Name: Tesamorelin 5mg (10 Vials / Kit)
Brand: HK Peptide
SKU: HK-TSM5
Price: 90.00 USD
Availability: InStock

What is Tesamorelin?

Tesamorelin is a synthetic analogue of human growth hormone-releasing hormone with a trans-3-hexenoyl group added to its N-terminus, a modification that increases resistance to enzymatic breakdown while preserving activity at the GHRH receptor. It is the active ingredient in an approved medicine, used clinically for a specific indication.

How it is understood to work

It binds pituitary GHRH receptors to stimulate pulsatile growth-hormone secretion, which drives a downstream rise in IGF-1. Because it works through the body’s own GHRH axis rather than bypassing it, normal feedback regulation of GH release is preserved, distinguishing this mechanism from direct administration of growth hormone itself.

Research status

Tesamorelin has been studied extensively in human clinical trials for its effects on visceral adipose tissue, hepatic fat, lipid profiles and body composition, giving it a stronger clinical evidence base than most peptides in this catalogue. It is also used in broader preclinical research into GH-axis function and age-related metabolic change.

This listing: HK Peptide Tesamorelin

Brand: HK Peptide
Kit: 10 vials × 5 mg (50 mg in total)
Price per vial: $9.00
Price per mg: $1.80
Other strengths: 10mg $150.00
Also sold by: Uther Peptide 10mg $145.00 · Uther Peptide 20mg $280.00

Lab testing

HK Peptide published a Janoshik #152644 report for this compound. Test: Purity & Content (HPLC). Result: 99.37% purity · 10.55 mg. Tested Apr 29, 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 N3ZD4G7XHWN1 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.

Specifications

Compound: Tesamorelin
Also known as: TH9507
Class: Growth hormone-releasing hormone (GHRH) analogue
Form: Lyophilized (freeze-dried) powder
Per vial: 5mg
Molecular formula: C₂₂₁H₃₆₆N₇₂O₆₇S
Molecular weight: 5135.9 g/mol
Stated purity: ≥99% (HPLC)
Appearance: White lyophilized powder

Handling & storage

Supplied as a lyophilized powder; keep unopened vials frozen and protected from light, and once reconstituted with bacteriostatic water, store refrigerated and use within the timeframe set by your protocol.

Concentration check: adding 2 ml of bacteriostatic water to one 5 mg vial gives 2.5 mg/ml. The Research Lab calculator in your dashboard works this out for any volume.

Questions

Is tesamorelin an approved drug?

Yes, tesamorelin is the active ingredient in an FDA-approved medicine for a specific clinical indication; here it is supplied unformulated as a research material rather than in that approved dosage form.

How does tesamorelin differ from directly administered growth hormone?

Tesamorelin stimulates the pituitary to release the body’s own growth hormone through the natural GHRH pathway, preserving feedback regulation, whereas direct growth-hormone administration bypasses that pathway and its regulatory feedback entirely.

How much Tesamorelin is in this kit?

10 vials of 5 mg each, so 50 mg in total. The lab testing section above shows what the brand’s tested vial actually contained.

For laboratory research use only. Not for human or veterinary use. Nothing on this page is medical advice.