All products listed on this website are intended exclusively for laboratory and in-vitro research purposes. They are not designed, manufactured, or approved for human or veterinary use, clinical diagnosis, or therapeutic applications of any kind.

No. We do not offer any guidance, recommendations, or instructions related to dosing, administration, or use in humans or animals. If you require such information, please consult a qualified medical or veterinary professional.

Certificates of Analysis (COA) confirming purity via HPLC testing and Safety Data Sheets (SDS / MSDS) may be available for applicable catalog items. Contact support if you need a specific document.

All shipments are prepared according to product handling requirements, which may include insulated packaging and cold-chain logistics when specified. Shipping availability and eligible destinations are governed by applicable regulations and carrier policies.

In-stock items are generally dispatched within 1–3 business days following successful order review and payment confirmation. Custom synthesis, bulk, or back-ordered items may require additional lead time — you will be notified of any delays.

Yes. We ship to most countries where peptide research materials are permitted. Delivery timelines for international orders may vary due to customs clearance and local import regulations.

Due to the specialized nature and strict storage requirements of research peptides, all sales are considered final once an order has been fulfilled and shipped. We do not accept routine returns, refunds, or exchanges on completed orders.

If your shipment arrives damaged, contains incorrect items, or is otherwise defective, please contact our support team immediately with your order number, photos of the issue, and a brief description. We will review and resolve eligible cases promptly.

Exceptions to the final-sale policy are made at the sole discretion of Tirzaslim on a case-by-case basis. Reach out to support as soon as possible for the fastest resolution.

All catalog peptides are verified to ≥99% purity via HPLC analysis. Each production batch undergoes mass spectrometry confirmation to ensure identity and consistency.