How many units / retatrutide / not FDA-approved
How Many Units Is 12 mg of Retatrutide?
12 mg is a dose used in clinical trials of retatrutide. The math is: divide 12 mg by a strength in mg per mL, then multiply by 100 to get units on a U-100 insulin syringe. At a made-up strength of 5 or 10 mg/mL, the result would be more than a 1 mL syringe holds. At 20 mg/mL it’s 60 units. These are made-up examples, not instructions for any vial. The published TRIUMPH studies used 12 mg as a target dose, reached by stepping up over time. But retatrutide is still being studied and has no approved product strength. A page that shows units can’t prove that a research product is legal, sterile (germ-free), effective or available. Every number here is for learning about the trials and the math. None of it is a prescription.
Last updated
| Strength (mg per mL) | Liquid | Units on a U-100 insulin syringe | On a 1 mL syringe |
|---|---|---|---|
| 5 mg/mL | 2.4 mL | 240 | more than a 1 mL syringe holds |
| 10 mg/mL | 1.2 mL | 120 | more than a 1 mL syringe holds |
| 20 mg/mL | 0.6 mL | 60 | right on a line |
A U-40 or other syringe would give a different draw for this 12 mg Retatrutide example.
This page answers the 12 mg Retatrutide example; use the strength printed on your label.
Your numbers
Syringe size and line spacing
The syringe's barrel or packaging says 0.3 mL, 0.5 mL or 1 mL (or 30, 50 or 100 units).
Where 12 mg fits in the trials
In the TRIUMPH trials, study groups aiming for 12 mg stepped up every 4 weeks: 2, 4, 6, 9, then 12 mg. Some TRIUMPH groups continued beyond 9 mg to 12 mg. The study dose is different from a labeled medicine strength. This is background from published trials, not an approved schedule.
Brand-name products
No brand-name product gives this amount. For retatrutide, that’s expected. It is still being studied, is not FDA-approved, and has no approved product.
Questions about 12 mg
Is 12 mg an approved retatrutide dose?
No. This page uses 12 mg, a dose from published clinical trials, only as an example for U-100 insulin syringe math. It is not part of any approved schedule.
How many units is 12 mg at the example strength?
At 20 mg/mL, 12 mg is 60 units on a U-100 insulin syringe. Whether that can be read exactly depends on the lines printed on the syringe.
Related guides
The basics behind this answer, then the calculator for your own vial.
Sources
The medical and device facts on this page come from these sources. Each entry shows the date we accessed it.
- 01 Retatrutide in the TRIUMPH-1 obesity trial · Eli Lilly and Company, 05/21/2026. Accessed 2026-09-28.
- 02 Retatrutide in the TRIUMPH-2 and TRIUMPH-3 trials · Eli Lilly and Company, 07/23/2026. Accessed 2026-09-28.
- 03 Retatrutide in the TRIUMPH-4 knee osteoarthritis trial · Eli Lilly and Company, 12/11/2025. Accessed 2026-09-28.
- 04 FDA's concerns with unapproved GLP-1 drugs used for weight loss · U.S. Food and Drug Administration, 10/01/2026. Accessed 2026-10-01.
- 05 Technical Data Sheet – Insulin Syringes · embecta, Rev B, 12/2025. Accessed 2026-09-28.
- 06 Injection technique guide · embecta, ©2025, EMB-05148. Accessed 2026-09-28.
- 07 Getting Started booklet · embecta, ©2023. Accessed 2026-09-28.
- 08 SafetyGlide Insulin Syringes quick reference guide · embecta. Accessed 2026-09-28.
- 09 ISO 8537:2016, sterile single-use insulin syringes · International Organization for Standardization, 2016. Accessed 2026-09-28.
Medically reviewed by Ashley Alexis, NDLast reviewed How we review