Tesamorelin
Tesamorelin is a synthetic GHRH analogue of 44 amino acids synthesised with a trans-3-hexenoic acid modification, studied in visceral-adipose research for its role in pulsing pituitary GH and elevating IGF-1.
A GHRH analogue studied for visceral fat reduction and body-composition support — used in clinician-supervised metabolic and growth hormone contexts.
For Research Use Only — Not for Human Consumption.
This compound has EMA approval as a prescription therapeutic.
Sold for in vitro laboratory research only.
Therapeutic use requires a licensed prescriber.
Listed under the WADA 2026 Prohibited List.
Not for use by competitive athletes in sanctioned sports.
- Availability
- Delivered in 3–7 days (EU)
- Storage
- Store 2–8 °C. Use reconstituted vial within 24 hours.
- Ships from
- European fulfilment centre, tracked express
Lab proof, by batch
- Tested independently, by batch
- Certificate of analysis available
- Purity and identity on record
Pituitary Growth Hormone Research.
Tesamorelin (CAS 218949-48-5) is a synthetic analogue of GHRH conjugated with trans-3-hexenoic acid for improved metabolic stability. Research has examined its effects on GH pulse amplitude, IGF-1 elevation, and visceral adipose reduction. Formula C221H366N72O67S, MW 5135.89 g/mol.
- — Falutz et al. — GHRH analogue effects on visceral adipose tissue in clinical trials
- — Grunfeld et al. — Tesamorelin and lipodystrophy endpoints in HIV-associated disease
Research context only. Not medical advice. Consult a qualified clinician before use.
- 5 mg lyophilised powder per vial
- Reconstitute with bacteriostatic water before use
- Store lyophilised at 2–8 °C, protect from light
- Once reconstituted, use within 24 hours
- One 5 mg lyophilised Tesamorelin vial
- Tamper-evident cap with batch-coded label
- Storage card with clinician-consultation note
What the research reports about this molecule.
Classic parameters from peer-reviewed literature. Not human dosing guidance — read alongside the PubMed references on /learn.
- Sequence
- 44-amino-acid GHRH analogue
- Molecular weight
- 5135 Da
- Mechanism
- Pulses pituitary GH
- Research domain
- Visceral-adipose research
- Reconstitution
- Bacteriostatic water, USP
- Storage
- Long-term -20°C lyophilised; -80°C for >12 months; reconstituted 2-8°C, ≤4 weeks
Simple, deliberate steps — not a protocol.
These are practical handling notes. Dosing decisions stay between you and your clinician.
- 1
Reconstitute with 1 mL bacteriostatic water immediately before use — use within 24 hours
- 2
Administer subcutaneously as directed by your clinician
- 3
Do not store reconstituted vial; prepare fresh each time
How-to-use guide
Read the research protocol
Concise reconstitution, dosing, and handling instructions.
Reconstitution calculator
Research calcEnter the vial amount, bacteriostatic water, and target research dose to see concentration and insulin-syringe draw.
| Syringe | Per unit | Units to draw |
|---|---|---|
| U-100 (1 mL = 100u) | 25 mcg | 10 units |
| U-50 (1 mL = 50u) | 50 mcg | 5 units |
| U-40 (1 mL = 40u) | 62.5 mcg | 4 units |
For laboratory research calculation only. Not medical or dosing advice, and not for human consumption.
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Each release is matched with quality documentation through a documented verification path. Identity, purity, and composition test results sit on the product page before you buy.
Every batch is verified by an ISO/IEC 17025-accredited laboratory before release. Identity, purity, and documentation travel with the product — not behind a form.
Sensitive peptides ship in insulated cold packaging with gel packs sized for a 48-hour transit window, tracked door to door.
Everything worth asking before you order.
Shipping, storage, quality, and when to speak to a clinician — without the runaround.
What proof of quality comes with my order?
Every batch ships with a batch code printed on the vial. The matching independent lab report — showing identity, purity, and composition — is linked on the product page and stays on your order page after purchase.
Should I speak to a clinician before using a peptide?
We recommend it — especially if you are pregnant, nursing, managing a medical condition, or combining peptides with prescribed medication. Our product pages are educational. They are not medical advice and they do not replace a conversation with a qualified practitioner.
When will my order ship and arrive?
Orders placed before 14:00 CET Monday–Friday ship the same business day from our European fulfilment centre in The Hague, Netherlands. Standard tracked EU delivery arrives in 2–4 business days; express options are available at checkout.
What does "research only" actually mean on a peptide label?
Research-only means the compound has not been approved by the EMA or any national medicines authority for medical use, and is sold solely for in-vitro and laboratory research. It is not a supplement, a cosmetic, or a medicine, and it carries no claims for human consumption.
What's the difference between a prescription peptide and a research peptide?
A prescription peptide (e.g. Wegovy, Mounjaro, Vyleesi, Zadaxin in the relevant jurisdictions) has been through EMA or national-authority review, carries an authorised indication, and is dispensed by a pharmacy against a script. A research peptide is a reference-grade compound sold for laboratory use only.
How do I reconstitute a lyophilised peptide vial?
Bring both the lyophilised vial and the bacteriostatic water to room temperature, equalise pressure with a sterile vented needle, then inject the solvent slowly down the side of the vial. Swirl gently — never shake — until clear, and refrigerate at 2–8 °C.
How much bacteriostatic water should I add to my peptide vial?
The calculation is peptide mass (mg) ÷ desired concentration (mg/mL) = volume of bacteriostatic water in mL. For example, a 5 mg vial at 1 mg/mL needs 5 mL; at 2 mg/mL, 2.5 mL. Every Peptyds product page carries a suggested reconstitution volume tuned to the vial size.
How long does a reconstituted peptide stay stable in the fridge?
Most lyophilised peptides reconstituted with bacteriostatic water remain stable for 28–30 days at 2–8 °C, protected from light. A handful of short, fragile sequences — Epithalon among them — drop to roughly 14 days. Never freeze a reconstituted vial.
What side effects are most commonly reported across peptide research?
Across published trials and case series, the most frequent reported events are injection-site reactions (redness, induration, transient discomfort), headache, mild nausea, and temporary fatigue. GLP-1 and dual-agonist class peptides add dose-dependent gastrointestinal effects.
Who should not use peptides?
Peptides are not appropriate for anyone who is pregnant, nursing, planning conception, under 18, managing active cancer, or on immunosuppressants — and competitive athletes governed by WADA must avoid every peptide on the prohibited list. Anyone with a personal or family history of melanoma should specifically avoid melanocortin-receptor agonists.