Tesamorelin 20mg
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Compound Identity
COMPOUND NAME
Tesamorelin
SYNONYMS
TH9507, Egrifta®
CAS NUMBER
218949-48-5
MOLECULAR FORMULA
C221H366N72O61S
MOLECULAR WEIGHT
~5137.9 Da
STRUCTURE
Synthetic 44-amino acid peptide
PEPTIDE SEQUENCE
H-Tyr-D-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-NH?
CHEMICAL STRUCTURE

Molecular Formula: C221H366N72O61S
Source: PubChem
Mechanism of Action
Tesamorelin acts as a GHRH receptor agonist. It binds to pituitary somatotroph cells, stimulating the synthesis and release of endogenous GH. This leads to elevated IGF-1, promoting anabolic and lipolytic activity primarily in adipose tissue, particularly reducing VAT with minimal impact on subcutaneous fat.
GHRH Receptor (GHRH-R) Agonism
Stimulates pulsatile growth hormone (GH) secretion: Tesamorelin binds to GHRH receptors on a pituitary somatotrophs, increasing cyclic AMP (cAMP) levels and activating PKA and MAPK signaling pathways, resulting in physiologic GH release that mimics natural circadian pulsatility2,3.
Increases circulating IGF-1 levels: Endogenous GH released in response to tesamorelin upregulates hepatic IGF-1 production, leading to enhanced lipolytic, anabolic, and metabolic activity throughout peripheral tissues1.
Preserves feedback sensitivity: Unlike exogenous GH therapy, tesamorelin maintains the hypothalamic-pituitary feedback loop, allowing for regulation of GH and IGF-1 within physiologic ranges3,4.
Depot-selective lipolysis: The GH/IGF-1 signaling axis preferentially targets visceral adipose depots, promoting triglyceride hydrolysis and reduced VAT without significantly affecting subcutaneous fat or lean mass1,3.
Receptor Binding Affinity: Tesamorelin binds the GHRH receptor with high affinity, exhibiting similar potency to endogenous GHRH (IC?
?, Human = ~0.069 nM) and greater resistance to enzymatic degradation by DPP-IV2,3.
Biological Activity
Tesamorelin increases pulsatile GH and IGF-1 levels, reduces VAT, and improves lipid profiles and body image metrics in HIV patients. It shows minimal effect on glucose homeostasis but may slightly raise HbA1c in some users.
Storage
- 20°C or below. Protect from light and moisture.
Drug Categories
Peptides; Growth Hormone Secretagogues; Endocrine Modulators
Additional Notes
- FDA-approved for HIV-associated lipodystrophy
- Reduces VAT without worsening glycemic control
- Improves hepatic steatosis in HIV-associated NAFLD
Summary Table
Disclaimer
For Research Use Only. Not intended for human or veterinary use. This compound is supplied solely for laboratory and R&D purposes.
Detailed Product Description
Tesamorelin is a stabilized synthetic analogue of human growth hormone-releasing hormone (GHRH), comprising a 44-amino acid sequence with an N-terminal modification that enhances resistance to enzymatic degradation. Clinically, Tesamorelin is approved for the treatment of excess abdominal fat in HIV-infected individuals with lipodystrophy. This approval is based on consistent reductions in visceral adipose tissue (VAT) observed across controlled studies. The compound has also been evaluated in metabolic conditions related to HIV, including hepatic steatosis, with emerging evidence suggesting benefit in reducing intrahepatic lipid content and modulating fibrotic progression. Tesamorelin is intended for investigational and clinical use in the context of metabolic disorders characterized by altered fat distribution or growth hormone axis dysregulation. It is not indicated for use in the general population outside approved clinical settings.
Research Highlights
VAT Reduction:
Tesamorelin significantly reduces visceral adipose tissue (~15–20%) in HIV-associated lipodystrophy, with effects maintained over 52 weeks in continuous users.
Fat Selectivity:
Targets VAT with minimal impact on subcutaneous fat or lean mass.
Body Composition Benefits:
Treatment is associated with reductions in waist circumference and improvements in body image-related outcomes.
Liver Effects:
In HIV-associated NAFLD, tesamorelin reduces liver fat and attenuates fibrosis progression, supported by transcriptomic downregulation of fibrotic and inflammatory gene pathways.
Metabolic Profile:
IGF-1 levels rise predictably with treatment; glycemic effects are minimal, with only modest, clinically insignificant increases in HbA1c observed.
Pharmacokinetic Profile
Route of Administration
Subcutaneous
Dosing Frequency
Once daily
- Route of Administration: Subcutaneous injection
- Dosing Frequency: Once daily
- Half-Life: ~38 minutes in HIV+ patients2
- Formulation: Lyophilized acetate salt for reconstitution
Formulation & Handling
- Reconstitute lyophilized powder in sterile bacteriostatic water for injection (0.9% benzyl alcohol)
- Store reconstituted solution at 2–8°C and use within 14 days
- Unreconstituted vials should be stored at −20°C in a dry, light-protected environment
- Avoid repeated freeze-thaw cycles; aliquot as needed for stability
- Stable for up to 12 months when stored properly in lyophilized form
Clinical Trial Activity
References
Quality & Purity
This product is synthesized via solid-phase peptide synthesis (SPPS) and tested to ≥99% purity by HPLC with identity confirmed by mass spectrometry. A Certificate of Analysis (COA) is available for every batch. Learn about our full quality and testing process →
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