In-vitro research materials — stocked and shipped in the USA
High-Purity
Research Peptides
- Every lot carries an HPLC report
- Analysed by an outside laboratory
- Tracked domestic delivery
Sold for laboratory research only. These materials are not drugs, not intended for human or animal use, and may be purchased only by universities, research institutions and other qualified laboratory buyers.
Shipped From The USA
Packed and dispatched from a domestic facility with tracking on every parcel. Delivery is free once an order passes $100.
Backed Against Your Own Test
Send a vial for independent analysis. Come back under our published number and we cover the order and the testing fee.
Consistent Lot Quality
Supplied lyophilized in sealed vials under inert gas, each lot matched to the chromatography report filed against it.
Straight Answers
We will confirm what is in a vial, which report belongs to it, and where your order is. Protocol and dosing questions we leave to you.
In stock now
Premium research peptides
GLP-1 / GIP / Glucagon (Retatrutide) 10mg
GLP-1 / GIP (Tirzepatide) 10mg
BPC-157 5mg
TB-500 (Thymosin Beta-4) 5mg
CJC-1295 (No DAC) 5mg
Ipamorelin 5mg
CJC-1295 + Ipamorelin Blend 10mg (5mg/5mg)
PT-141 (Bremelanotide) 10mg
Chromatography on file
A catalogue you can check before you commit to it
We keep lyophilized peptides and the consumables that go with them on hand for university groups, contract labs and independent researchers working in the United States. Nothing here is a therapeutic product — it is bench stock, and it is sold on that basis.
Purity is a number we have to earn. An outside laboratory runs the chromatography, and whatever it reports goes up on the product page as-is. If a lot underperforms, the figure you see reflects that, because we would rather lose the sale than quietly round it up.
What comes with every order
- The chromatogram for your lotIdentity and purity readings you can pull up and read, not a summary of them.
- An analyst with nothing to gainThe lab doing the testing has no stake in whether the number flatters us.
- A standing offer to be checkedRun your own assay. If ours overstated the lot, the order and your testing fee come back to you.
- Vials that survive the tripSealed under inert gas, tracked in transit, and free to ship once the order clears $100.
- A support desk that stays in its laneIdentity, contents, paperwork and shipping we will answer. How to run your experiment we will not.
Reordered most often
Most-requested research peptides
These are the lines that empty out fastest — the repair and matrix peptides, the incretin series, the thymosins and the bioregulators. Same footing as everything else in the catalogue: lyophilized, sealed, and shipped with its chromatography on file.
GLP-1 / GIP / Glucagon (Retatrutide) 5mg
GLP-1 / GIP (Tirzepatide) 5mg
GHK-Cu (Copper Tripeptide) 50mg
Tesamorelin 10mg
Melanotan 2 (MT-2) 10mg
Thymosin Alpha-1 5mg
Semax 30mg
Selank 30mg
Check our work
We pay for the test that proves us wrong
A purity claim is worth very little if the only party who can verify it is the one making the sale. So take a vial you bought here to a laboratory of your choosing and have it run. If the assay lands below the figure we published for that lot, you get the price of the vial back and the cost of the assay along with it — see the eligibility terms for what qualifies.
Shorter problems get shorter answers. Wrong item, cracked vial, or you cannot tell which report belongs to the vial on your bench — write in and we will sort it out.
- Compound
- Retatrutide 10mg
- Method
- RP-HPLC, UV 214nm
- Theoretical mass
- 4731.33 Da
- Observed mass
- 4731.40 Da
- Purity
- 99.64%
Representative result. The published test for each product is linked on its own page.
Browse the shelf
Shop by research pathway
Incretin and Metabolic Receptor Compounds
Targeted incretin mimetics, GLP-1, GIP, and Glucagon multi-receptor agonist research compounds.
GHRH and Ghrelin Receptor Peptides
Growth hormone releasing factor analogs, secretagogues, and somatotropic axis study peptides.
Extracellular Matrix and Cell-Migration Peptides
Cytoprotective, tissue remodeling, collagen synthesis, and angiogenic pathway peptides.
Melanocortin Receptor Peptides
Selective agonists of MC1R, MC3R, and MC4R pathways for endocrine and neuro-signaling research.
Mitochondrial and Senescence Peptides
Cellular longevity, cardiolipin-targeting peptides, and senolytic signaling regulators.
Neuropeptide and CNS Signaling Compounds
Neurotrophic signaling, BDNF modulation, and central nervous system receptor research ligands.
Antimicrobial and Cytokine-Pathway Peptides
Immune modulating peptides, antimicrobial host defense peptides, and cytokine cascade regulators.
GnRH and Kisspeptin Signaling Peptides
Hypothalamic-pituitary-gonadal (HPG) axis modeling and GPR54 receptor peptides.
Chromatin and Gene-Expression Peptides
Epigenetic modulators, telomerase activity peptides, and peptide bioregulators.
Laboratory Solvents and Supplies
High-purity bacteriostatic reconstitution solution, sterile vials, and laboratory prep equipment.
Laboratory Reconstitution Calculator
Calculate diluent volume, concentration, and insulin syringe unit markings
Research & protocols
From the laboratory notes
Peptide Reconstitution & Laboratory Storage Protocols (2026 Standard)
Comprehensive guide to proper reconstitution volume calculation, sterile handling, and cold-chain stability for lyophilized research peptides.
Read article
Understanding HPLC & Mass Spectrometry Purity Analysis in Research Compounds
How Reverse-Phase HPLC and ESI Mass Spectrometry ensure >99% purity and accurate sequence molecular mass confirmation in laboratory research.
Read article
GHRH & GHRP Receptor Synergy in Cellular Endocrine Models
Detailed review of somatotropic signaling pathways, GHRH receptor activation, and GHS-R1a ghrelin receptor pathway crosstalk in cell culture models.
Read articleBefore you order
What buyers usually want to know first
Who is eligible to purchase peptides from USA Peptide Depot?
Our compounds are strictly for laboratory in-vitro research purposes only. They are not intended for human consumption, clinical use, or veterinary applications. Purchases are restricted to research institutions, university labs, corporate R&D facilities, and qualified independent laboratory researchers.
How do volume and bulk discounts work?
Tiered bulk pricing is automatically calculated in your cart: 1-2 vials at standard price, 3-4 vials receive 10% off, 5-9 vials receive 15% off, and 10+ vials receive 20% off. You can also mix and match within the same category for tiered rates.
How is product purity verified?
Every single peptide batch undergoes rigorous third-party analytical testing including Reverse-Phase High Performance Liquid Chromatography (RP-HPLC) and Electrospray Ionization Mass Spectrometry (ESI-MS). Each product page links directly to its full Certificate of Analysis (COA) showing purity ratings consistently exceeding 99%.
What form do the peptides arrive in?
All our research peptides are supplied as sterile, lyophilized (freeze-dried) powder sealed in premium glass vials with flip-off aluminum crimp caps under inert argon/nitrogen atmosphere for maximum chemical stability.
What are your domestic shipping options and timelines?
All orders ship directly from our climate-controlled USA warehouse facility via USPS Priority or FedEx 2-Day with live tracking. Orders placed before 2:00 PM EST ship same-day. Orders over $100 automatically qualify for Free Tracked US Shipping.
How are sensitive peptide shipments packaged?
Lyophilized peptides are shipped in thermal insulated bubble mailers with protective cushioning. In their lyophilized state, high-purity peptides maintain structural integrity at room temperature during transit.