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Bioalmanac

Thymulin

FTS · Facteur thymique sérique · Serum thymic factor

Preclinical

Status reviewed 18 Aug 2026

A genuine thymic hormone with real immunology behind it, and no clinical development. It only works with zinc bound to it, which is the most useful fact about it.

Storage

Freeze-dried powder
Refrigerated at 2–8 °C, protected from light.
After mixing
Refrigerated at 2–8 °C. Do not freeze once mixed.
Long-term, frozen
Unopened powder is stable at −20 °C or colder.

Reconstitution — 10 mg vial, 1000 mcg dose

On a 1 mL U-100 syringe. Check every figure against your own vial before drawing.

Water addedConcentrationVolume to drawUnitsDoses per vial
1 mL10 mg/mL0.1 mL10 units10
2 mL5 mg/mL0.2 mL20 units10
3 mL3.333 mg/mL0.3 mL30 units10
5 mL2 mg/mL0.5 mL50 units10

Dose ranges reported in sources

Descriptions of what sources report, not recommendations.

GoalRangeFrequencySource
Commonly described community protocol500–1500 mcgDaily in short coursesCommunity practice

When to stop

  • Any flare of an existing autoimmune condition.
  • Any allergic response: rash, hives, facial swelling or difficulty breathing. Seek urgent care.
  • Swollen lymph nodes that persist.
  • Fever, or an injection site that becomes hot or produces pus.

Not approved for human use in any jurisdiction, and never taken into a registered clinical trial as a treatment. Its physiology is well documented; its therapeutic use is not. Sold only as a research chemical.

Arithmetic on values you enter. Not medical advice. Not reviewed by a clinician. · bioalmanac.com/peptides/thymulin

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