About Tesamorelin
Tesamorelin is a synthetic 44-amino-acid analog of growth hormone-releasing hormone (GHRH), with a trans-3-hexenoyl group added at the N-terminus. Biogenesis Labs supplies tesamorelin as lyophilized powder in 20 mg vials, for laboratory research use only.
Research-grade vials: Tesamorelin 20 mg. Every batch is independently tested — see the Certificates of Analysis.
How to calculate Tesamorelin concentration
concentration (mg/mL) = tesamorelin in vial (mg) ÷ diluent volume (mL)
- A 20 mg Tesamorelin vial with 2 mL of bacteriostatic water is 10.00 mg/mL (10,000 mcg/mL).
- On a U-100 syringe, 100 units = 1 mL, so each unit holds 100.0 mcg.
- Use 3 mL instead and the same vial reads 6.67 mg/mL, or 66.7 mcg per unit. More diluent lowers the concentration; the tesamorelin in the vial does not change.
For U-40 syringes (40 units = 1 mL), divide mcg/mL by 40 instead of 100. The calculator above switches between both scales.
Tesamorelin reconstitution chart
Concentration for each Biogenesis Labs vial size across common diluent volumes. “In 10 units” is the tesamorelin contained in 10 units on a U-100 syringe (0.10 mL).
Tesamorelin 20 mg vial
| Diluent | Concentration | mcg / mL | Per U-100 unit | In 10 units | U-100 units per 1 mg |
|---|---|---|---|---|---|
| 1 mL | 20.00 mg/mL | 20,000 | 200.0 mcg | 2.00 mg | 5.00 |
| 1.5 mL | 13.33 mg/mL | 13,333 | 133.3 mcg | 1.33 mg | 7.50 |
| 2 mL | 10.00 mg/mL | 10,000 | 100.0 mcg | 1.00 mg | 10.00 |
| 2.5 mL | 8.00 mg/mL | 8,000 | 80.0 mcg | 0.80 mg | 12.50 |
| 3 mL | 6.67 mg/mL | 6,667 | 66.7 mcg | 0.67 mg | 15.00 |
| 4 mL | 5.00 mg/mL | 5,000 | 50.0 mcg | 0.50 mg | 20.00 |
| 5 mL | 4.00 mg/mL | 4,000 | 40.0 mcg | 0.40 mg | 25.00 |
Values are rounded. Figures describe solution concentration only and are not recommendations.
Reconstituting and storing a Tesamorelin vial
Let the sealed vial reach room temperature, swab both stoppers, and run the diluent slowly down the inside wall of the vial rather than onto the powder. Swirl gently until dissolved — don't shake — and label the vial with the concentration and date. Reconstituted solutions are commonly kept refrigerated at 2–8 °C and protected from light. The full step-by-step guide, syringe-scale explainer and BAC vs. sterile water comparison are on the main Peptide Calculator page.
Tesamorelin calculator FAQ
What concentration does a 20 mg Tesamorelin vial with 3 mL of bacteriostatic water give?
6.67 mg/mL (6,667 mcg/mL). On a U-100 syringe that is 66.7 mcg per unit, and 10 units hold 0.67 mg.
What concentration does a 20 mg Tesamorelin vial with 2 mL give?
10.00 mg/mL, or 100.0 mcg per unit on a U-100 syringe.
How many U-100 units contain 1 mg of Tesamorelin?
It depends on the concentration: units per mg = 100 ÷ concentration in mg/mL. At 6.67 mg/mL (20 mg in 3 mL) 1 mg is in 15.00 units; at 10.00 mg/mL (20 mg in 2 mL) it is in 10.00 units.
How much bacteriostatic water should be added to a Tesamorelin vial?
There is no single correct volume. The volume comes from your own research protocol; the calculator and chart show the concentration each volume produces. Only add a volume your vial can hold.
Is this a tesamorelin dosage calculator?
It handles the unit math people look for under that name: vial mg and diluent volume in, mg/mL and syringe units out. It does not suggest how much to use; that comes from your own research protocol.
Does this Tesamorelin calculator provide dosing guidance?
No. It performs concentration and unit-conversion math only. All Biogenesis Labs products are supplied for laboratory research use only and are not for human consumption.
