Retatrutide Dosage Calculator
Reconstitution volumes, concentration and U-100 unit equivalents for Retatrutide.
These examples explain unit relationships in published research and are not instructions for preparing, measuring or administering any compound. Do not use this information to self-administer research chemicals.
Worked at 2.00 mg, the amount reported in the research for Retatrutide. Every row is the same arithmetic: milligrams in the vial divided by millilitres of water gives the concentration, and the target amount divided by that concentration gives the volume.
5 mg vial of Retatrutide
| Water added | Concentration | Volume for 2.00 mg | Units (U-100) |
|---|---|---|---|
| 1.0 mL | 5.00 mg/mL | 0.40 mL | 40 u |
| 2.0 mL | 2.50 mg/mL | 0.80 mL | 80 u |
| 3.0 mL | 1.67 mg/mL | 1.20 mL | 120 u |
10 mg vial of Retatrutide
| Water added | Concentration | Volume for 2.00 mg | Units (U-100) |
|---|---|---|---|
| 1.0 mL | 10.00 mg/mL | 0.20 mL | 20 u |
| 2.0 mL | 5.00 mg/mL | 0.40 mL | 40 u |
| 3.0 mL | 3.33 mg/mL | 0.60 mL | 60 u |
15 mg vial of Retatrutide
| Water added | Concentration | Volume for 2.00 mg | Units (U-100) |
|---|---|---|---|
| 1.0 mL | 15.00 mg/mL | 0.13 mL | 13 u |
| 2.0 mL | 7.50 mg/mL | 0.27 mL | 27 u |
| 3.0 mL | 5.00 mg/mL | 0.40 mL | 40 u |
20 mg vial of Retatrutide
| Water added | Concentration | Volume for 2.00 mg | Units (U-100) |
|---|---|---|---|
| 1.0 mL | 20.00 mg/mL | 0.10 mL | 10 u |
| 2.0 mL | 10.00 mg/mL | 0.20 mL | 20 u |
| 3.0 mL | 6.67 mg/mL | 0.30 mL | 30 u |
30 mg vial of Retatrutide
| Water added | Concentration | Volume for 2.00 mg | Units (U-100) |
|---|---|---|---|
| 2.0 mL | 15.00 mg/mL | 0.13 mL | 13 u |
| 3.0 mL | 10.00 mg/mL | 0.20 mL | 20 u |
| 5.0 mL | 6.00 mg/mL | 0.33 mL | 33 u |
Goal of the protocol. Drive meaningful fat loss and metabolic gains by engaging three incretin and glucagon pathways at once.
Once weekly, subcutaneous. For research reference only, not medical advice.
| Phase | Amount |
|---|---|
| Weeks 1–4 | 2 mg (2,000 mcg) |
| Weeks 5–8 | 4 mg |
| Weeks 9–12 | 8 mg |
| Weeks 13+ | 12 mg |
Mirrors the phase-2 trial escalation; steps rise every four weeks so the gut can adjust. The amount is titrated to the response, so the top step is not always needed, and 12 mg is a high maintenance level.
Higher amounts, more injections. As the weekly total climbs, it is commonly divided into two or more injections across the week, which keeps each shot small and easier to tolerate.
What a course of Retatrutide actually costs, worked from list price and the amount in the schedule above, plus the whole vials a 12-week run would take.
| Supplier | Vial | Price | Per mg | Per dose | 12 weeks | Independent test |
|---|---|---|---|---|---|---|
| Quartz Peptides | 10 mg | $99 | $9.90 | $119 | $594 (6 vials) | None on file |
One supplier listed so far for this compound.
List prices, checked September 4, 2026. Sale pricing is ignored on purpose so the table does not swing week to week. Verify before ordering.
Suppliers are listed alphabetically. We do not rank them by price, because the cheapest vial and the one worth buying are rarely the same thing. The column that matters is the last one, and today most of it reads "none on file", including for Quartz Peptides, which is owned by this site’s editor. See the disclosure and the COA guide.
How strong is the evidence for Retatrutide?
We grade it B on a four-point scale. Phase 2 results published and phase 3 programs are still running. Not approved.
What is the half-life of Retatrutide?
About 6 days. That is the figure the reported dosing frequency follows from.
What amount of Retatrutide is used in the research?
Weeks 1–4: 2 mg (2,000 mcg). Weeks 5–8: 4 mg. Weeks 9–12: 8 mg. Weeks 13+: 12 mg. Mirrors the phase-2 trial escalation; steps rise every four weeks so the gut can adjust. The amount is titrated to the response, so the top step is not always needed, and 12 mg is a high maintenance level.
How much does Retatrutide cost?
A 10 mg vial lists at $99 from Quartz Peptides, which works out to $9.90 per mg and about $119 per dose at the amount used in research. Prices checked September 4, 2026. Price is not a quality signal, so check the certificate of analysis before ordering from anyone.
How is Retatrutide stored once reconstituted?
Refrigerate the mixed vial at 2 to 8 °C, use within a few weeks and avoid freeze and thaw.
Mechanism, benefits and side effects in the research, evidence grade, storage, third-party testing and the reference studies behind these amounts.
Open the Retatrutide reference →