Tesamorelin is a synthetic analogue of full-length growth hormone-releasing hormone, GHRH(1-44), with a trans-3-hexenoyl group on its N-terminus that protects it from enzyme breakdown.

What is the difference between tesamorelin and sermorelin?

Both are GHRH analogues. Sermorelin is the 29-amino-acid fragment of GHRH. Tesamorelin is the full 44-amino-acid sequence, stabilised with a trans-3-hexenoyl group.

How is tesamorelin tested?

Every batch goes to an independent lab. The current batch was tested across three vials for purity (RP-HPLC), identity (LC-MS), net peptide content, endotoxins, heavy metals and sterility. Each batch's certificate of analysis is published on the lab results page.

How should tesamorelin be stored?

Keep the sealed vial in the refrigerator at 36–46°F (2–8°C), dry and away from light. As a freeze-dried powder it tolerates room temperature for weeks, which is why it ships without ice. Once reconstituted, keep it refrigerated between uses. More in our guide, Do peptides need to be refrigerated?

What sizes does tesamorelin come in?

Tesamorelin comes as a white lyophilized powder in 10mg and 20mg vials.

Is tesamorelin for human use?

No. Tesamorelin is sold for laboratory research use only.

10mg–20mg · 99%+ Purity

TESAMORELIN

Tesamorelin is a synthetic GHRH(1-44) analogue modified with an N-terminal trans-3-hexenoyl group.

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COA Tested 99%+ Purity Research Grade

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99.546% purity View COA

Certificate of Analysis

Tesamorelin 10mg · 3 vials tested by an independent lab · RP-HPLC / LC-MS

Batch 2026-TN650

Latest

99.546%

Average purity

Labeled content: 10mg
Net content: 11.11mg (+11%)
Vials tested: 3
Endotoxins: Pass
Heavy metals: Pass
Microbial sterility: Pass
Method: RP-HPLC / LC-MS
Tested: Jul 16, 2026

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Batch TN544

99.97%

Average purity

Labeled content: 10mg
Net content: 10.19mg (+2%)
Vials tested: 1
Endotoxins: Pass
Method: HPLC
Tested: May 5, 2026

View full COA

Compound Information

Chemical and structural properties

What it is

What is Tesamorelin?

Tesamorelin is a synthetic GHRH(1-44) analogue modified with an N-terminal trans-3-hexenoyl group.

Class: GHRH analogue (GHRH 1-44)
Also known as: TH9507
Form: White lyophilized powder
Use: Research use only

Molecular profile

Compound Structure

CAS number: 218949-48-5
Molecular formula: C221H366N72O67S
Molecular weight: 5136 g/mol
Amino acids: 44
Sequence: N-(trans-3-hexenoyl)-Tyr-Ala-Asp-Ala-Ile-Phe-Thr-Asn-Ser-Tyr-Arg-Lys-Val-Leu-Gly-Gln-Leu-Ser-Ala-Arg-Lys-Leu-Leu-Gln-Asp-Ile-Met-Ser-Arg-Gln-Gln-Gly-Glu-Ser-Asn-Gln-Glu-Arg-Gly-Ala-Arg-Ala-Arg-Leu-NH2

PubChem · CID 16137828

Storage

Storage & Stability

Store cold
Protect from light
Keep dry

Lyophilized (powder) 2–8°C (36–46°F) Refrigerate · −20°C for long-term storage

Reconstituted 2–8°C (36–46°F) Refrigerate · use within 28 days

Solubility: Soluble in bacteriostatic water

Tesamorelin Overview

A stabilised version of full-length growth hormone-releasing hormone.

Technical overview

Tesamorelin is all 44 amino acids of human GHRH with a trans-3-hexenoyl group attached to the N-terminal tyrosine. That addition protects it from DPP-4 breakdown and extends its activity at the GHRH receptor.

Research applications

Tesamorelin is studied in growth hormone and body-composition research, particularly visceral (abdominal) fat, liver fat and IGF-1 levels.

FAQs

What is tesamorelin?

Tesamorelin is a synthetic analogue of full-length growth hormone-releasing hormone, GHRH(1-44), with a trans-3-hexenoyl group on its N-terminus that protects it from enzyme breakdown.
What is tesamorelin studied for?

Tesamorelin is studied in growth hormone and body-composition research, particularly visceral (abdominal) fat and liver fat.
What is the difference between tesamorelin and sermorelin?

Both are GHRH analogues. Sermorelin is the 29-amino-acid fragment of GHRH. Tesamorelin is the full 44-amino-acid sequence, stabilised with a trans-3-hexenoyl group.
How is tesamorelin tested?

Every batch goes to an independent lab. The current batch was tested across three vials for purity (RP-HPLC), identity (LC-MS), net peptide content, endotoxins, heavy metals and sterility. Each batch's certificate of analysis is published on the lab results page.
How should tesamorelin be stored?

Keep the sealed vial in the refrigerator at 36–46°F (2–8°C), dry and away from light. As a freeze-dried powder it tolerates room temperature for weeks, which is why it ships without ice. Once reconstituted, keep it refrigerated between uses. More in our guide, Do peptides need to be refrigerated?
What sizes does tesamorelin come in?

Tesamorelin comes as a white lyophilized powder in 10mg and 20mg vials.
Is tesamorelin for human use?

No. Tesamorelin is sold for laboratory research use only.