Thymulin Reconstitution Calculator, Units & Half-Life
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[Peptide · Compound guide]

Thymulin: reconstitution, units and half-life

Vial sizes · Worked example · Units chart · Half-life notes

What is thymulin?

Thymulin is a hormone made only by cells of the thymus gland: a nine-amino-acid peptide that needs zinc bound to it to work. It helps T cells mature. Lab-made thymulin is sold as a research peptide, but it is not approved as a drug in the US.

Also known as: Thymic hormone.

Common vial sizes

We could not confirm a standard vial size for thymulin, so check the label on yours. The 10 mg vial in the example below is only there to show the math.

Worked reconstitution example

Here is the math for a 10 mg vial mixed with 2 mL of bacteriostatic water, drawing 500 mcg with a U-100 insulin syringe (1 mL = 100 units).

  1. Concentration. 10 mg ÷ 2 mL = 5 mg/mL
  2. Volume to draw. 500 mcg ÷ 5 mg/mL = 0.1 mL
  3. Syringe units. 0.1 mL × 100 = 10 units
The amount here is an example to show the math, not a recommendation. How much to take is a decision for you and your prescriber.

Units chart at 5 mg/mL

10 mg vial + 2 mL water. Amounts are examples for the conversion, not doses.
AmountVolumeU-100 syringe
250 mcg0.05 mL5 units
500 mcg0.1 mL10 units
1 mg0.2 mL20 units

Same amount, different water volumes

Adding more water doesn't change how much thymulin is in the vial. It only spreads it over more liquid, so each draw is bigger and easier to read.

500 mcg from a 10 mg vial.
Water addedConcentrationVolumeU-100 syringe
1 mL10 mg/mL0.05 mL5 units
2 mL5 mg/mL0.1 mL10 units
3 mL3.33 mg/mL0.15 mL15 units
5 mL2 mg/mL0.25 mL25 units

For any other vial size or amount, the free peptide reconstitution calculator works backwards from the amount you want and suggests a water volume that lands on a clean syringe mark.

What is known in people?

Thymulin has been studied for decades as part of normal body function. In animals, thymulin and a lab-made analog reduced inflammation and pain in the brain, and gene therapy that makes thymulin prevented some hormone problems in mice born without a thymus (Reggiani 2009; Reggiani 2014).

We could not find a published trial that gave thymulin injections to people. Because thymulin needs zinc, zinc status matters: in a small pilot study of very old people, the authors reported higher thymulin activity after 2 months of zinc-fortified milk (Costarelli 2014).

Thymulin half-life and time to peak

  • Half-lifeNot listed
  • Time to peak (Tmax)Not listed

We could not find a published human half-life for this compound. Figures quoted online usually come from animal or cell studies, so we do not list one here.

How to track thymulin in Dose Track

  1. Add thymulin as a custom compound. Start typing its name and Dose Track fills in the details from its research library for you to check, and it sits next to everything else you take.
  2. Save your vial: enter the vial size and how much water you added. From then on every amount you log shows as syringe units, and the reconstitution planner suggests a water volume that lands on a clean mark.
  3. Log each shot. The app subtracts it from the vial, shows what is left, and warns you before you run out.
  4. Set reminders on your own schedule, whether that is daily, weekly or every few days.
  5. Your log is stored on your phone and no account is needed. Data only leaves it for features you choose, like AI answers and lab reading.

How Dose Track handles peptides · Reconstitution calculator · Half-life calculator

ThymalinThymic peptide extract Thymosin Alpha-1Thymalfasin, Zadaxin · half-life about 2 hours ThymogenThymagen, IM862 Zinczinc picolinate, zinc gluconate

Frequently asked questions

How much bacteriostatic water do I add to a 10 mg thymulin vial?+
There is no single right amount. More water makes each draw bigger and easier to measure; less water makes it smaller. For example, 2 mL in a 10 mg vial gives 5 mg/mL, so 500 mcg is 0.1 mL, or 10 units on a U-100 insulin syringe. That amount is only an example for the math, not a recommendation. The free Dose Track reconstitution calculator works it out for any vial and amount.
How many units is 500 mcg of thymulin?+
It depends on the concentration in your vial. At 5 mg/mL (10 mg mixed with 2 mL), 500 mcg is 0.1 mL, which is 10 units on a U-100 insulin syringe, where 1 mL is 100 units. Divide the amount by the concentration to get mL, then multiply by 100.
What is the half-life of thymulin?+
We could not find a published human half-life for this compound. Figures quoted online usually come from animal or cell studies, so we do not list one here.
Can I track thymulin in Dose Track?+
Yes. Thymulin is in Dose Track's research library, so when you add it as a custom compound its details are filled in for you to check. You can then log each shot next to your other compounds, save your vial and how much water you added so every amount shows in syringe units, see how much is left in the vial, and get reminders. Your log is stored on your phone and no account is needed. Data only leaves it for features you choose, like AI answers and lab reading.

Sources

  1. Reggiani PC, et al. The thymus-neuroendocrine axis: physiology, molecular biology, and therapeutic potential of the thymic peptide thymulin. Ann N Y Acad Sci. 2009;1153:98-106.
  2. Reggiani PC, et al. Physiology and therapeutic potential of the thymic peptide thymulin. Curr Pharm Des. 2014;20(29):4690-4696.
  3. Costarelli L, et al. Effects of zinc-fortified drinking skim milk (as functional food) on cytokine release and thymic hormone activity in very old persons: a pilot study. Age (Dordr). 2014;36(3):9656.

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