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Growth-Factor Research · Secretagogue Class

Tesamorelin: Research Overview

What is tesamorelin? Tesamorelin is a synthetic 44-amino-acid analog of growth-hormone-releasing hormone (GHRH) bearing a trans-3-hexenoyl modification at its N-terminus. Research-grade tesamorelin is studied in GHRH-receptor and growth-hormone-axis pharmacology; it is not the FDA-approved prescription drug Egrifta. It is sold strictly for laboratory research use.
VP Peptides Tesamorelin research vial with box
Actual VP Peptides product · Research use only
Human data available ≥99% HPLC purity COA with every batch 3rd-party tested Research use only
Molecule vs approved drug product

An FDA-approved pharmaceutical containing tesamorelin exists (Egrifta / Egrifta WR). That does not make a research-grade vial of tesamorelin an FDA-approved medicine. VP Peptides research material is not that approved drug product, is not manufactured to its specification, and is supplied strictly for laboratory research.

Technical profile

CompoundTesamorelin
ClassSynthetic 44-amino-acid GHRH analog with a trans-3-hexenoyl N-terminal modification
Molecular weight~5135.9 g/mol
Receptor targetGHRH receptor
Form suppliedLyophilized powder, sealed vial
StorageLyophilized: 2–8 °C, protected from light.
VerificationHPLC purity ≥99%, sterility, endotoxins, heavy metals — documented on the batch COA

Evidence at a glance

Research evidence is not one category. Human, animal (preclinical) and in-vitro / mechanistic data differ in strength — often sharply. VP Peptides separates them so no single line overstates the whole picture. Ratings are deliberately conservative and describe the published evidence base, not any effect in humans.

Human clinical
Limited
Animal / preclinical
Moderate
In-vitro / mechanistic
Moderate
Regulatory statusAn FDA-approved tesamorelin drug product of this molecule exists (Egrifta / Egrifta WR, for HIV-associated lipodystrophy), but the research material sold is not that approved product and is not for human use.
What remains unknown
  • Whether the research material matches the approved product in identity, purity or potency
  • Human efficacy or safety of the research material as sold for any non-approved use
  • Long-term human safety of the research material specifically

What does the research literature cover?

Tesamorelin occupies an unusual place in the secretagogue-class literature because a pharmaceutical form of the molecule went through full clinical development. Research-grade material is studied in the context of:

Important context: the clinical literature on tesamorelin concerns the pharmaceutical product developed under regulatory oversight — not research-grade material. Nothing on this page is a claim about effects in humans, and research-grade tesamorelin has no approved use.

Why purity matters for tesamorelin research

At 44 amino acids, tesamorelin is one of the longer peptides in the secretagogue class, and longer synthetic sequences carry a higher risk of truncation and deletion impurities. Every VP Peptides tesamorelin batch ships with a Certificate of Analysis documenting ≥99% HPLC purity, sterility, endotoxin and heavy-metal testing from independent third-party testing.

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Frequently asked questions

Is this the same as the prescription drug Egrifta?

No. Pharmaceutical tesamorelin is an FDA-approved prescription drug marketed as Egrifta, manufactured under pharmaceutical GMP and dispensed only by prescription. Research-grade tesamorelin is NOT that drug: it is laboratory material supplied for in-vitro and preclinical research only, and it may not be used in humans under any circumstances.

Is research-grade tesamorelin approved for human use?

No. Research-grade tesamorelin is not approved for human use in any jurisdiction. It is supplied strictly as a research chemical for laboratory investigation. It is not a drug, supplement, or food ingredient, and it is not a substitute for any prescription product.

How should tesamorelin be stored in the lab?

Lyophilized vials should be kept at 2–8 °C and protected from light.

What is tesamorelin's status in competitive sport?

Growth-hormone secretagogues and GHRH analogs, including tesamorelin, are listed as prohibited substances under the World Anti-Doping Agency (WADA) Prohibited List. This is noted for informational purposes only; VP Peptides materials are supplied solely for laboratory research.

GHRH / GH–IGF-1 axis science, in context

Tesamorelin belongs to the growth-hormone-releasing hormone (GHRH) family, and the research literature describes it as a stabilized analog of the endogenous 44-amino-acid hypothalamic peptide. In classical endocrine physiology, GHRH released from the hypothalamus binds the GHRH receptor on pituitary somatotrophs and prompts the pulsatile secretion of endogenous growth hormone (GH); circulating GH in turn drives hepatic and peripheral production of insulin-like growth factor 1 (IGF-1). This hypothalamic–pituitary–hepatic relay is commonly summarized as the GH–IGF-1 axis. Because tesamorelin acts upstream — stimulating the body's own GH release rather than supplying GH directly — it is characterized in the literature as a secretagogue, and its N-terminal trans-3-hexenoyl modification is described as conferring resistance to enzymatic breakdown relative to native GHRH, extending its usefulness as a tool compound in axis-signaling models.

The molecule's clinical pedigree is specific and narrow. A pharmaceutical formulation of tesamorelin is FDA-approved under the brand names Egrifta and Egrifta WR as a growth-hormone-releasing factor analog for the reduction of excess abdominal fat in patients with HIV-associated lipodystrophy, a use established through controlled trials of the drug product (Falutz et al., 2007; FDA label). That approval attaches to a regulated pharmaceutical manufactured to a defined specification — not to research-grade material. The tesamorelin supplied here is not that approved drug product, is not made to its pharmaceutical standard, and carries no approved indication; it is intended solely for in-vitro and preclinical laboratory research. The mechanistic and clinical summaries above describe the published record on the GHRH class and the pharmaceutical product; they are not statements about the research material or about effects in humans (Stanley & Grinspoon, 2012).

Selected research references

Related research compounds

Research use only. All products described on this page are furnished for laboratory research purposes only and are not for human or veterinary use, not for use in food or cosmetics, and not for any diagnostic or therapeutic application. Nothing on this page is medical advice or a claim of safety or efficacy in humans. Research summaries reference publicly available preclinical literature; specific citations are listed in the references above.