Frequently Asked Questions

A peptide is a short chain of amino acids linked together by peptide bonds. Amino acids are the fundamental building blocks of proteins, and peptides can be thought of as smaller, simpler structures compared to full proteins. In scientific and laboratory settings, peptides are studied for their structural, signaling, and biochemical properties. Peptides typically contain between 2 and 50 amino acids, while proteins consist of much longer and more complex amino acid sequences.

Peptides and proteins are closely related but not the same. Both are composed of amino acids linked by peptide bonds, but peptides are generally shorter chains (typically 2-50 amino acids), while proteins consist of much longer and more complex amino acid sequences that fold into specific three-dimensional structures. In scientific research, peptides are often studied as simpler models to better understand biological processes at a molecular level.

An amino acid is a single organic molecule that serves as a basic building block of peptides and proteins. A peptide is formed when two or more amino acids are linked together in a chain through peptide bonds. In simple terms, amino acids are individual units, while peptides are short chains made from those units. The 20 standard amino acids encoded by the genetic code can be arranged in countless sequences to form different peptides with distinct biological properties.

No. Peptides and steroids are fundamentally different types of compounds. Steroids are lipid-based molecules derived from cholesterol and have a distinct chemical structure and biological role. Peptides, on the other hand, are composed of amino acids and are structurally related to proteins. Because of these differences, peptides and steroids behave differently in biological systems and are studied for entirely separate scientific purposes.

"Research Use Only" (RUO) indicates that a product is manufactured and sold exclusively for use in scientific research, including in vitro studies, animal model investigations, and other preclinical laboratory applications. RUO compounds have not been approved by the FDA or any other regulatory body for therapeutic, diagnostic, or human consumption purposes. All peptides listed on our website carry this designation and must be used in accordance with applicable laws and institutional guidelines.

Most research peptides are manufactured through solid-phase peptide synthesis (SPPS), a method pioneered by Bruce Merrifield in 1963. In SPPS, amino acids are sequentially attached to an insoluble resin support, with each coupling step followed by deprotection and washing cycles. After the full sequence is assembled, the peptide is cleaved from the resin and purified — typically using reverse-phase high-performance liquid chromatography (HPLC). This process allows for precise control over sequence, length, and modifications such as acetylation or amidation.

Peptide purity is determined primarily through analytical HPLC (High-Performance Liquid Chromatography), which separates the target peptide from synthesis byproducts, truncated sequences, and other impurities. The purity percentage reflects the proportion of the desired full-length peptide relative to all detected species in the chromatogram. Additional methods such as mass spectrometry (MS) confirm molecular identity and weight. Our peptides maintain stringent purity testing standards, with the majority of products exceeding 98% purity.

Yes. Every batch includes a Certificate of Analysis (CoA) that documents the purity, identity verification (via mass spectrometry), and analytical results (HPLC chromatograms). Researchers may review these documents before purchase or request additional information through our support team. The CoA serves as the official quality documentation for each produced batch.

Yes, all products undergo independent third-party analysis to verify purity and identity. This independent verification ensures that the documented purity levels are accurate and trustworthy. The combination of in-house quality control and third-party testing provides the highest level of quality assurance for research materials.

Peptides are widely used in laboratory research because their defined structures allow scientists to study molecular interactions, biochemical pathways, and cellular processes in a controlled manner. Researchers may use peptides to investigate protein behavior, receptor interactions, tissue repair mechanisms, metabolic regulation, or analytical methods. Many bioactive peptides act as hormones, neurotransmitters, or growth factors, and studying their activity helps researchers understand the larger protein systems they interact with.

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. For the long-term storage of peptides, we recommend that peptides be stored as a solid powder. Lyophilized peptides stored at -20°C or lower experience minimal degradation. Peptides in solution are much less stable and are susceptible to degradation.

Most researchers reconstitute with bacteriostatic water or sterile acetic acid (for certain sequences). Use bacteriostatic water for initial reconstitution. Add solvent slowly down the vial wall. Do not shake — gently swirl until dissolved. Each peptide may have specific solubility characteristics; we recommend reviewing the product data sheet for peptide-specific guidance. To prevent any damage caused by repeated freeze-thaw cycles, we recommend only dissolving the amount of peptide needed for the immediate experiment.

Lyophilized peptides stored at -20°C typically maintain stability for 24+ months. Once reconstituted, store at 2-8°C and use within 30 days. Peptides containing methionine, cysteine, or tryptophan residues should have limited storage time in solution due to oxidation. These peptides should be dissolved in oxygen-free solvents where possible. Always follow proper laboratory storage procedures and avoid repeated freeze-thaw cycles.

As moisture greatly reduces the long-term stability of peptides, we recommend allowing the peptide to equilibrate to room temperature in a desiccator before opening the vial. This prevents condensation from forming inside the container. Once the peptide has been dispensed, any remaining peptide in the tube should be gently purged with anhydrous nitrogen, the container recapped, sealed with parafilm, and stored at -20°C.

All peptides are listed by total peptide content (mg). Bacteriostatic water and lab solutions are listed by milliliters (mL). The industry standard is to deliver peptides in lyophilized form and to state the delivery amount as the weight of the lyophilized powder. The gross weight contains the peptide of interest (including impurities), water, and trace amounts from the purification process. Always verify the theoretical molecular weight against the documented analytical report before performing laboratory calculations.

Browse our catalog, select your desired product and quantity, then click "Add to Cart." When ready, proceed to Secure Checkout to complete your purchase through our secure payment processor. You will receive an automated confirmation email upon successful completion. If you need help at any step, please contact our support team via WhatsApp or email for assistance.

We accept major credit cards (Visa, Mastercard, American Express, Discover) through our secure payment processor. We also support additional payment options including bank transfer and cryptocurrency in certain regions. For specific payment method questions, please contact our support team for the most current information.

There is no minimum order quantity. You may order as few or as many vials as you need for your research. Quantity discounts may be available for bulk orders; please contact us for pricing on larger quantities. We strive to make research-grade peptides accessible to laboratories of all sizes.

Orders can be modified or canceled before shipment. Once an order has been shipped, changes and cancellations are no longer possible due to the perishable nature of the products. If you need to adjust your order, please contact us as soon as possible after placing your order and we will accommodate changes where possible.

Contact our support team as soon as possible and we will update your shipping information. If your order has already shipped with incorrect details, you will need to wait until the package is returned to our facility before we can reship it. We cover reshipping fees for domestic orders. Please double-check your shipping address during checkout to avoid this situation.

Orders placed before 2:00 PM EST Monday through Friday typically ship the same day. Standard delivery is 2-3 business days. Orders placed after the cutoff time, on weekends, or on holidays will ship the next business day. Every order comes with tracking for your convenience, and tracking information is sent via email once your order ships.

Yes! Orders over $200 qualify for free standard shipping. Orders under $200 ship for a flat rate. Shipping rates vary depending on the destination and how quickly you need your order. You can see all available shipping options and delivery times at checkout. Expedited shipping options are also available for those in need of faster delivery.

Peptides are lyophilized, sealed under inert gas, and shipped with ice packs in insulated packaging. Lyophilized peptides are remarkably stable at room temperature for several weeks, and independent stability studies confirm no degradation occurs during standard transit times. Upon receipt, immediately transfer your peptides to -20°C freezer storage for long-term preservation.

Lyophilized peptides are remarkably stable at room temperature for several weeks. Independent stability studies confirm no degradation occurs during standard transit times, even if the cold pack is no longer frozen on arrival. However, if you have concerns about shipment conditions, contact us immediately and we will assess the situation. We stand behind our products and will replace any order that arrives in substandard condition.

We ship to most countries worldwide. While some exceptions exist due to restrictions, we do our best to make our products available globally. Customs delays and local import regulations are the responsibility of the recipient. Certain destinations may require additional documentation. Before ordering, please research your country laws, as research peptides may not be legal everywhere. Once you place an order, you are fully responsible for complying with all local laws and regulations.

Because these are perishable research compounds, we cannot accept returns once an order has shipped. However, we offer a quality guarantee: if a product arrives damaged, does not meet purity specifications, or is incorrect, we will replace it or issue a full refund. If a vial arrives damaged or with incorrect labeling, please contact support within 48 hours of delivery with photos. We will replace or refund at our discretion. Please review our full quality guarantee terms for detailed information.

You may contact our support team via WhatsApp for the fastest response, or by email. We typically respond within 24 hours on business days. Our support team is available to assist with product questions, technical guidance, order status, and general research-related inquiries. Visit our Contact page to reach us directly.

Contact us immediately if you receive a damaged product. We replace any products damaged during shipping at no charge, or issue a full refund. Please retain the packaging and take photos of the damage as this helps us improve our packaging and file appropriate claims with shipping carriers. Our goal is to resolve the issue as quickly as possible so your research is not delayed.

Yes. Lyophilized peptides sold explicitly "For Research Use Only" and not for human consumption are legally available to qualified researchers, institutions, and laboratories in most countries. Purchasers must be at least 21 years of age and use the products only for legitimate laboratory research in accordance with applicable institutional guidelines and local regulations. It is the customer responsibility to ensure compliance with local laws.

All our products are strictly for laboratory and in vitro/in vivo research by trained professionals. Safety profiles reported in scientific literature apply only to controlled experimental conditions, not to human administration. These compounds are not evaluated or approved for human use. Any product sold on our website is strictly for research purposes only and is not intended for human consumption under any circumstances. If any product is accidentally ingested, contact a healthcare provider immediately.