Tesamorelin
Tesamorelin
BUNDLE & SAVE
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Domestic ground, cold-chain packed. International rates at checkout.
Description
Tesamorelin is a sophisticated analog of human growth-hormone-releasing hormone (GHRH), specifically designed to enhance the secretion of growth hormone (GH) with remarkable specificity and pharmacological efficacy. It stands out in its class by virtue of its structural modifications and receptor-targeting precision. Tesamorelin is a 44-amino acid peptide that includes a strategic trans-3-hexenoyl modification at its N-terminus, which significantly improves its affinity for the GHRH receptor on somatotroph cells in the anterior pituitary gland. This receptor, a G-protein-coupled receptor (GPCR), specifically binds GHRH and its analogs, activating intracellular signaling cascades that are crucial for GH synthesis and release.
Binding of Tesamorelin to the GHRH receptor triggers the exchange of GDP for GTP on the Gs protein associated with the receptor, leading to the activation of adenylate cyclase. The resultant increase in cyclic AMP (cAMP) levels activates protein kinase A (PKA), which phosphorylates the cAMP response element-binding protein (CREB). Phosphorylated CREB binds to cAMP response elements in the promoter regions of specific genes, including the GH1 gene responsible for encoding growth hormone. This transcriptional activation is central to the production of growth hormone within the pituitary gland.
The pulsatile release of GH induced by Tesamorelin stimulates systemic physiological effects, primarily mediated through GH receptors in various tissues, including liver, muscle, and adipose tissue. GH interacts with these receptors to promote lipolysis and inhibit lipogenesis, specifically targeting visceral fat cells. Additionally, GH stimulates the liver to produce insulin-like growth factor 1 (IGF-1), a key mediator of growth hormone’s effects on cell growth and metabolism.
Tesamorelin exhibits a half-life of approximately 20-30 minutes, which is conducive to mimicking the natural pulsatility of GHRH, making it an effective treatment for reducing visceral adipose tissue without significantly impacting subcutaneous fat. This property is particularly valuable in the management of HIV-associated lipodystrophy, where excessive visceral fat accumulation poses health risks.
Unlike other GHRH analogs, Tesamorelin’s efficacy and safety are enhanced by its high receptor specificity, which minimizes the potential for off-target effects commonly associated with broader systemic hormonal alterations. Its unique ability to stimulate GH secretion while maintaining the natural pulsatile release pattern differentiates it from continuous GH or GHRH agonists, which can lead to
It represents a targeted approach to modulating the GH axis, offering significant therapeutic benefits through a carefully engineered peptide structure, precise receptor engagement, and effective induction of key signaling pathways and genetic mechanisms. Its clinical utility in reducing visceral fat while sparing peripheral fat makes it a unique tool in the management of specific metabolic disorders.
Shipping & returns
- Domestic
- 3–4 business days
- Dispatch
- Same day, orders before 2pm ET
- Packing
- Insulated, cold-chain
- Tracking
- Issued on dispatch
- International
- Rates at checkout
On arrival
Inspect the vial before storing it. Check that the lot number on the label matches the lot number on the Certificate of Analysis in your order. If they do not match, do not use the material — contact us and we will replace it.
Returns
We do not accept returns on opened vials. Once material has left our cold chain we cannot verify how it was stored, and we will not resell a vial whose handling history we cannot account for. That restriction is the point of the brand, not an exception to it.
What we do replace
- Material that arrives damaged, compromised, or with a broken seal.
- A lot number that does not match its Certificate of Analysis.
- An analytical result outside the specification stated on the CoA.
- The wrong compound or the wrong quantity.
Report any of the above within 14 days of delivery with photographs and your order number. Verified claims are replaced or refunded in full, including shipping. We do not argue about this.
Unopened vials
Unopened, unrefrigerated-in-transit vials may be returned within 14 days for a refund less shipping, at our discretion and subject to inspection. Returned material is destroyed, not restocked.
Supplied as a raw material for laboratory research and formulation development. Not for human or veterinary use. Not for resale to consumers as supplied.
Compliance & research use
Research use only
Supplied as a raw chemical for laboratory research and formulation development. Not a drug, supplement, cosmetic, food, or medical device. Not evaluated by the FDA.
Not supplied for
- Human or veterinary use.
- Diagnostic, therapeutic, or cosmetic application.
- Resale to consumers as supplied.
Why there are no claims here
You won't find a mechanism of action on this page. That absence is deliberate. We report what we can measure — identity, purity, mass, sequence — and omit everything we cannot. If you ask us for dosage or administration guidance, we will decline.
Who may purchase
Buyers attest at checkout that they are 21 or older, are purchasing for research or formulation use, and accept full responsibility for safe handling and lawful use. Trade names and INNs are used solely to identify the chemical substance.
For laboratory research and formulation development use only. Not for human or veterinary use. Not a drug, cosmetic, or food. Not for resale to consumers as supplied.
Tesamorelin
Values are typical and lot-specific. The figures for your lot are on its Certificate of Analysis. Supplied for laboratory research and formulation development use only.
Tested by a lab that does not work for us
Every lot is analysed by an independent US laboratory before release. Identity, purity and lot authenticity are verified against retention-time and parent-ion mass references. We do not grade our own work.
Representative only. Upload the chromatogram from this lot's certificate to show the real trace.
Results are lot-specific. The certificate above describes the lot you receive, not a representative batch. Retained a minimum of five years and publicly retrievable.
How we know it is what we say it is
Two independent questions have to be answered before a vial leaves the building: is this the right molecule, and how much else is in there. They are answered by different instruments, and both answers ship with the material.
Identity — mass spectrometry. The observed mass is compared against the theoretical mass of the target sequence. A mismatch is a different compound, not a variation.
Purity — reverse-phase HPLC. The main peak is integrated against total peak area. The reported figure is that integration, not a specification we hope to meet.
Lot-matched, not batch-typical. The certificate you receive describes the vial you receive. A representative CoA from a previous lot is not evidence.
Retained and retrievable. Every certificate is QR-resolved and held a minimum of five years, so a result can be produced years after the vial is gone.
Illustrative. The trace for your lot is on its Certificate of Analysis.
From resin to vial
Nothing here is proprietary. It is the standard route, run properly and documented at each step — which is the entire difference between a supplier and a reseller.
Synthesis
Solid-phase peptide synthesis. The sequence is assembled residue by residue on a resin support, then cleaved.
Purification
Preparative reverse-phase HPLC. Truncated and deletion sequences are separated from the target and discarded.
Lyophilization
Freeze-dried to a stable powder cake. No solvent, no carrier, no excipient added.
Lot control
The finished lot is analysed, assigned a number, and tied to its certificate. That number is on the vial you receive.
The paperwork is the product
A buyer sees the website once. They hold the vial every time, and they hold the certificate for years afterwards.
Certificate of Analysis — lot-matched, HPLC purity, identity by mass spectrometry.
Safety Data Sheet — handling, storage and disposal under laboratory conditions.
Identity block — CAS, molecular weight, sequence. A peptide without a CAS and an MW is not a product.
QR-resolved verification — publicly retrievable, retained a minimum of five years.
Supplier traceability — so our paperwork can become part of your safety file.
Keeping it intact
Peptide integrity is lost to heat, light and repeated freeze-thaw long before it is lost to time. Handle accordingly.
Lyophilized, at −20 °C, protected from light. Stable for extended periods in this state.
Performed under laboratory conditions appropriate to the intended research application. Aliquot to avoid repeated freeze-thaw.
Reconstituted material is markedly less stable than lyophilized. Prepare what the work requires.
Dispose of in accordance with local regulations for laboratory chemical waste. See the SDS.
What to ask any supplier
These are the questions a serious buyer asks before the first order. If a supplier cannot answer them in writing, the price is not the relevant variable.
| BioVera Labs | Typical vendor | |
|---|---|---|
| Certificate of Analysis | Lot-matched, per vial | Batch-typical or on request |
| Identity method | Mass spectrometry | Often unstated |
| Purity method | HPLC, integration reported | "≥98%" as a claim |
| CoA retention | 5 years, QR-resolved | Not retained |
| Safety Data Sheet | Ships with every lot | On request |
| Supplier traceability | Documented | Undisclosed |
| Effect claims made | None | Frequent |
Comparison describes documentation practice, not product performance. We make no representation about any other supplier's material.
Literature index
Primary sources, unannotated. We point to the science rather than summarize it into a promise.
Listed for reference only. Inclusion is not a representation about the properties, safety or suitability of this material for any purpose.