Frequently asked questions.

Reference-grade materials are manufactured under controlled conditions with rigorous analytical verification at every stage. Each lot undergoes HPLC for purity quantification, mass spectrometry for molecular identity confirmation, and additional testing for sterility and residual solvents where applicable.

Our lot tracking system ensures:

• Every vial is labeled with a unique lot number printed directly on the label
• That lot number corresponds to a current, dated Certificate of Analysis specific to that production batch
• The same lot-specific purity percentage, quantity (mg), and analytical data appear on both the product page and the COA
• Complete traceability from synthesis through final product delivery

Every released COA is also published in our Certificates of Analysis library, so the evidence for each lot is reviewable before it ever reaches your bench.

Purity is quantified using HPLC (High-Performance Liquid Chromatography), the industry-standard method for peptide analysis:

• UV detection at 214 nm or 220 nm — the standard wavelengths for peptide bond absorption
• The purity percentage reflects the area under the main peak relative to all detected peaks in the chromatogram
• Values are reported as percentages (e.g., 99.2% by HPLC) and documented in the COA alongside the corresponding chromatogram

This transparency allows researchers to assess material quality and make informed decisions about experimental design.

Every lot is synthesized using standardized procedures and verified against defined acceptance criteria:

• Purity: 99%+ by HPLC
• Identity: confirmed by mass spectrometry at independent ISO-certified laboratories
• Physical appearance verified against defined specifications
• Lots that do not meet specifications are rejected and never released for distribution

We maintain batch records documenting synthesis parameters, purification steps, and analytical results. Reference samples are retained for retrospective analysis if questions arise.

• Orders are expected to be processed and shipped the next business day after payment confirmation
• Tracking included on every order
• Transit time depends on the carrier and service selected

Shipping timeframes are carrier estimates and not guaranteed. Processing may be delayed for verification, payment authorization review, or product availability issues.

No. We only ship to addresses within the United States. U.S. territories are served case-by-case upon verification.

Please note the following restrictions:

• No shipping to freight forwarders, mail forwarding services, or APO/FPO/DPO addresses
• Products may not be exported or re-exported outside the United States
• Orders with international shipping addresses will be cancelled and refunded, less any processing fees

All peptides are supplied as lyophilized powders in sealed glass vials labeled with product name, lot number, quantity (mg), and storage recommendations.

• Individual vials wrapped in protective foam and/or bubble wrap to prevent breakage
• Foil-lined or insulated mailers providing thermal protection from temperature extremes
• Additional protective materials and cushioning as needed

Temperature considerations: we do not offer temperature-controlled, refrigerated, or cold-chain shipping. Lyophilized peptides are stable at ambient shipping temperatures for short periods, which is standard practice for shipping research peptides in powder form. Upon receipt, immediately transfer to appropriate storage conditions (-20°C or colder).

A tracking number is provided once your order ships, and every shipment includes transit protection under our 60-day guarantee. If a package is lost, stolen, or damaged during carrier transit, you are covered.

To file a claim, notify us within 72 hours of the expected or actual delivery with unaltered photographic or video evidence, including:

• The outer packaging and inner packaging
• The vials
• Intact or broken seals

We will replace the product or issue a refund. You are responsible for monitoring tracking and being available to receive the package — for high-value orders, consider requesting signature confirmation at checkout.

Research materials cannot be restocked once they leave our facility, so we do not accept traditional returns or exchanges. Instead, every order is backed by our 60-day guarantee with shipment coverage included.

• Damaged or defective products: notify us within 72 hours of delivery with unaltered photographic or video evidence — we will replace the product or issue a refund
• Order cancellation: orders may be cancelled up to 2 hours after placement OR before a tracking number has been generated, whichever occurs first
• Once a tracking number is generated, the order can no longer be cancelled

Lyophilized peptides should be stored at -20°C or colder in original sealed vials until ready for use. For long-term storage (more than 6 months), -80°C is recommended.

• Store in a desiccated environment to prevent moisture absorption
• Protect from light by keeping vials in original packaging or amber containers
• Use freezers with continuous temperature monitoring and alarm systems
• Avoid repeated freeze-thaw cycles, which can cause aggregation or degradation
• Document any temperature excursions and assess material suitability

Lot-specific storage recommendations are included in the COA and may vary based on peptide sequence.

When stored properly (lyophilized at -20°C), most peptides remain stable for 12–24 months from date of manufacture. Specific expiration or retest dates are provided on the COA for each lot.

Stability is influenced by peptide sequence:

• Sequences containing methionine, tryptophan, or cysteine may be more prone to oxidation and have shorter shelf lives
• Post-expiration, material should be retested or disposed of according to your laboratory's quality protocols

All products are intended strictly for in vitro research use only. They are designed for:

• In vitro laboratory experiments and assays
• Analytical method development and validation
• Chemical characterization and reference standard preparation
• Quality control testing and assay development
• Academic and institutional research not involving human or animal subjects

Products are NOT intended for: human consumption, veterinary use, clinical applications, drug compounding, dietary supplements, cosmetics, therapeutic purposes, in vivo research, or any application involving living organisms.

• Our products have not been evaluated or approved by the FDA for any purpose
• They are research chemicals and laboratory reagents — not drugs, medications, dietary supplements, food additives, cosmetics, or medical devices
• Products are not intended to diagnose, treat, cure, or prevent any disease

NeuroPeptides is a chemical supplier providing research-grade reference materials. We are NOT:

• A compounding pharmacy or chemical compounding facility as defined under Section 503A of the Federal Food, Drug, and Cosmetic Act
• An outsourcing facility as defined under Section 503B of the Federal Food, Drug, and Cosmetic Act
• A pharmaceutical manufacturer
• A medical provider or healthcare entity
• A dietary supplement manufacturer

Products may be purchased by qualified individuals and organizations conducting legitimate scientific investigation, including:

• Academic and research institutions (universities, research centers)
• Government research laboratories and agencies
• Private research organizations and CROs
• Biotechnology and pharmaceutical companies
• Individual researchers with appropriate facilities
• Analytical testing and quality control laboratories

Verification requirements: we use a risk-based verification approach. Standard orders require basic account information and acknowledgment of our Terms of Service. Higher-risk orders may require enhanced verification including a research purpose description, facility information, credentials, or institutional affiliation documentation.

The purchaser assumes full responsibility for compliance with all applicable federal, state, and local regulations governing:

• The purchase and import of research chemicals
• Possession and use of the materials after delivery

Our responsibility is to provide high-quality, well-documented materials that meet our stated specifications. We do not provide guidance on applications outside the scope of laboratory research, and we do not assume liability for how materials are used after delivery.

No. Absolutely not. These requests fall outside the scope of in vitro research and we will not respond to them:

• We do not sell syringes, needles, or any injection supplies
• We do not provide dosing guidance, administration protocols, injection instructions, or any information related to human or animal use

Our products are lyophilized reference materials for in vitro laboratory research only. They are not drugs, they are not for injection, and they are not for consumption. Any inquiry suggesting intended human use, self-administration, or therapeutic application is a direct violation of our Terms of Service — orders associated with such inquiries will be declined and refunded, and repeat violations may result in permanent account restrictions.

If you are seeking medical treatment or peptide therapy, please consult a licensed healthcare provider or compounding pharmacy. We are a chemical supplier — not a pharmacy, not a medical provider, and not a source for self-medication supplies.

We provide technical support related to product specifications, storage, handling, and reconstitution, including:

• Assistance with solubility issues
• Interpretation of analytical data
• General laboratory best practices for reference materials

We do NOT provide:

• Guidance on in vivo applications or clinical use
• Dosing recommendations for any purpose
• Advice on applications outside controlled laboratory research
• Medical, therapeutic, or diagnostic consultation

Yes. We offer custom analytical services on a project basis, including:

• Amino acid analysis (AAA) for peptide content quantification
• Advanced MS techniques (MS/MS, MALDI-TOF) for sequence confirmation
• Stability studies under specific storage conditions
• Solubility profiling in various solvents or buffer systems
• Reanalysis of existing lots for verification or troubleshooting

Contact support with your specific requirements. Pricing and turnaround time depend on scope and complexity.