Peptide Research
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This website contains information about laboratory compounds intended strictly for qualified scientific use. You must be 21 years of age or older to enter.

⚠ For In Vitro Laboratory Use Only — Not for Human or Veterinary Use
Croix.
Peptides
In Vitro Laboratory Use Only
Laboratory-Grade Compounds

Precision
Peptide
Science

Croix Peptides supplies verified, high-purity polypeptide compounds to qualified laboratories and institutions. Every lot is independently analyzed prior to fulfillment.

Sold Strictly for In Vitro Laboratory Use — Not for Human or Veterinary Use
⚠ All compounds offered by Croix Peptides are supplied exclusively for qualified in vitro laboratory and research applications. Not intended for human consumption, clinical use, or veterinary administration. Purchaser assumes full responsibility for compliance with all applicable laws and regulations.

Available Compounds

All compounds are supplied exclusively for qualified in vitro laboratory applications. Certificate of Analysis available upon request.

Laboratory Integrity

Third-Party Verified

Every compound lot is independently analyzed by accredited third-party laboratories. Certificate of Analysis documentation is available for each product.

≥99% Purity

All polypeptide compounds meet a minimum purity threshold of ≥99% as confirmed by HPLC and mass spectrometry analysis.

Controlled Fulfillment

Temperature-controlled packaging and discreet shipment protocols maintain compound integrity from our facility to the receiving laboratory.

Regulatory Compliance

All compounds are supplied in accordance with applicable federal and state regulations governing the distribution of laboratory research chemicals.

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Shipping Information

⚠ By completing this order, the purchaser affirms they are 21 years of age or older, a qualified laboratory professional or researcher, and that all compounds will be used exclusively for in vitro laboratory applications in compliance with applicable laws and regulations. These compounds are not for human consumption, clinical use, or veterinary administration.

Order Summary

Subtotal$0.00
Shipping$12.00
CA Sales Tax (9.375%)$0.00

Total$0.00

⚠ Payment instructions provided upon order placement. All sales final. For laboratory use only.

Order Received
Your laboratory order has been submitted
Order Number
#AP-000000
Total Due
$0.00
Remit Payment

Please remit payment for the total amount above using any of the following methods. Include your order number in the payment memo.

Zelle(408) 427-5582
Venmo(408) 427-5582
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PayPal(408) 427-5582
📋 Reference order number #AP-000000 in your payment memo.

Orders are processed within 1–2 business days following confirmed payment. For inquiries contact croixpeptides@gmail.com

In Vitro Laboratory Use Only
Our Story

Built on
Precision
and Purpose

Croix Peptides was founded on a straightforward premise: the scientific community deserves access to high-purity polypeptide compounds without compromise on quality, transparency, or integrity.

We operate out of San Jose, California, supplying verified laboratory compounds to qualified researchers and institutions across the country. Every compound we carry is independently analyzed before fulfillment — because in laboratory science, purity is not negotiable.

Our Mission
"To advance the accessibility of verified, high-purity polypeptide compounds for the qualified scientific community — with uncompromising standards at every step."
≥99%
Minimum Purity Standard
16
Verified Compounds Available
COA
Available on Every Product

Our Core Values

01
Uncompromising Purity

Every compound we supply meets a minimum threshold of ≥99% purity, confirmed by independent third-party HPLC and mass spectrometry analysis. We do not cut corners on verification because your work depends on it.

02
Full Transparency

Certificate of Analysis documentation is available for every product we carry. We believe researchers should have complete visibility into the compounds they work with — no exceptions.

03
Competitive Accessibility

High-quality laboratory compounds should not come with inflated price tags. We price our catalog competitively and transparently so that purity and affordability are never in conflict.

04
Regulatory Integrity

We operate in full compliance with applicable federal and California state regulations. All compounds are supplied exclusively for qualified in vitro laboratory use, and we hold our customers to the same standard.

Ready to explore our catalog?

Browse our full range of verified laboratory compounds — from GLP-1 receptor agonists to growth hormone peptides and longevity compounds.

All compounds supplied by Croix Peptides LLC are intended exclusively for qualified in vitro laboratory applications. Not for human consumption, clinical use, or veterinary administration. These statements have not been evaluated by the Food and Drug Administration. © 2025 Croix Peptides LLC, San Jose, California.
In Vitro Laboratory Use Only

Support

Email Support

For order inquiries, COA requests, product questions, or any other assistance, reach us directly by email. We respond to all inquiries within one business day.

croixpeptides@gmail.com
Response time: Within 1 business day · Mon–Fri
Order Support

Have a question about an existing order? Email us with your order number (e.g. #AP-123456) and we'll get back to you as quickly as possible.

croixpeptides@gmail.com
Certificate of Analysis

Need a COA for a specific compound or lot? Email us with the product name and your order number and we'll send it over promptly.

croixpeptides@gmail.com
Payment Support

We accept Zelle, Venmo, Cash App, and PayPal. If you have any issues with payment or need to confirm receipt, contact us at the email below with your order number as reference.

croixpeptides@gmail.com
Zelle
(408) 427-5582
Venmo
(408) 427-5582
Cash App
(408) 427-5582
PayPal
(408) 427-5582
All compounds supplied by Croix Peptides LLC are intended exclusively for qualified in vitro laboratory applications. Not for human consumption, clinical use, or veterinary administration.