Reconstitution calculator
Retatrutide reconstitution calculator
A 10 mg Retatrutide vial with 2 ml of bacteriostatic water holds 5,000 mcg per ml - so 1,000 mcg, as pure arithmetic, is a 20-unit draw on a U-100 insulin syringe. Change any of those numbers and the answer moves; the calculator below does the moving for you, and further down is the thing the vendor calculators never mention: where Retatrutide actually stands with regulators right now.
Retatrutide reconstitution calculator
Math on the numbers you enter - nothing more. Peptlas sells nothing and suggests no amounts.
Concentration
— mcg/ml
Draw volume
— ml
On a U-100 insulin syringe
— units
Draw to — on the 100-unit scale
Enter your intended dose above and the draw appears here, with the math shown.
Results are arithmetic, not advice. Peptlas is a regulatory-status reference: it does not recommend amounts, schedules, or use of any compound. Read the full disclaimer.
What you are working with
Retatrutide has no approved commercial form anywhere - Eli Lilly's trial product is not sold, and nothing on the market is a pharmaceutical product. What gray-market sellers offer is lyophilized powder in vials, commonly labeled 5 mg, 10 mg, or 15 mg, produced outside any quality system - the FDA has warned sellers, including some using coded product names.
The reference table below shows the concentration each common vial-and-water combination produces. These are arithmetic facts about Retatrutide vial sizes, not guidance about amounts - the same table exists for BPC-157 and TB-500 (Thymosin Beta-4), with different numbers.
| Vial | + 1 ml water | + 2 ml water |
|---|---|---|
| 5 mg | 5,000 mcg/ml | 2,500 mcg/ml |
| 10 mg | 10,000 mcg/ml | 5,000 mcg/ml |
| 15 mg | 15,000 mcg/ml | 7,500 mcg/ml |
While you are here - where Retatrutide stands
RestrictedRetatrutide is an investigational drug - Eli Lilly's GIP/GLP-1/glucagon triple agonist - with no approved form anywhere in the world. Five Phase 3 TRIUMPH trials have read out positively and Lilly has said it plans to submit a Biologics License Application to the FDA in the first quarter of 2027, but until approval there is no legal commercial product. Compounding is not an option either: retatrutide is not a component of any approved drug, has never been on the FDA shortage list, and is not an eligible bulk substance - so the pathways that briefly permitted compounded semaglutide and tirzepatide never applied to it.
Retatrutide math, asked and answered
- How much bacteriostatic water do you add to a 10 mg Retatrutide vial?
- Any amount - water sets the concentration, not the contents. With 2 ml, a 10 mg vial gives 5,000 mcg/ml; with 1 ml it gives 10,000 mcg/ml. More water means the same dose is a larger, easier-to-read draw on the syringe. There is no single correct volume, which is why this page calculates instead of prescribing.
- How many insulin-syringe units is 1,000 mcg of Retatrutide?
- It depends entirely on how the vial was reconstituted. As arithmetic: in a 10 mg vial with 2 ml of water (5,000 mcg/ml), 1,000 mcg is 20 units on a U-100 syringe. With 1 ml of water instead, the same 1,000 mcg is 10 units. The calculator above does this for your actual numbers.
- Is Retatrutide legal right now?
- Restricted - Retatrutide is an investigational drug - Eli Lilly's GIP/GLP-1/glucagon triple agonist - with no approved form anywhere in the world. Five Phase 3 TRIUMPH trials have read out positively and Lilly has said it plans to submit a Biologics License Application to the FDA in the first quarter of 2027, but until approval there is no legal commercial product. The full, source-linked answer is on the Retatrutide status page, verified Aug 22, 2026 (ET).
- What form does Retatrutide come in?
- Retatrutide has no approved commercial form anywhere - Eli Lilly's trial product is not sold, and nothing on the market is a pharmaceutical product. What gray-market sellers offer is lyophilized powder in vials, commonly labeled 5 mg, 10 mg, or 15 mg, produced outside any quality system - the FDA has warned sellers, including some using coded product names.
Other calculators and the atlas
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