lookup page. Customers review us on Trustpilot, where the TrustScore was 4.6 out of 5 from 30 reviews on November 10, 2026.
Is Excalibur Peptides legitimate?
You can check the key facts yourself. Excalibur Peptides is a U.S.-based research peptide supplier. Every product is third-party tested by a named independent laboratory, Freedom Diagnostics Testing, and each Certificate of Analysis carries the code to look the report up on that lab's own site. 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. Support is by email at info@excaliburpeptides.com. The checks below start with two sources Excalibur Peptides does not control: the testing lab's own site and Trustpilot.
How to check Excalibur Peptides yourself
Excalibur Peptides can be checked in four steps, each done in a browser or by email.
- Check a report with the lab. Open Freedom Diagnostics Testing's COA lookup page and search "Excalibur Peptides": anyone can open the reports there without an account. Each current report names Excalibur Peptides as the client and is hosted on the lab's own site. The COA database on this site, which lists the reports by product, is for signed-in research customers; how our COAs work explains what each report shows.
- Read the reviews on Trustpilot. Open the Excalibur Peptides page on Trustpilot and read the reviews and their dates, not only the score.
- Read the written policies. The Shipping Policy, Refund Policy, Terms, Privacy Policy, Disclaimer and SMS Terms are public and need no account.
- Ask before you order. Email info@excaliburpeptides.com with any question.
How can I tell whether any peptide supplier is legitimate?
A peptide supplier can be checked on a short list of things, and you can apply the same list to us or to anyone else.
| Check | Why it matters | What a pass looks like |
|---|---|---|
| A COA that names the lab and reports purity and identity | An unnamed lab cannot be asked to confirm a report, and purity and identity are separate results, so a report should give both. | The report names the lab and gives purity by HPLC and identity by a method such as LC-MS or FTIR, for the specific product. |
| A way to look the report up with the lab | Without a lookup, the only copy you can see is the one the seller gives you. | The lab hosts the report, or confirms it under the supplier's name, using a code or company name printed on it. |
| Stated storage and shipping practices | Written practices can be checked against an order; unstated ones cannot. | Storage before shipping, the carrier, the delivery time and the cost are stated in plain terms. |
| Clear research-use-only terms | They say what the product is sold for, and what it is not. | The terms state in plain words that the product is for laboratory research and not for human consumption. |
| A contact address | A question about an order or a report needs somewhere to go. | An email address is published where you can find it, so you can write before you order. |
We do not rank suppliers, and this page makes no claim about any other company. How to verify a peptide COA explains the second check, confirming a report with the laboratory that issued it.
Where can I read reviews of Excalibur Peptides?
Reviews of Excalibur Peptides are on Trustpilot at trustpilot.com/review/excaliburpeptides.com, where the TrustScore was 4.6 out of 5 from 30 reviews on November 10, 2026.
Is excaliburpeptides.com safe to buy from?
The website excaliburpeptides.com is served over HTTPS, and card details are tokenized in your browser by our payment processor, so our servers receive only a payment token and never your card number. If your bank asks for verification (3-D Secure), it happens during checkout. That covers the website; for the company itself, use the four checks above.
What does Excalibur Peptides not do or claim?
Excalibur Peptides has the limits listed below.
Is the COA matched to my vial?
No. Each product has one current COA, issued for a sample the laboratory tested; it is not matched to individual batches or orders.
What do the reports cover?
Each current report covers purity by HPLC and identity by LC-MS.
Is the testing done in-house?
No. Every current COA is from a named independent third-party analytical laboratory: Freedom Diagnostics Testing.
Can I check out as a guest?
No. Every order is placed from a signed-in account with the research-use agreement on file.
Do you ship outside the U.S.?
No. Excalibur Peptides ships to U.S. addresses only.
Can I return an order?
All sales are final. Damaged or incorrect orders are replaced at no charge when reported with photos within 7 days of delivery; the Refund Policy has the steps.
Is there phone support?
No phone number is listed. Support is handled by email.
Are the products sold for human consumption?
No. They are for in-vitro laboratory research use only, not for human consumption, and are not approved by the FDA for human or veterinary use.
Who can order from Excalibur Peptides?
Excalibur Peptides sells to signed-in research customers: people 21 or older with a free research account and the research-use agreement on file. You create the account with an email address and password, or by continuing with Google or Apple. You accept the agreement once: you confirm being 21 or older and buying for in-vitro laboratory research use only, not for human or animal consumption, and you select a field of research. Age is confirmed at site entry and in the agreement, and may be required again at checkout, where a research-use certification applies to every order. The catalog, pricing, the cart and checkout need an account; this page, the COA overview, Contact and the policies do not. Create a free account.
Is it better to buy from a U.S. supplier than an overseas one?
Where a supplier is based does not show how a product was tested, so check the report whichever supplier you use. Excalibur Peptides is U.S.-based and ships only within the United States, by USPS Priority Mail with tracking; delivery typically takes 2–4 business days. The Shipping Policy has the full terms.
Excalibur Peptides at a glance
- Company
- Excalibur Peptides is a U.S.-based supplier of lyophilized research peptides for in-vitro laboratory research.
- Who can order
- Research customers 21 or older with a free account and the research-use agreement on file. Guest checkout is not available.
- Testing
- Every product is third-party tested by Freedom Diagnostics Testing (purity by HPLC, identity by LC-MS); signed-in research customers can open every COA in the COA database. How our COAs work
- Ships to
- All 50 U.S. states; no international shipping.
- Shipping
- USPS Priority Mail with tracking; delivery within the U.S. typically takes 2–4 business days. Orders placed before 2 PM EST on a business day ship the same day; later orders ship the next business day. $10 flat rate; free on orders of $150 or more.
- Payment
- We accept credit and debit cards, Apple Pay, Venmo and Cash App.
- Returns
- All sales are final. Damaged or incorrect orders are replaced at no charge when reported with photos within 7 days of delivery.
- Reviews
- TrustScore 4.6 out of 5 from 30 reviews on Trustpilot, as of November 10, 2026.
- Support
- Order support and COA questions: info@excaliburpeptides.com. Support is handled by email.
- Official website
- excaliburpeptides.com is the only Excalibur Peptides website. Any other address, including look-alike spellings of the name, is not ours.
- Use
- For in-vitro laboratory research use only. Not for human consumption. Not approved by the FDA for human or veterinary use.
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