What is thymogen peptide?
Thymogen reconstitution is a short calculation: the mg in the vial, the BAC water you add, and what each U-100 syringe unit holds as a result. Thymogen itself is one of the smallest compounds sold as a research peptide. It is a dipeptide, just two amino acids joined together: L-glutamic acid and L-tryptophan, written Glu-Trp or EW. Its nonproprietary name is oglufanide, and transliterated labels may spell it Timogen.
Thymogen was developed in Russia as a synthetic compound with one defined structure, which makes its label mass easy to interpret: every milligram is the same molecule. This page makes no statement about what thymogen does in the body; it covers the arithmetic only.
Thymogen vs thymalin: a defined dipeptide, not an extract
Thymogen is often confused with thymalin because the names are similar and both come from the same Russian thymus-peptide research tradition. They are different products. Thymalin is an extract from animal thymus tissue containing many polypeptides. Thymogen is a single synthetic molecule of two amino acids, made in a lab rather than extracted.
On a label, that means a thymogen 10mg vial states the mass of one compound, while a thymalin vial states the mass of a mixture. The calculator math is the same for both, but a vial of one is never a stand-in for the other.
How much BAC water for a thymogen vial?
Research vials are usually labeled thymogen 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). Because a dipeptide is so small, 10 mg of thymogen contains far more individual molecules than 10 mg of a long peptide, but the calculator works in mass, so that does not change the numbers. The BAC water to peptide ratio guide explains the pattern.
Worked example: thymogen 10mg 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 500 mcg, and a thymogen 10mg vial is mixed with 5 mL of BAC water:
The math: 10 mg ÷ 5 mL = 2 mg/mL (2,000 mcg/mL), which is 20 mcg per unit. 500 mcg ÷ 2,000 mcg/mL = 0.25 mL = 25 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.
What the thymogen calculator does and doesn’t do
The calculator answers one question: how many units on a U-100 syringe line up with an amount you already have, for your vial size and water volume. It 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 just holds fewer of them. If a result looks wrong, you can check the calculator math by hand.
Thymogen reconstitution notes and status
Supplier instructions vary, so the label comes first. Some suppliers specify bacteriostatic water; others list sterile water or saline. Some product sheets note that the dipeptide dissolves quickly and needs only gentle swirling, and many list refrigeration after mixing. Thymogen is also made in forms other than powder vials, such as ready-made solutions; this calculator applies only to powder you reconstitute yourself. Enter the exact water volume you used. General steps are in the peptide reconstitution guide.
Thymogen is not an FDA-approved drug, and vials sold online are labeled for research use only. A correct calculation cannot confirm identity, purity, sterility or stability; the result is only as good as the label it starts from.
Thymogen FAQ
How much BAC water do you add to a thymogen 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.
What is thymogen peptide made of?
Thymogen is a synthetic dipeptide of two amino acids, L-glutamic acid and L-tryptophan, often written Glu-Trp. Its nonproprietary name is oglufanide.
Is thymogen the same as thymalin?
No. Thymogen is a single synthetic dipeptide, while thymalin is an extract of many polypeptides from thymus tissue. They are separate products.
Does this page give a thymogen dose?
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 thymogen FDA-approved?
No. Thymogen is not an FDA-approved drug, and vials sold online are labeled for research use only.