Tesamorelin (1 Vial)

Description

Buy Tesamorelin online at PSPeptides in 5mg or 10mg lyophilized vials, verified at 99%+ HPLC purity with batch-specific Certificates of Analysis from independent third-party laboratories on every order. Tesamorelin is a 44-amino-acid synthetic analog of growth hormone-releasing hormone (GHRH), engineered from native GRF(1-44) with a trans-3-hexenoic acid N-terminal modification that resists DPP-IV enzymatic cleavage — the pharmacokinetic barrier that limits native GHRH to a research half-life of roughly 6-7 minutes. The result is sustained pituitary GHRH receptor activation with a research half-life of approximately 26-38 minutes.

For dosing protocols, reconstitution technique, and titration schedules, see the Tesamorelin dosage research guide. For the broader growth hormone axis research context, see the CJC-1295/Ipamorelin growth hormone research guide. This product page focuses on what ships, quality documentation, and sourcing considerations.

Mechanism at the Receptor Level

Tesamorelin binds and activates the GHRH receptor (GHRHR), a class B G-protein-coupled receptor expressed primarily on anterior pituitary somatotroph cells. Receptor activation triggers Gs-coupled adenylyl cyclase, elevates intracellular cAMP, activates protein kinase A, and stimulates growth hormone gene transcription and release. The downstream cascade produces pulsatile GH secretion mimicking natural physiology, which in turn drives hepatic IGF-1 production.

The compound’s defining pharmacokinetic feature is stability against dipeptidyl peptidase IV (DPP-IV) — the enzyme responsible for the sub-10-minute half-life of unmodified GHRH. The trans-3-hexenoyl group at the N-terminus sterically blocks DPP-IV cleavage, extending the research half-life to 26-38 minutes. This allows once-daily research dosing with sustained downstream IGF-1 elevation lasting substantially longer than the peptide’s plasma presence.

Published Clinical Research Base

Tesamorelin’s clinical program is unusually well-characterized for a growth hormone research peptide. The compound underwent Phase 3 development for HIV-associated lipodystrophy and received FDA approval in 2010 under the trade name Egrifta — one of the few GHRH-pathway peptides with completed Phase 3 human trial data and regulatory approval.

The pivotal trials (TH9506 and TH9507) enrolled over 800 participants and documented statistically significant reductions in visceral adipose tissue at week 26 compared to placebo, with sustained effects at week 52. Serum IGF-1 elevation in the treatment arm remained within physiological ranges — a distinguishing safety feature versus supraphysiological exogenous GH exposure. PubMed indexes the primary Tesamorelin literature, and ClinicalTrials.gov catalogs ongoing and completed trials.

Research Applications

Current Tesamorelin research protocols span four main areas:

• Visceral fat reduction research — the primary clinical validation pathway, examining GH-mediated lipolysis in visceral adipose tissue depots
• IGF-1 axis studies — sustained hepatic IGF-1 elevation from a GHRH pathway agonist, distinct from direct IGF-1 administration
• Body composition research — lean mass preservation and fat redistribution across aging and metabolic dysfunction models
• Cognitive research — GH and IGF-1 signaling effects on neurotrophic pathways; Tesamorelin’s pulsatile profile enables research into GH-mediated cognitive endpoints without exogenous GH confounders

Researchers designing multi-compound protocols often study Tesamorelin alongside adjacent GH-axis compounds. The weight loss peptide research guide covers the broader metabolic peptide landscape including GLP-1 agonists like Retatrutide. The peptide stacking guide covers multi-compound protocol design logic.

Vial Sizes and Pricing

The 10mg vial offers a lower per-milligram cost for extended research protocols. When you buy Tesamorelin online at PSPeptides, both sizes ship the same day (orders placed before 2 PM EST), free UPS 2nd Day Air on domestic orders. Zero processing surcharges on Affirm, Afterpay, Klarna, Apple Pay, Google Pay, or standard cards.

Reconstitution and Storage

Tesamorelin ships as lyophilized powder requiring reconstitution with bacteriostatic water ($9.99) before research use. The peptide reconstitution research guide covers step-by-step technique — slow addition of BAC water along the vial wall, gentle swirling until dissolution, no shaking. The free reconstitution calculator handles dose math with visual syringe diagrams.

Lyophilized Tesamorelin stores best at -20°C for long-term preservation, with 2-8°C refrigeration acceptable for 4-6 week research windows. Reconstituted solution should be refrigerated at 2-8°C and used within approximately 4 weeks. The peptide storage guide covers detailed stability protocols across the GH-axis peptide class.

Verified Quality Standards

Every Tesamorelin peptide batch at PSPeptides ships with third-party HPLC purity verification and mass spectrometry molecular identity confirmation. Batch-specific Certificates of Analysis from independent laboratories — not in-house verification — accompany every order. The peptide COA interpretation guide covers what to look for when researchers buy Tesamorelin peptide from any vendor: verify the COA is batch-specific (not generic), generated by an independent laboratory (not the manufacturer), and includes both HPLC purity data and mass spectrometry molecular weight confirmation.

US-based synthesis provides domestic regulatory oversight throughout the manufacturing and QC pipeline. Full Tesamorelin compound information is available on Wikipedia including historical development and regulatory history.

Sourcing Considerations

Researchers who buy Tesamorelin research peptide from a verified vendor gain access to consistent batch-to-batch purity — critical for reproducible research data. Impurities in research-grade preparations can confound both mechanistic and endpoint studies, making COA verification a methodological requirement rather than a nice-to-have. The research peptide supplier selection guide covers the full vendor vetting checklist.

PSPeptides publishes clear pricing (no hidden fees), same-day processing (including weekends), and 7-day-a-week research support via email at [email protected] or phone at (551) 284-2670. The peptide payment options guide covers the payment infrastructure comparison across the industry.

Frequently Asked Questions

What makes Tesamorelin different from other GHRH analogs?

The trans-3-hexenoyl N-terminal modification blocks DPP-IV enzymatic cleavage, extending research half-life from approximately 6-7 minutes (native GHRH) to 26-38 minutes. Tesamorelin is the only GHRH pathway peptide with completed Phase 3 human trials and FDA approval for a clinical indication.

How does Tesamorelin compare to CJC-1295?

Both activate the GHRHR receptor with similar downstream GH/IGF-1 effects. Tesamorelin has a shorter research half-life (~30 min vs. 6-8 days for CJC-1295 with DAC) but substantially more clinical trial data. Researchers preferring pulsatile GH physiology often select Tesamorelin; researchers needing extended single-dose activity often select CJC-1295 with DAC.

What research-grade purity does PSPeptides Tesamorelin ship at?

99%+ HPLC-verified purity with mass spectrometry molecular identity confirmation. Batch-specific Certificates of Analysis from independent third-party laboratories accompany every vial.

What vial sizes are available?

Two sizes: 5mg ($59.99) and 10mg ($89.99). Both are lyophilized powder requiring reconstitution with bacteriostatic water before research use. The 10mg vial provides a lower per-milligram cost for extended research protocols.

Where can researchers buy Tesamorelin online with COA verification?

Researchers can buy Tesamorelin online at PSPeptides with independent third-party HPLC COA documentation on every batch. Same-day processing, free UPS 2nd Day Air on domestic orders, and zero processing surcharges on Affirm, Afterpay, Klarna, Apple Pay, or credit cards.

All PSPeptides products are sold exclusively for research and laboratory use.