What is thymalin?
People searching for thymalin dosage usually want to turn an amount into a syringe mark, and that conversion is what this page covers. Thymalin is not a single peptide. It is an extract: a complex of polypeptides isolated from the thymus of young cattle, freeze-dried into a powder. It was developed in Russia, and transliterated labels may spell it Timalin or Thymalinum.
Because it is an extract, thymalin has no single sequence or molecular weight. The mg on the label is the mass of the whole extract, not of one defined molecule. That matters for reading a label, but not for the calculator, which works from whatever mg the vial states. This page makes no statement about what thymalin does in the body.
Thymalin vs thymogen: not the same product
Thymalin and thymogen come from the same Russian thymus-peptide research tradition and have similar names, so they are easy to confuse. They are different products. Thymalin is a natural extract containing many polypeptides. Thymogen is a single synthetic dipeptide, just two amino acids long, with one defined structure.
That difference shows up on the label: a thymogen vial states the mass of one compound, while a thymalin vial states the mass of a mixture. The calculator treats both the same way, since concentration is simply vial mg ÷ water mL, but a vial of one is never a substitute for the other.
How much BAC water for a thymalin vial?
Research vials are usually labeled thymalin 10mg or 20 mg of freeze-dried powder. The mg in the vial is fixed; the volume of bacteriostatic water you add sets the concentration. The chart shows micrograms per unit on a U-100 syringe at common water volumes.
| BAC water | 10 mg vial | 20 mg vial |
|---|---|---|
| 1 mL | 100 mcg/unit 10 mg/mL | 200 mcg/unit 20 mg/mL |
| 2 mL | 50 mcg/unit 5 mg/mL | 100 mcg/unit 10 mg/mL |
| 3 mL | 33.33 mcg/unit 3.333 mg/mL | 66.67 mcg/unit 6.667 mg/mL |
| 5 mL | 20 mcg/unit 2 mg/mL | 40 mcg/unit 4 mg/mL |
Each cell shows mcg per unit on a U-100 syringe (100 units = 1 mL) and the resulting concentration.
Read across a row to compare the two sizes at the same volume, or down a column to see how the same vial thins out as water is added. Each cell is vial mg × 1,000 ÷ (water mL × 100). There is no single correct volume. The BAC water to peptide ratio guide explains the pattern.
Worked example: thymalin reconstitution in syringe units
The calculator runs three steps. Vial mg ÷ water mL gives the concentration. The amount you enter ÷ that concentration gives the volume in mL. Volume × 100 gives U-100 units. For example, if the amount you already have is 1 mg, and a thymalin 10mg vial is mixed with 2 mL of BAC water:
The math: 10 mg ÷ 2 mL = 5 mg/mL (5,000 mcg/mL), which is 50 mcg per unit. 1 mg ÷ 5,000 mcg/mL = 0.2 mL = 20 units on a U-100 syringe.
That amount is an arbitrary figure picked because it comes out clean. It is not a suggestion. A 20 mg vial with the same water doubles the concentration and halves the units for the same amount. Keep everything in one unit before dividing: 1 mg = 1,000 mcg. The mg to mcg conversion guide covers that step.
Thymalin dosage calculator: what the numbers mean
A thymalin dosage calculator answers one question: how many units on a U-100 syringe match an amount you already have, for your vial size and water volume. You bring the amount; the calculator returns a concentration, a volume in mL and a unit mark. It does not set, suggest or check a dose, a schedule or a frequency. Those come from product labeling and a qualified professional.
Units are the same size on every U-100 syringe: 100 units = 1 mL and 1 unit = 0.01 mL. A 0.3 mL or 0.5 mL syringe holds fewer of them. If a result looks off, you can check the calculator math by hand.
Thymalin reconstitution notes and status
Supplier instructions vary, so the label comes first. Some suppliers specify bacteriostatic water; others list sterile water or saline. Because thymalin is an extract rather than a pure peptide, some product sheets note that the solution may look slightly different from batch to batch. Many list refrigeration after mixing and a use-by period for the mixed vial. Whatever volume you use, enter that exact figure in the calculator; general steps are in the peptide reconstitution guide.
Thymalin is not an FDA-approved drug, and vials sold online are labeled for research use only. As an animal-tissue extract, its composition depends on how it is made, so a correct calculation cannot confirm identity, purity, sterility or stability. Treat the result as arithmetic based on the label.
Thymalin FAQ
How much BAC water do you add to a thymalin 10mg vial?
There is no single required volume. The chart shows how 1, 2, 3 and 5 mL change the mcg per unit. Follow the product labeling for the diluent and volume, then enter the volume you used.
Does this page give a thymalin dosage?
No. It converts an amount you already have into mL and U-100 syringe units for your vial and water volume. It does not recommend a dose, schedule or frequency.
Is thymalin the same as thymogen?
No. Thymalin is a natural thymus extract containing many polypeptides. Thymogen is a single synthetic dipeptide. They are separate products with separate labels.
Is thymalin a single peptide?
No. It is a mixture of polypeptides extracted from thymus tissue, so the mg on the label is the mass of the whole extract.
Is thymalin FDA-approved?
No. Thymalin is not an FDA-approved drug, and vials sold online are labeled for research use only.