This page covers one specific question: how much bacteriostatic water to add to a 10 mg vial of tesamorelin, and what concentration each choice gives. For any other vial size, use the Peptide Reconstitution Calculator.
Concentration by water volume
| Water added | Concentration | Peptide in 0.1 mL (10 units) |
|---|---|---|
| 1 mL | 10 mg/mL (10,000 mcg/mL) | 1,000 mcg |
| 2 mL | 5 mg/mL (5,000 mcg/mL) | 500 mcg |
| 3 mL | 3.33 mg/mL (3,333 mcg/mL) | 333 mcg |
A U-100 syringe reads 100 units per mL on every barrel size, so 10 units is always 0.1 mL. More water gives a lower concentration and finer resolution per graduation; less water keeps the working volume small. One 3 mL vial of bacteriostatic water covers every option above.
About the compound
Tesamorelin is a 44-amino-acid synthetic analogue of growth hormone-releasing hormone (GHRH), stabilised by a trans-3-hexenoyl group on the N-terminal tyrosine. It is a comparatively large peptide, which matters in two practical ways: it is more sensitive to mechanical stress during reconstitution than short peptides, and a greater share of the lyophilised solid is counter-ion and bound water rather than peptide. The second point is explained in HPLC purity versus net peptide content.
Handling notes specific to tesamorelin
- Let the vial reach room temperature before piercing the stopper, to avoid drawing moisture onto the cake.
- Run the water slowly down the inside wall of the vial. Do not jet it onto the powder.
- Swirl or roll gently until clear. Longer peptides foam and shear if shaken, so patience here matters more than it does with short sequences.
- Once reconstituted, store at 4 °C, protect from light and avoid refreezing.
- Label the vial with the date and the concentration you chose from the table above.
Supply
Tesamorelin 10mg is supplied as a lyophilised powder with CAS number, molecular formula and storage conditions on the product page. Dispatched same day from the UK on orders placed before 4pm, Monday to Friday.
Concentrations assume the vial contains the full labelled mass of peptide; see your Certificate of Analysis for net peptide content. Supplied for in vitro laboratory research use only. Not for human or veterinary use. Nothing on this page is dosing or medical advice.