Retatrutide
Weight loss and metabolic
2 mg to 12 mgonce weekly, from the Phase 2 and 3 trials
Open the chart for your vial
Easy to follow peptide dosages
Dosage charts for each peptide and vial size, mixing steps, and a dosage calculator. Each page shows the concentration, the volume and the U-100 syringe units together, with the source beside every number.
Covers 49 peptides and blends. Each page lists the legal status in the US and in Canada.
30 mg vial+ 3 mL water10 mg/mL
| Dose | Draw up | Syringe |
|---|---|---|
| 2.5 mg | 0.25 mL | 25 units |
| 5 mg | 0.50 mL | 50 units |
| 7.5 mg | 0.75 mL | 75 units |
| 10 mg | 1.00 mL | 100 units |
Once weekly. Schedule from the FDA label.
5 mg vial+ 2 mL water2.5 mg/mL
| Dose | Draw up | Syringe |
|---|---|---|
| 0.25 mg | 0.10 mL | 10 units |
| 0.5 mg | 0.20 mL | 20 units |
| 1 mg | 0.40 mL | 40 units |
| 1.7 mg | 0.68 mL | 68 units |
| 2.4 mg | 0.96 mL | 96 units |
Once weekly. Schedule from the FDA label.
30 mg vial+ 3 mL water10 mg/mL
| Dose | Draw up | Syringe |
|---|---|---|
| 2 mg | 0.20 mL | 20 units |
| 4 mg | 0.40 mL | 40 units |
| 8 mg | 0.80 mL | 80 units |
| 9 mg | 0.90 mL | 90 units |
| 12 mg | 1.20 mL | 120 unitsMore than a 1 mL syringe holds. |
Once weekly. Doses from the Phase 2 and Phase 3 trials (NEJM 2023, 2026).
What DosageFacts is
DosageFacts is a reference for peptide dosing. Each page takes one peptide and one vial size and shows the mix, the concentration and the dose in milligrams, millilitres and syringe units.
Every number has its source next to it. Each source is opened and matched to the number before a page goes live, and each page shows the status in the US and in Canada.
- Dose, mL and units on one row
- The source beside every number
- US and Canada status on every page
Featured peptide dosages
Pick a peptide and a vial size to open its dosage chart.
Tirzepatide
Weight loss and metabolic
2.5 mg to 15 mgonce weekly, from the FDA label
Open the chart for your vial
Semaglutide
Weight loss and metabolic
0.25 mg to 2.4 mgonce weekly, from the FDA label
Open the chart for your vial
Look up a dosage
Pick a peptide and a vial size. The mix, the dose table and the syringe change together.
- Every peptide in one list
- Dose, mL and units together
- Syringe drawn to the mark
Tirzepatide
Vial size
- Vial
- 30 mg peptide in the vial
- Water added
- 3 mL bacteriostatic water
- Concentration
- 10 mg/mL 30 mg / 3 mL
- 1 unit equals
- 0.1 mg 1 unit is 0.01 mL
| When | Dose | Volume | Syringe units |
|---|---|---|---|
| 2.5 mg | 0.25 mL | 25 units | |
| 5 mg | 0.50 mL | 50 units | |
| 7.5 mg | 0.75 mL | 75 units | |
| 10 mg | 1.00 mL | 100 units |
SourceSchedule from the FDA label (earliest step-up allowed). Vial math is arithmetic.
Draw to 25 units. That is 0.25 mL, which holds 2.5 mg.The stopper edge sits halfway between the 24 and 26 lines.
U-100 insulin syringe, 1 mL. Each small line is 2 units.
How to read a peptide dosage chart
Four checks, in order. The numbers match the small marks on the chart above.
Match the peptide and the vial size
Start with the exact peptide and the strength printed on your vial. A 5 mg vial and a 10 mg vial give different draws from the same amount of water.
Check the mix
The milligrams in the vial divided by the millilitres of water gives the concentration. Everything else is worked out from that.
Read dose, mL and units on one row
Milligrams and micrograms measure the peptide. Millilitres and units measure the liquid. On a U-100 syringe, 10 units is 0.10 mL.
Check where the number comes from
Each chart says if a schedule comes from a drug label, a published trial or common use, and how often it is taken.
Tools
Six ways to check your numbers before you draw.
-
Dosage calculator
Enter your vial and your water. Get the draw in units.
Open the calculator -
Dosage chart
Every peptide and vial size in one table you can search and sort.
Open the chart -
Mixing step-through
Walk through mixing a vial, one step at a time.
Start the steps -
Syringe reader
Drag the plunger and see units, mL and dose line up.
Try the syringe -
HCG calculator
hCG doubling time from two blood tests, and the draw for an HCG vial.
Open the HCG calculator -
IU vial calculator
For vials labelled in IU, such as HGH, HCG and HMG.
Open the IU calculator
Peptide dosage calculator
Type in what is printed on your vial, the water you added and the dose you are checking. The answer updates as you type.
4Read the draw in mL and syringe units.
Draw to 5 units
- Concentration
- 5 mg/mL
- Volume
- 0.05 mL
- Doses per vial
- 40
100 unit syringe, 1 mL. Each small line is 2 units.
- Concentration10 mg / 2 mL = 5 mg/mL
- Volume0.25 mg / 5 mg/mL = 0.05 mL
- Syringe units0.05 mL x 100 = 5 units
- Doses per vial10 mg / 0.25 mg = 40
How our dosage pages are built
Every dosage page follows the same build, so you always know where to look and what each number rests on.
- 1Mixing steps and concentration for each vial
- 2Dose, frequency, mL and units on one row
- 3A source beside every number
- 4Label, trial and common-use ranges kept apart
- 5Sources checked by hand, with a dated change log
Each page shows the date it was last checked.
Essential guides
Start here if this is your first vial. Take the first-time tutorial
- Beginner's guideWhat the words mean and what to have ready before your first vial.
- How to mix a peptide vialAdding the water and working out the concentration, step by step.
- How to read an insulin syringeUnits, lines and where the stopper edge should sit.
More: Units, mL and mg explained How to store peptides Glossary All guides
Browse by goal
The same list, grouped by goal. Blends have their own group. See every goal
From the blog
The six most recent posts.
Peptide dosage questions
Short answers to what people ask first.
On a U-100 syringe, 100 units is 1 mL, so 1 unit is 0.01 mL. Units measure volume, not dose. How much peptide is in a unit depends on how much water you added.
Divide the milligrams in the vial by the millilitres of water you added. A 10 mg vial mixed with 2 mL gives 5 mg per mL.
No. Vial size changes how many doses you get and how the math works out. It does not change what dose is right.
Approved drugs use the official label. Others use published trials where they exist. Where neither exists we say so and label the range as commonly reported.
Yes. Each page shows the status in the US and in Canada, with the date it was checked.
No. DosageFacts is a reference. Talk to a licensed professional before using any medication.