Tesamorelin is a synthetic 44-amino-acid analogue of human growth hormone-releasing hormone (GHRH). A hydrophobic modification at the N-terminus improves resistance to enzymatic degradation while preserving activity at the GHRH receptor. In experimental systems, receptor activation stimulates pituitary growth-hormone release and downstream insulin-like growth factor-1 signaling. Tesamorelin is also the active ingredient in an FDA-approved prescription product for a narrowly defined clinical indication; VESPR’s catalog material remains a separate researchuse-only product and must not be represented as that approved drug.
Tesamorelin
Buy One, Get One FREE!
Research material
Metabolic Research Compound
Research identityResearch identity Tesamorelin; GHRH analogueCompound classSynthetic peptide; GHRH-receptor agonistMolecular formulaC221H366N72O67SApprox. molecular mass~5,135.9 DaSequence length44 amino-acid residuesPhysical formLyophilized research material; confirm current presentationAnalytical controlsIdentity and purity should be verified by lot-specific COA, typically using mass spectrometry and chromatographic methodsStorageFollow the product label and lot-specific documentation; protect from heat, moisture, and light and minimize freeze-thaw cycling

Current VESPR release
Tesamorelin, presented with clarity from selection to order.
Clearly identified
Material and selected strength remain easy to recognize throughout the order.
Built for comparison
Refer to the available lot-specific COA for analytical results.
Order visibility
Strength, price, quantity and every BOGO selection are kept together.

Compliantly sourced. USA manufactured. USA Lab Tested.
Defined material
The product name format and image are clearly identified.
Current-lot context
Each batch is presented with a COA from a USA based, compliant and certified testing facility.
Analytical results
Refer to the available lot-specific COA for analytical results.
The VESPR standard
Why choose VESPR?
Compliantly sourced. USA manufactured. USA Lab Tested.
Find Your ProductMaterials are sourced from facilities operating under documented quality-management standards.
Each product follows controlled processing, filtration and internal quality-assurance procedures.
Current lots are evaluated for quality and purity through independent analytical review.


Sourced from facilities that follow documented quality standards and controlled production.

Processed and filtered under controlled internal quality-assurance protocols.

Each vial is independently tested for quality and purity by an approved U.S. laboratory.
Your Clear Research Path
Four current VESPR materials, presented for quick comparison and a more focused start to your order.
Shop allFind the answer you need.
Frequently Asked Questions
Tesamorelin is a synthetic analogue of human GHRH designed to retain GHRH-receptor activity while resisting rapid enzymatic breakdown.
Research generally focuses on GHRH-receptor activation, pituitary GH secretion, and downstream IGF-1 signaling.
No. The catalog item is sold only as a laboratory research material. It should not be described or used as a prescription product.
Confirm vial strength, salt form, purity, identity, storage conditions, and any excipients from the current label and lotspecific COA.
No. Human or veterinary dosing and administration guidance is outside the scope of a research-only product page.
All VESPR products are sold for research use only. They are not intended for human consumption, therapeutic, or diagnostic use. Our peptides are designed exclusively for controlled laboratory research, educational studies, or analytical testing. Every product label and supporting document clearly reflects this compliance standard.

Your research starts here.
Small-batch availability can change. Browse our current library, select your strength, and manage each BOGO selection in the cart.
Choose Your Vials For laboratory and research use only. Not for human consumption.




