For in-vitro laboratory research use only. Not for human consumption. Pricing discussion below applies strictly to research material; this article is not a price guide for any therapeutic or human use.
Tesamorelin Cost & Research Pricing 2026: How Labs Evaluate Suppliers
Tesamorelin is a 44-residue GHRH analog with a trans-3-hexenoyl group on its N-terminal tyrosine (PMID 17214611). Among GHRH-class research peptides it is comparatively demanding to make and to characterize: a long sequence, a non-standard N-terminal modification and a large molecule to analyze all add cost. This guide explains what drives the cost per mg of tesamorelin research material, how to calculate price per mg, and which documentation to check before comparing listings.
Important: All compounds discussed are supplied strictly for in-vitro laboratory research use only. Not for human consumption or any form of administration. This page does not provide guidance of any kind for human or veterinary use.
How to Calculate Price per mg
Price per mg is the listed price divided by the milligrams on the vial label. Excalibur Peptides sells tesamorelin as a 10 mg vial, so its price per mg is the listed price divided by 10; the current price is shown on the tesamorelin product page, and the compare page shows the price per mg for each product. The figure is based on the label amount, not on the content measured on the Certificate of Analysis, so it is a starting point for comparison rather than a measure of documented material.
What Drives Tesamorelin Cost per Milligram
Four inputs explain most of the cost of well-documented research material:
- Synthesis difficulty — A 44-mer with an N-terminal non-natural acyl group is materially harder to synthesize than a 5–15-mer. Yield drops with each coupling step, and the trans-3-hexenoic acid modification adds a step of its own.
- Purification — Crude product from solid-phase synthesis contains truncated and deletion sequences. Removing them by preparative HPLC can require multiple passes, each with its own yield loss.
- Identity confirmation — Confirming identity, by LC-MS against the theoretical molecular weight (approximately 5135.9 g/mol) or by FTIR against a reference spectrum, adds analytical cost.
- Independent verification — Analysis by an independent laboratory, with a report that names the lab, is an additional analytical cost.
Only documentation can show that a vial contains the stated peptide at the reported purity, which is why the price of research material is best read together with its Certificate of Analysis.
What to Check on a COA Before Comparing Prices
Researchers comparing tesamorelin listings should look past the headline number and review the Certificate of Analysis (COA) published for the product. The fields that matter:
- HPLC chromatogram — A single dominant peak at the expected retention time, with the integrated area percentage reported. Shoulder peaks or late-eluting impurities suggest incomplete purification.
- Identity confirmation (LC-MS or FTIR) — For LC-MS, an observed mass that matches the theoretical value (approximately 5135.9 g/mol); for FTIR, a spectral match to the tesamorelin reference.
- Measured content — The amount of peptide the laboratory measured in the tested sample, reported as net content or as content by HPLC. Label mass and measured content are different figures.
- Laboratory, dates and lookup reference — The name of the testing laboratory, the test and report dates, and a reference (a search code or certificate ID) that lets the report be checked with the lab.
Endotoxin testing is a separate analysis. The COAs Excalibur Peptides publishes report purity and identity and do not include endotoxin testing, so cell-culture work that needs endotoxin data should plan for it separately. See the COA database for the format of the published reports.
How Researchers Frame the Pricing Question
Procurement decisions in research settings typically aim for the lowest total cost of valid data, not the lowest sticker price. That framework orders the inputs:
- Confirm that the analytical specifications meet the experimental requirement (HPLC purity appropriate to the assay, identity confirmation by LC-MS or FTIR).
- Confirm that the supplier publishes a Certificate of Analysis for the product before purchase.
- Compare price per mg among the listings that pass steps 1–2, keeping in mind the difference between label amount and measured content.
- Factor in processing and shipping times and how stock is stored before it ships.
The Bottom Line for Research Pricing
Tesamorelin is structurally and analytically more demanding than shorter peptides, so well-documented research material carries a real cost. Comparing price per mg is most useful among listings whose documentation already meets the study's requirements.
See the tesamorelin product page, the Buy Tesamorelin guide, the COA database, and the Tesamorelin Research Guide 2026 for the analytical and mechanistic context behind Excalibur Peptides' tesamorelin listing.
Frequently Asked Questions
How do I calculate the price per mg of tesamorelin?
Divide the listed price by the milligrams on the vial label. Excalibur Peptides sells tesamorelin as a 10 mg vial, so the price per mg is the listed price divided by 10; the compare page shows the figure for each product. It is based on the label amount, not on the content measured on the COA.
Why does tesamorelin cost more per mg than shorter research peptides?
Tesamorelin is a 44-residue peptide with an N-terminal trans-3-hexenoyl modification (PMID 17214611). The longer sequence, lower per-step yield and the non-natural N-terminal group all raise synthesis and purification cost compared with shorter peptides.
What should a tesamorelin COA include?
An HPLC chromatogram with the integrated area percentage, identity confirmation (an LC-MS mass that matches the theoretical value of approximately 5135.9 g/mol, or an FTIR spectral match), the measured content, the test and report dates, a named testing laboratory and a reference for looking the report up with that lab.
Is tesamorelin priced or sold for human use?
No. All tesamorelin from Excalibur Peptides is sold strictly for in-vitro laboratory research use only. Pricing discussion in this guide applies only to research material.
All compounds are supplied for in-vitro laboratory research use only. Not for human consumption. Pricing discussion above applies strictly to research material. Related: Tesamorelin Research Guide · Tesamorelin vs Sermorelin · Tesamorelin and Ipamorelin · Compound overview.