Tesamorelin
Reduces abdominal fat, enhances metabolic function, supports muscle maintenance, improves skin elasticity, enhance mental clarity.
Research Benefits
Available at
Pantheon Peptides
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What is Tesamorelin?
Tesamorelin is a synthetic analogue of human GHRH (Growth Hormone-Releasing Hormone) conjugated to a trans-3-hexenoic acid group that extends its stability and half-life. It is FDA-approved as Egrifta for the treatment of HIV-associated lipodystrophy — making it one of the most clinically validated GHRH analogues in existence.
Its approval for a specific fat distribution disorder highlights Tesamorelin's most studied property: preferential reduction of visceral adipose tissue (VAT) — the metabolically dangerous abdominal fat depot that is most strongly associated with cardiovascular risk.
Mechanism of Action
Tesamorelin binds GHRH receptors with high affinity, stimulating pulsatile GH release from the anterior pituitary. The trans-3-hexenoic acid conjugation increases resistance to dipeptidyl peptidase IV (DPP-IV) enzymatic cleavage, extending the functional half-life from 7 minutes (native GHRH) to approximately 30-40 minutes.
The downstream GH/IGF-1 elevation activates lipolytic pathways in adipose tissue, with research suggesting preferential effects on visceral fat depots compared to subcutaneous fat.
Key Research Findings
Visceral Fat Reduction
The pivotal clinical trials that led to Tesamorelin's FDA approval demonstrated significant reductions in visceral adipose tissue (measured by CT scan) over 26 weeks — averaging a 15-17% reduction in VAT. This effect was statistically robust and reproducible across multiple trials.
Metabolic Benefits
Beyond fat redistribution, Tesamorelin treatment showed improvements in triglyceride levels, cholesterol profiles, and insulin sensitivity markers — consistent with the metabolic benefits of reducing visceral adiposity.
IGF-1 Normalization
Tesamorelin reliably raises IGF-1 into the normal physiological range for age-matched healthy controls, providing a measurable biomarker for target engagement in clinical research.
Body Composition
Simultaneously with VAT reduction, Tesamorelin-treated subjects showed preservation or modest increases in lean body mass — the favorable dual body composition effect characteristic of GH axis optimization.
*For research use only. Not for human consumption.*
Research Use Only: This product is for laboratory research purposes only. Not intended for human consumption. Not approved by the FDA for any therapeutic use. Consult a qualified physician before any use.
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