What are peptides?

A peptide is a short chain of amino acids, which are the building blocks of proteins. Peptides are smaller than proteins and typically consist of fewer than 50 amino acids. They play various roles in the body, such as serving as signaling molecules, hormones, or neurotransmitters. Peptides can have diverse functions, including regulating physiological processes, controlling appetite, promoting tissue repair, and modulating the immune system. Due to their versatility and potential therapeutic applications, peptides have attracted considerable attention in biomedical research and drug development.

What does lyophilized mean?

Lyophilization, commonly known as freeze-drying, is a process used to remove water from a substance while preserving its structure and biological activity. In this process, the substance is frozen and then subjected to low pressure, causing the frozen water to sublimate directly from solid to vapor without passing through the liquid phase. This results in a dry product with minimal damage to its structure and function. Lyophilized products have an extended shelf life and are often more stable than their liquid counterparts, making it possible to ship and store without refrigeration

What is your return policy?

Due to the nature of this industry we can never accept a return on an opened or used product. In special cases of unused peptides we may be able to accept your return. Please contact support to request a RMA and label be sent to you via email. Please also provide your original payment method. Be advised there will be a restocking fee of $10 which covers the cost of shipping and handling. Damaged peptides will not be refunded unless the damage occured while in transit to your address, and not from it.

Are peptides legal to purchase for research?

Yes. In the United States and most countries, lyophilized peptides sold explicitly “For Research Use Only” and not for human consumption are legally available to qualified researchers, institutions, and laboratories.

How do you guarantee purity?

Every batch undergoes independent third-party testing via High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry. Reported purity is ≥99.9% for all catalog items. Full Certificate of Analysis (CoA) with chromatograms is available for download via batch-specific QR code.

Do you provide Certificates of Analysis (CoA)?

Yes 100% of batches include a publicly accessible CoA. Researchers may request them via info@buylnpeptide.com.

How quickly do orders ship?

Orders placed before 1:00 PM EST (Monday–Friday) typically ship the same day. All domestic orders are sent via USPS Priority Mail (2–3 business days) or FedEx 2-Day with cold-chain packaging.

Do you ship internationally?

Yes. We ship to most countries. Customs delays and local import regulations are the responsibility of the recipient. Certain destinations may require additional documentation.

How are peptides shipped to maintain stability?

Peptides are lyophilized, sealed under inert gas, and shipped with ice packs in insulated packaging. Upon receipt, immediately transfer to -20°C freezer storage.

How should peptides be stored long-term?

Store lyophilized vials at -20°C in a non-frost-free freezer, protected from light and moisture. Properly stored, peptides remain stable for 3–5 years.

What is the best way to reconstitute peptides?

Most researchers reconstitute with bacteriostatic water or sterile acetic acid (for certain sequences). Always follow the specific recommendations listed on the product technical data sheet.