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 most studied investigational metabolic peptides in recent clinical trials, where it has shown large reductions in body weight and improvements in markers related to blood sugar and liver fat. 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.

Because these materials are research-grade, adverse-event data is limited to published preclinical and Phase 1/2 literature. Common findings across GLP-1 and metabolic peptides include nausea, injection-site reactions, and altered glucose response. Growth-factor and mitochondrial peptides carry theoretical risks around uncontrolled cellular proliferation. Always consult peer-reviewed literature before designing a study.

Purchases are restricted to qualified researchers, licensed laboratories, and academic institutions. By checking out you certify that you are 21+, 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 (≥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 in insulated mailers with reusable ice packs via expedited courier. Lyophilized peptides are stable at ambient temperature for the duration of shipping, but we cold-chain by default to preserve long-term potency. You should receive your parcel within 2–5 business days depending on destination.

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

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

Dosing in a research setting is 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 (−20 °C, protected from light), most sequences retain ≥98% purity for 24 months. Reconstituted peptides are subject to hydrolysis and oxidation and should be assumed to lose 1–2% activity per week at 4 °C.