Name: Tirzepatide 40mg (10 Vials / Kit)
Brand: HK Peptide
SKU: HK-TR40
Price: 220.00 USD
Availability: InStock

Tirzepatide at a glance

Tirzepatide, developed under the code LY3298176, is a synthetic 39-residue peptide whose backbone is modeled on glucose-dependent insulinotropic polypeptide, with substitutions that also give it activity at the GLP-1 receptor. A fatty diacid side chain attached through a linker lets the molecule bind serum albumin, which slows its clearance. Its molecular formula is C225H348N48O68, with a molecular weight of roughly 4813.5 g/mol, and listings here supply it as a freeze-dried powder for laboratory work.

Price and availability

A kit of 10 vials at 40mg each (400 mg in total) from HK Peptide, shipped from Hong Kong, Hong Kong. At $220.00 for the kit, that works out to $0.55 per mg. Across 22 brands listing Tirzepatide here, the middle half of prices falls between $0.475 and $1.00 per mg; this kit is inside that range. Funds stay in escrow and are released to HK Peptide only when you mark the order as received.

This listing: HK Peptide Tirzepatide

Brand: HK Peptide
Kit: 10 vials × 40 mg (400 mg in total)
Price per vial: $22.00
Price per mg: $0.55
Other strengths: 5mg $50.00 · 10mg $75.00 · 15mg $100.00 · 20mg $130.00 · 30mg $155.00 · 45mg $250.00 · 50mg $275.00 · 60mg $300.00
Also sold by: JP 40mg $132.60 · TFC Peptides 40mg $125.00 · Uther Peptide 40mg $220.00 · Cyprus Peptides 40mg $473.00 · Zhejiang Peptide Co. Tirzepatide $175.00 · Lilipeptide Tirzepatide $47.00

Lab testing

HK Peptide published a Janoshik #114378 report for this compound. Test: Purity & Content (HPLC). Result: 99.86% purity · 134.15 mg. Tested Mar 12, 2026. The vial tested was a different strength than this listing, so treat it as evidence for the compound and ask for the batch COA for this exact strength. Verification key LY9VV176Q9HS can be checked at janoshik.com.

View the report · How to read it (Testing 101) · Every report for this compound

Bought through escrow: the brand is only paid after you confirm delivery. If the parcel never arrives, or an independent test shows the wrong compound or a significant under-fill, open a claim before releasing payment.

What it is studied for

Researchers describe tirzepatide as an imbalanced dual agonist: in published receptor assays it shows comparatively strong GIP-receptor activity alongside more modest GLP-1-receptor engagement. Both targets are class B G protein-coupled receptors that signal largely through cAMP. In metabolic models, this combined input is studied for glucose-dependent insulin release from pancreatic beta cells, reduced glucagon output, delayed stomach emptying and central effects on appetite circuits. Whether GIP-receptor activity contributes something distinct, for example in fat tissue, or partly acts through receptor desensitization remains an open and actively debated question in the literature.

Research and regulatory status

Few compounds sold as research peptides have a clinical record this extensive. A large late-stage trial program supported regulatory approvals for type 2 diabetes and, later, for chronic weight management, and further studies have examined obstructive sleep apnea, fatty liver disease, heart failure and cardiovascular outcomes. That record belongs to the pharmaceutical product, however. Vials listed on GLP1 Forum Escrow are research-grade material for laboratory study, and their quality depends on the individual brand, which is why third-party test reports matter.

Checking the lab data

A credible report should show a mass-spectrometry result consistent with the expected mass of about 4813.5 Da; the lipidated side chain makes truncated or incompletely modified material comparatively easy to spot. HPLC purity should be stated as a percentage with the chromatogram attached, not just a pass mark. Look for measured peptide content per vial compared with the label claim, plus a uniform white lyophilized cake and a batch number and test date that match the vial.

This listing has an independent lab report attached; the testing panel above summarises what the tested sample contained against its label.

Listing details

Compound: Tirzepatide
Synonyms: LY3298176
Class: Dual GIP / GLP-1 receptor agonist
Format: Lyophilized (freeze-dried) powder
Molecular formula: C225H348N48O68
Molecular weight: ~4813.5 g/mol
Vial strength: 40mg
Vials per kit: 10
Total content: 400 mg
Price per mg: $0.55
Sold by: HK Peptide
Ships from: Hong Kong, Hong Kong
Lab report: Independent report attached

Storage and preparation

Keep unopened freeze-dried vials cold, sealed and out of the light; moisture is what degrades a lyophilized cake fastest. After reconstitution, refrigerate the solution and work within the stability window your protocol sets.

Concentration arithmetic: one 40 mg vial dissolved in 2 mL gives 20 mg/mL, or 40 mg/mL in 1 mL. The Research Lab calculator in your dashboard handles any other volume.

Buyer questions

Why does tirzepatide carry a fatty-acid side chain?

The lipid modification lets the peptide attach reversibly to albumin in blood, shielding it from rapid kidney filtration and enzymatic breakdown. For laboratory work it also matters because the side chain affects solubility and chromatographic behavior, so analytical methods designed for unmodified peptides may need adjusting before results are comparable.

How can buyers compare tirzepatide listings from different brands?

Price per milligram is the simplest starting point, but it only means something when paired with a recent third-party report showing identity and purity for the same batch. On GLP1 Forum Escrow, payment stays in escrow until delivery is confirmed, which gives buyers time to check that the vial and its paperwork match.

How much Tirzepatide is in this listing?

10 vials of 40mg each — 400 mg in all. Where a lab report exists, the testing panel above shows what the brand's tested sample actually measured.

What if the parcel never arrives?

Open a claim from your order page. The payment is still in escrow at that point, so a claim decided in your favour is refunded to your Escrow Wallet.

Supplied for laboratory research only. Not for human or veterinary use, and not a substitute for any prescription medicine. Nothing on this page is medical advice.