FAQ

Peptides are short chains of amino acids, the building blocks of proteins. They are produced naturally by the body and can also be synthesized in a laboratory. In research, synthetic peptides are used to study cell signaling, hormone pathways, tissue repair, metabolism, and other biological processes. They are not medicines, supplements, or foods; they are research tools.

Retatrutide is a synthetic research peptide that acts as a triple receptor agonist at the GLP-1, GIP, and glucagon receptors. It is one of the more thoroughly characterized investigational metabolic peptides in the published literature, which is why it is commonly used as a reference compound in receptor-binding and signalling assays. The retatrutide sold on Sacred Peptides is a laboratory reagent for research use only; it is not an approved drug, not a generic medication, and not for human or veterinary use.

All product descriptions, summaries, and research highlights are compiled from published scientific literature for educational and research-planning purposes only. They are not dosing instructions, medical advice, or treatment recommendations. Use this information to understand the background of a compound, design controlled experiments, and identify relevant literature. Do not use it to self-diagnose, self-treat, or make personal health decisions.

Prescription drugs are evaluated by regulators such as Health Canada or the FDA, manufactured under strict GMP rules, and approved for specific therapeutic uses in humans or animals. Research peptides sold on this site are investigational materials intended for in-vitro studies. They are not GMP pharmaceuticals, not approved for therapeutic use, and not equivalent to any brand-name medication.

No. Every compound listed on Sacred Peptides is sold strictly for in-vitro laboratory research. They are not drugs, supplements, cosmetics, or food, and they have not been evaluated by the FDA, EMA, or MHRA for human or veterinary use. Any human, animal, or diagnostic application is expressly prohibited by our terms of sale.

No. With the exception of clinical-stage molecules referenced in published literature (e.g. Retatrutide, Tirzepatide), most research peptides sold on this site are unapproved investigational compounds. Where a compound has an approved pharmaceutical counterpart, our product is not that pharmaceutical and is not manufactured to pharmaceutical GMP.

These are uncharacterized research chemicals and should be handled as such. Treat every compound as a potential irritant and sensitizer: work in a ventilated area, wear gloves and eye protection, and avoid generating airborne dust when handling lyophilized powder. Many sequences are hygroscopic and will take up moisture on an open bench, which degrades both mass accuracy and long-term stability. Growth-factor and mitochondrial sequences should be treated as biologically active in cell culture and contained accordingly. Review the safety data for each sequence and your institution's chemical hygiene plan before beginning work.

Purchases are restricted to qualified researchers, licensed laboratories, and academic institutions. By checking out you certify that you are 19+, that materials will be handled only in a controlled research environment, and that you accept full responsibility for compliance with the laws of your jurisdiction.

All compounds are synthesized by ISO-audited peptide manufacturing partners using solid-phase peptide synthesis (SPPS). Every batch is lyophilized under nitrogen, sealed in amber borosilicate vials, and quarantined pending third-party analysis before it is released to inventory.

Every lot is analyzed by an independent laboratory using reverse-phase HPLC for purity (at or above 99%) and mass spectrometry (MS) for mass confirmation. Certificates of Analysis are lot-matched and available on request; endotoxin and residual-solvent screening is performed on request for institutional orders.

Orders ship within Canada by tracked courier, dispatched from within Canada. Lyophilized peptides are stable at ambient temperature for the duration of a domestic shipment, so parcels are not shipped refrigerated. Standard delivery is 5 to 8 business days from dispatch; Express is 1 to 2.

Because these are controlled research materials, all sales are final once a vial has been opened. If a shipment arrives damaged, or if a Certificate of Analysis fails to match the vial, contact us within 7 days of delivery with photos and lot numbers and we will reship or refund at no cost.

Unreconstituted vials should be stored at minus 20 C in the dark; short-term storage at 2 to 8 C is acceptable for up to 60 days. Once reconstituted, peptides should be kept refrigerated at 2 to 8 C and used within the timeframe stated on the product page (typically 14 to 30 days).

Bacteriostatic water (0.9% benzyl-alcohol saline) is the standard diluent for most research peptides in vitro. Copper peptides (e.g. GHK-Cu) and certain hydrophobic sequences require sterile water or a specific vehicle noted on the product page. Never use tap water or non-sterile solutions.

Working concentrations in a research setting are derived from published literature, molecular weight, and the specific model system in use. Sacred Peptides does not publish human dosing guidelines, and our staff are not permitted to advise on personal use. Refer to the primary literature cited on each product page.

Under recommended storage (minus 20 C, protected from light), most sequences retain at or above 98% purity for 24 months. Reconstituted peptides are subject to hydrolysis and oxidation and should be assumed to lose 1 to 2% activity per week at 4 C.