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Reconstitution · Thymosin alpha-1
Pick the vial, the water you added and the dose. Get the exact draw in units for the syringe in your hand.
Step 1 of 4
This vial holds 10 mg in total.
U-100 insulin syringe · 1 mL · lines every 2 units · 1 unit = 0.01 mL
32.0 units on a U-100 insulin syringe · 1 mL · lines every 2 units, which is 0.32 milliliters. The draw lands on a syringe line.
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Thymosin alpha-1 is a peptide 28 amino acids long, first pulled out of calf thymus extract in the 1970s. It acts on how T cells mature and signal. It is sold for immune support: long COVID, chronic infection, and general resilience.
It carries a large trial record, and that record is about acutely unwell hospital patients rather than healthy adults. Under the name thymalfasin it is an approved medicine in several countries, mainly for chronic hepatitis B. Its largest trial gave it to 1,106 people with sepsis. By day 28, 23.4% had died on the drug against 24.1% on placebo.
Each row starts with the same 10 mg vial and changes only the amount of water. More water makes the mixture less concentrated, so the same dose uses more syringe units.
| Water added | Concentration | Per U-100 unit | Draw for 1.6 mg | Nearest syringe line |
|---|---|---|---|---|
| 1 mL | 10.00 mg/mL | 100.0 mcg | 16.0 u · 0.160 mL | exactly 16 u |
| 2 mL | 5.00 mg/mL | 50.0 mcg | 32.0 u · 0.320 mL | exactly 32 u |
The vial, water and dose shown here are the calculator’s starting example for Thymosin alpha-1. Replace them with your own values. Every result in the table is calculated from those inputs.
Three of the four regimens on this page use the same single quantity. Only the interval changes between them, which is unusual on a research vial — most of the compounds here publish amounts that scale with body weight instead.
Trials dissolved one dose in a milliliter and injected that amount. The vial sizes shown here contain several times that amount, so one vial covers several trial doses. The studies do not tell you how much water to add to a multi-dose vial.
It also means a figure quoted from the approved labeling elsewhere describes a different container. The milligrams are comparable. The vial is not.
Because the amount is milligrams rather than micrograms, a vial holds only a handful of doses. So the question of how long a mixed vial keeps arrives much sooner here than on a compound drawn in micrograms.
No cited source gives a storage window for the mixed vial. The vial-life tool can still count doses and weeks of supply, but it cannot show how long the mixture stays usable.
The medicine exists under another name in several countries and has never been approved in the United States. Its trial record is large, and almost all of it ran in hospital in acutely unwell people.
None of those trials describes healthy adults, and the largest of them found no benefit on its main outcome. A real approval somewhere is genuine evidence, and it is not evidence about this use.
Alone in this group, the amount in the worked example is a quantity people genuinely received. Registered trials used it repeatedly, across several conditions. The problem here is not the number. It is everything arranged around it.
Trials dissolve one dose in a milliliter and inject the lot. The vials sold under this name hold several doses’ worth of powder in a single container.
Those two things are not in conflict, and the reason is worth knowing. A figure’s standing comes from where it was measured. A compound’s standing comes from who has reviewed it, and where.
The intervals on this page run from every twelve hours, through daily, to twice a week. One cancer schedule clusters injections inside a repeating cycle.
The trial protocol dissolves each dose immediately before it is given. Nothing in it describes keeping a mixed vial, because in a trial there is never one to keep.
The division is the one part of this page that does not change with which trial you are reading. Concentration, volume, draw, marks on the barrel: identical across every row on the page.
Mix 10 mg into 2 mL and one U-100 unit carries 50.0 mcg. The table shows how much peptide is in each numbered syringe line. These are conversion examples, not suggested doses.
| U-100 line | Volume | Mass (mcg) | Mass (mg) |
|---|---|---|---|
| 10 u | 0.10 mL | 500 mcg | 0.5 mg |
| 20 u | 0.20 mL | 1,000 mcg | 1 mg |
| 30 u | 0.30 mL | 1,500 mcg | 1.5 mg |
| 40 u | 0.40 mL | 2,000 mcg | 2 mg |
| 50 u | 0.50 mL | 2,500 mcg | 2.5 mg |
| 60 u | 0.60 mL | 3,000 mcg | 3 mg |
| 70 u | 0.70 mL | 3,500 mcg | 3.5 mg |
| 80 u | 0.80 mL | 4,000 mcg | 4 mg |
| 90 u | 0.90 mL | 4,500 mcg | 4.5 mg |
| 100 u | 1.00 mL | 5,000 mcg | 5 mg |
The math is only one part of the question. These guides cover the compound, published doses, side effects, mixing steps and supplies.
Thymosin alpha-1 — class, half-life and regulatory standing
The Thymosin alpha-1 reactions reported most often
Choosing a water volume for a 10 mg Thymosin alpha-1 vial
Mixing a 5 mg Thymosin alpha-1 vial, water volume by water volume
Every calculator on this site, Thymosin alpha-1 and the rest
What the Thymosin alpha-1 draw needs from the Zepbound vial draw