Key takeaways
- The sum is volume = amount ÷ concentration, then × 100 for U-100 units.
- With no approved label, nothing on this page can tell you whether an amount is sensible.
- Be sure of your source and the written concentration before any number goes into a calculator.
- Reko shows a plain regulatory status for each compound it lists.
What this tool does
This tool converts an amount in milligrams and a concentration into millilitres and syringe units. It is the same arithmetic as for any vial. It says nothing about what an amount should be.
At the time of writing, retatrutide is not an approved medicine. There is no prescribing information to check your numbers against. [verify current regulatory status in the US and EU]
How the arithmetic works
- Volume (mL) = amount (mg) ÷ concentration (mg/mL).
- Syringe units (U-100) = volume × 100.
If the concentration is written as an amount in a volume, such as 10 mg in 2 mL, divide first: 10 ÷ 2 = 5 mg/mL.
A worked example
Example. These numbers are made up to show the steps. They are not a label value and not a suggestion.
A made-up amount of 2 mg from a mix of 5 mg/mL.
- 2 ÷ 5 = 0.4 mL.
- 0.4 × 100 = 40 units.
What to check against your label
- Where the product came from, and what the container says about its contents and strength.
- The concentration, written down when it was mixed.
- Any guidance from a clinician who knows you. [verify: no approved labelling exists; add current status]
Frequently asked questions
Is there a label I can check?
Not for an unapproved compound. [verify current status]
Why is the status shown in Reko?
Because knowing whether a regulator has approved something is part of understanding what you are recording.
Does the tool give a dose?
No.
How Reko does this in the app
Reko lets you track a compound with its own unit and shows a plain regulatory status next to it. Its estimated level uses published absorption and elimination half-lives and is an estimate, not a blood test. [confirm retatrutide is in Reko's compound list before publishing]
Reko records what you and your prescriber decide. It never suggests a dose, and this page is not medical advice.