Below are answers to frequently asked questions about Peptide California, our research guides, complimentary test kits, ordering process, and policies. If your question is not addressed here, please contact us at info@peptidecalifornia.com.
1. What does Peptide California sell?
Peptide California publishes and sells digital research guides covering topics in peptide science, life science research methodologies, and related fields. Every research guide purchase includes a complimentary test kit containing high-purity, research-grade peptide compounds corresponding to the guide’s subject matter. Test kit materials are designated “For Research Use Only” and are not approved by the FDA for any diagnostic, therapeutic, or clinical application. Test kit contents are not intended for human consumption, veterinary use, or incorporation into any product intended for human or animal use.
2. What is included in a complimentary test kit?
Each complimentary test kit contains research-grade synthetic peptide compounds relevant to the research guide purchased. Test kit materials are produced to high purity standards (typically >98% as verified by HPLC) and are used by scientists and researchers to study biological processes, molecular interactions, receptor binding, cellular signaling pathways, and other areas of life science inquiry. Each test kit is accompanied by a Certificate of Analysis (COA) documenting purity and identity.
3. Who can purchase from Peptide California?
Peptide California sells research guides with complimentary test kits exclusively to qualified purchasers who meet the requirements outlined in our Research Use Policy. Qualified purchasers include:
- Researchers affiliated with accredited universities, colleges, or research institutions.
- Personnel employed by licensed laboratory facilities.
- Independent researchers with relevant academic credentials (minimum bachelor’s degree in a life science, chemistry, biochemistry, or related discipline) and a documented research purpose.
- Authorized procurement agents acting on behalf of qualifying institutions.
We may request documentation to verify your qualifications, including institutional identification, laboratory credentials, or a description of your research application. We reserve the right to refuse any order if purchaser qualifications cannot be verified to our satisfaction.
4. Are test kit materials FDA approved?
No. None of the test kit materials included with Peptide California research guides are approved, cleared, or authorized by the U.S. Food and Drug Administration (FDA) for any use in humans or animals. Test kit materials are classified as research chemicals and are included exclusively for in vitro laboratory research purposes.
Test kit materials are not manufactured under current Good Manufacturing Practices (cGMP) applicable to drugs or biologics intended for human administration. They are manufactured under quality systems appropriate for research-grade reagents, with each batch undergoing analytical testing to verify identity and purity. All test kit materials are labeled “For Research Use Only. Not for human consumption.”
5. How do I verify test kit purity?
Every test kit included with a Peptide California research guide is accompanied by a Certificate of Analysis (COA) that documents the results of our quality control testing. Purity is typically assessed using one or more of the following analytical methods:
- High-Performance Liquid Chromatography (HPLC): The primary method used to determine peptide purity, expressed as a percentage.
- Mass Spectrometry (MS): Used to confirm molecular identity and molecular weight.
- Amino Acid Analysis: Verifies the amino acid composition of the peptide.
COAs are available for download on individual guide pages. If you wish to independently verify purity, you may submit the test kit materials to a qualified third-party analytical laboratory. If your independent results differ from our COA, please contact us within 14 days to initiate a COA dispute.
6. What is a Certificate of Analysis (COA)?
A Certificate of Analysis (COA) is a quality control document issued by the manufacturer or an accredited testing laboratory that reports the results of analytical testing performed on a specific production batch. Each COA issued by Peptide California for test kit materials typically includes:
- Compound Name: The name and catalog number of the peptide.
- Batch/Lot Number: A unique identifier for the specific production batch.
- Molecular Formula and Weight: The chemical identity of the peptide.
- Purity (%): As determined by HPLC analysis.
- Mass Spectrometry Data: Confirming the molecular weight and identity.
- Appearance: Physical description of the material (e.g., white lyophilized powder).
- Storage Conditions: Recommended storage temperature and conditions.
- Date of Analysis: When the testing was performed.
COAs serve as a critical reference document for researchers to verify that the test kit materials meet the specifications required for their experimental protocols.
7. How should test kit materials be stored?
Proper storage is essential to maintaining the stability and integrity of test kit compounds. General storage guidelines are as follows:
- Lyophilized (Freeze-Dried) Compounds: Store at -20°C or below for long-term storage. Lyophilized peptides are generally stable at 4°C (refrigerator temperature) for short-term storage of up to several weeks. Keep in a sealed container with desiccant to protect from moisture.
- Reconstituted Compounds: Once dissolved in solution, peptides should be aliquoted into single-use volumes to avoid repeated freeze-thaw cycles and stored at -20°C or below. Use sterile, bacteriostatic water or an appropriate buffer as recommended for the specific compound.
- Avoid Repeated Freeze-Thaw Cycles: Each freeze-thaw cycle can degrade compound integrity. Aliquoting upon reconstitution is strongly recommended.
- Protect from Light: Store test kit materials in opaque or amber containers, or wrapped in foil, to protect from photodegradation.
- Maintain a Dry Environment: Moisture is the primary degradation factor for lyophilized compounds. Ensure containers are tightly sealed with desiccant.
Specific storage conditions for each test kit are noted on the label and in the Certificate of Analysis. Always follow the product-specific recommendations provided.
8. Do you provide dosing or administration instructions?
No. Peptide California does not provide dosing guidelines, administration instructions, reconstitution protocols for human or animal use, or any information that could be construed as guidance for human or animal administration. Our research guides are educational publications, and test kit materials are included exclusively for in vitro laboratory research — they are not intended for human consumption or any form of in vivo administration.
We provide technical documentation relevant to laboratory research use, including Certificates of Analysis, recommended storage conditions, solubility data, and molecular specifications. For guidance on experimental protocols, researchers should consult peer-reviewed literature and their institutional protocols.
Any inquiries requesting dosing, injection, or administration guidance will not be answered, as doing so would be inconsistent with the research-use-only designation of our test kit materials.
9. What payment methods do you accept?
Peptide California accepts the following payment methods:
- Credit Cards: Visa, Mastercard, American Express, and Discover.
- Debit Cards: Debit cards with Visa or Mastercard logos.
- ACH/Bank Transfer: Available for institutional and high-volume orders. Contact us for wire transfer details.
- Purchase Orders: Accepted from verified academic and government research institutions with established credit. Contact us to set up a purchase order account.
All payment transactions are processed through PCI-DSS compliant payment processors. We do not store full credit card information on our servers. Prices are listed in U.S. dollars. Sales tax is applied where required by California state law.
10. Do you ship internationally?
No. At this time, Peptide California ships test kits exclusively within the United States (all 50 states and the District of Columbia). We do not ship to international destinations, U.S. territories, or APO/FPO/DPO addresses. Digital research guides are accessible from anywhere.
International shipping of research-grade test kit materials involves complex customs regulations, import/export controls, and cold-chain logistics that vary by country. We may consider international test kit shipping in the future. For updates on shipping availability, please check our Shipping & Handling page or contact us.
11. How do I request a COA for a specific test kit batch?
Certificates of Analysis for current test kit batches are available for download directly from each guide page on our Website. To request a COA for a specific batch:
- Check the Guide Page: Navigate to the research guide listing on our Website. If the COA for your test kit batch is available, you can download it directly.
- Email Request: If you need a COA for a specific lot/batch number that is not available on the guide page, email us at info@peptidecalifornia.com with the subject line “COA Request.” Include the guide name, catalog number, and the lot/batch number found on your test kit label.
- Response Time: COA requests are typically fulfilled within one (1) business day. The COA will be sent as a PDF attachment to the email address associated with your account.
We retain COA records for all test kit batches for a minimum of five (5) years. If you need a COA for a previously received test kit, we can retrieve it from our records using your order number or the batch number.
Still Have Questions?
If your question was not addressed above, please do not hesitate to contact our team:
Email: info@peptidecalifornia.com
Response Time: We respond to all inquiries within one (1) business day.
For questions about our compliance policies, please review our Research Use Policy, Terms of Service, and Privacy Policy.
This FAQ page was last updated on February 15, 2026. Information is subject to change. Please refer to our policy pages for the most current terms and conditions.