Tesamorelin 10mg

Tesamorelin is a sealed vial with 10mg of freeze-dried peptide. It’s a GHRH analog. It’s meant for lab and analytical work only.

Tesamorelin purity and COA

Every Tesamorelin batch we list has a Freedom Diagnostics report behind it. The lab measures purity by HPLC and confirms identity by mass spectrometry, and you can open the full reports in the photo gallery on this page.

• Tesamorelin 10mg: 99.552% purity, reported 2/28/2026, search code ONYX2602270064
• Tesamorelin 10mg: 99.53% purity, reported 8/13/2025, search code onyx2508120018

The highest result on file is 99.552%. Each report carries a search code, so you can look it up on the Freedom Diagnostics website and check that it matches what’s shown here.

Tesamorelin background

Tesamorelin is the full 44-amino-acid growth hormone releasing hormone (GHRH) with a trans-3-hexenoyl group added to the front. That cap protects it from the enzyme DPP-4, so it lasts longer than natural GHRH.

Theratechnologies developed it, and the FDA approved it in 2010 as Egrifta for reducing excess abdominal fat in people with HIV-associated lipodystrophy.

How Tesamorelin works

Tesamorelin binds the GHRH receptor and raises growth hormone and IGF-1. The hexenoyl group on the front end stops DPP-4 from cutting it, which makes it far more stable than natural GHRH.

Its best-documented effect is on visceral fat, the fat around the organs, which is what the Egrifta approval was based on.

Tesamorelin specifications

• Compound: Tesamorelin
• CAS number: 218949-48-5
• Molecular formula: C221H366N72O67S
• Molecular weight: 5,135.9 g/mol
• Structure: 44 amino acids with a trans-3-hexenoyl group
• Amount per vial: 10mg
• Form: lyophilized (freeze-dried) powder in a crimp-sealed glass vial
• SKU: ONYX-TESA-10
• Use: laboratory research only

Published studies

Falutz and colleagues reported in the New England Journal of Medicine in 2007 that 26 weeks of tesamorelin cut visceral fat by about 15% compared with placebo, while raising IGF-1.

Later studies looked at liver fat in people with HIV, where the peptide reduced liver fat and slowed fibrosis progression in a trial published in The Lancet HIV in 2019.

You can read the original papers through this PubMed search for Tesamorelin, a free database from the U.S. National Library of Medicine.

How Tesamorelin compares

In one line, the peptide is a stabilized GHRH analog with trial data on visceral fat. The closest alternatives work differently:

• Sermorelin is the first 29 amino acids of GHRH, the shortest fully active piece
• Ipamorelin is a selective ghrelin receptor agonist that releases growth hormone in pulses
• CJC-1295 No DAC is a GHRH analog with four substitutions that slow its breakdown
• IGF-1 LR3 is a longer-lasting IGF-1 analog that binding proteins mostly ignore

GHRH analogs and ghrelin receptor agonists hit the pituitary through two separate receptors, and IGF-1 LR3 acts further down the same axis. Every one of them is in stock in our growth hormone peptides.

What to check on delivery

Each vial carries the black and white Onyx Research label with the compound, the amount, 99% purity and the research-use line. Check that the name and amount match your order and that the cap and crimp are tight.

The powder should look dry and pale, either as a solid cake or loose granules. If the cake has crumbled in the box, that’s expected. Powder that looks wet, gummy or off-color is not, so keep that vial out of use and send us a photo.

Log the date the vial arrived and, later, when and how you mixed it. It’s quick, and it saves a lot of guesswork if something goes wrong.

Reconstitution chart and steps

Pick your water volume first and the strength follows from it. With the 10mg vial:

• Add 1mL: 10mg/mL (1,000mcg per 0.1mL, or 10 units on a U-100 syringe)
• Add 2mL: 5mg/mL (500mcg per 0.1mL, or 10 units on a U-100 syringe)
• Add 3mL: 3.33mg/mL (333.3mcg per 0.1mL, or 10 units on a U-100 syringe)

Use bacteriostatic water, added slowly down the inside of the vial. Swirl, don’t shake. If some powder sticks to the glass, rest the vial in the fridge for a few minutes and swirl again.

Storing Tesamorelin

Two rules cover the peptide storage: powder in the freezer, solution in the fridge. Keep both away from light and damp, since those break freeze-dried peptides down fastest.

Store mixed vials upright, so the liquid stays off the rubber stopper.

Often bought with it

• CJC-1295 DAC 5mg, a long-acting GHRH analog
• CJC-1295 No DAC 5mg, a GHRH analog
• Ipamorelin 10mg, a GH secretagogue
• MK-677 Capsules 12.5mg (60 Count), pre-measured solid doses
• CJC-1295 No DAC and Ipamorelin Blend 10mg: CJC-1295 No DAC and Ipamorelin in one vial

See everything in our growth hormone peptides and weight loss peptides, or start from the Onyx Research home page to browse every category.

Questions people ask

How much is in a Tesamorelin vial?

10mg, as printed on the label.

Is it in stock?

Yes, the peptide is in stock today.

Is there a crypto discount?

Yes. Onyx Research gives an extra discount on orders paid with crypto, applied at checkout.

Do you charge for shipping?

Shipping is free on all orders, wherever you are.

How does ordering work?

Choose the size, press add to cart and go through checkout. You can add bacteriostatic water and anything else to the same order.

Buy Tesamorelin from Onyx Research

Add the peptide to your cart for $95.00. It’s in stock, and Onyx Research ships it free to the US, Canada, Europe, Australia and beyond.

Crypto payments get an extra discount, applied at checkout.

Building a larger order? See what else is in our growth hormone peptides and weight loss peptides.

Research use only. Onyx Research supplies this material to qualified labs for in-vitro work. It’s not a medicine, supplement, food or cosmetic, and it must not be given to people or animals. No statement here has been reviewed by the FDA.