Frequently Asked Questions
About 13 Peptides
What is 13 Peptides?
13 Peptides is a US-based supplier of research-grade lyophilized peptides. We offer over 25 individual peptides and custom blends, each with a Certificate of Analysis (COA) verifying purity. All products are intended strictly for laboratory and research purposes.
What are research peptides?
Research peptides are synthetic or naturally-derived short chains of amino acids (typically 2-50 amino acids) used in scientific research. They are manufactured through solid-phase peptide synthesis (SPPS) and purified via HPLC to achieve research-grade purity, typically 98% or higher.
Are your peptides for human consumption?
No. All products sold by 13 Peptides are strictly for research and laboratory use only. They are not intended for human consumption, veterinary use, or any therapeutic purpose. We do not provide dosing instructions or medical advice.
Where is 13 Peptides located?
13 Peptides is based in the United States. We ship from Tennessee to customers throughout the continental United States.
Products
What peptides do you sell?
We offer over 25 research peptides including BPC-157, TB-500, Ipamorelin, Sermorelin, Tesamorelin, GHK-Cu, AOD-9604, Epithalon, NAD+, MOTS-c, PT-141, Melanotan 2, Thymosin Alpha-1, KPV, Glutathione, and Selank/Semax. We also offer custom blends like our Glow Blend (BPC-157/TB-500/GHK-Cu) and Klow Blend.
Do your products include a Certificate of Analysis?
Yes. Every product ships with a Certificate of Analysis (COA) that verifies identity and purity through HPLC (High-Performance Liquid Chromatography) and mass spectrometry testing.
What is lyophilization?
Lyophilization, also known as freeze-drying, is a dehydration process that preserves peptide stability for long-term storage. The process removes water from frozen peptide solutions under vacuum, resulting in a dry powder that maintains the peptide’s structural integrity.
What purity are your peptides?
Our research peptides are synthesized using solid-phase peptide synthesis (SPPS) and purified to research-grade purity, typically 98% or higher as verified by HPLC analysis. Each product’s specific purity is documented on its Certificate of Analysis.
How should research peptides be stored?
Lyophilized (unreconstituted) peptides should be stored at -20°C or colder for long-term stability, protected from light and moisture. Once reconstituted, peptide solutions should be refrigerated at 2-8°C and used within a reasonable timeframe depending on the specific peptide.
Ordering & Shipping
Do you ship internationally?
No. 13 Peptides currently ships to the continental United States only. We do not accept or fulfill international orders at this time.
What are your shipping options?
We offer ground shipping ($14 flat rate, 3-5 business days) and overnight shipping ($40 flat rate). Orders over $300 qualify for free ground shipping.
What payment methods do you accept?
We accept credit cards and Apple Pay through our secure payment gateway.
What is your return policy?
13 Peptides accepts returns and provides refunds in accordance with our posted Refunds and Returns policy. Please review our policy page for complete details on eligibility and process.
Quality & Testing
How do you ensure peptide purity?
All peptides undergo rigorous quality testing including High-Performance Liquid Chromatography (HPLC) for purity verification and Mass Spectrometry (MS) for identity confirmation. Results are documented on each product’s Certificate of Analysis.
What testing methods do you use?
We use HPLC (High-Performance Liquid Chromatography) to measure purity and Mass Spectrometry to confirm molecular identity. These are industry-standard analytical methods for peptide quality verification.
What is a Certificate of Analysis (COA)?
A Certificate of Analysis (COA) is a document issued by a quality testing laboratory that reports the results of testing performed on a specific batch of product. For peptides, a COA typically includes HPLC purity percentage, mass spectrometry confirmation, appearance, and batch identification.
All products sold by 13 Peptides are for research and laboratory use only. Not for human consumption. For research use only.