Thymulin
Thymulin is a zinc-dependent nonapeptide hormone produced by thymic epithelial cells, first characterized for its role in T-lymphocyte differentiation and maturation. Its biological activity is strictly zinc-dependent, meaning adequate zinc status is required for the peptide to bind its receptor and exert effects. Research has explored thymulin's role in immune senescence, as circulating levels decline with age, alongside its potential to modulate inflammatory and autoimmune processes. Most available evidence comes from animal and in vitro studies, with more limited human clinical data.
Reported benefits
- Studied for support of T-lymphocyte differentiation and thymic function
- Explored in research on age-related immune decline (immunosenescence)
- Investigated for modulation of autoimmune and inflammatory markers in animal models
- May support sleep-related neuroendocrine signaling in preclinical research
How it works
Thymulin requires zinc binding to achieve its active conformation, after which it engages receptors on T-lymphocytes to promote differentiation and functional maturation, particularly within the thymus. It has also been studied for effects on cytokine regulation and modulation of autoimmune and inflammatory activity in animal models, including reported effects on sleep and neuroendocrine signaling. Its dependence on zinc status links thymulin research to broader questions about micronutrient status and immune aging.
Dosing ranges
| Tier | Dose | Frequency |
|---|---|---|
| Low | 100 mcg | daily |
| Moderate | 200 mcg | daily |
| High | 400 mcg | daily |
Estimate your dose
Dose estimator
Educational estimate for Thymulin, scaled to body size. Not medical advice.
Read before using
This tool produces a rough, educational estimate by scaling commonly-published research ranges to lean body mass. It is not a prescription, medical advice, or a substitute for a licensed clinician. Most peptides use fixed dosing, not weight-based dosing. Individual needs vary. You are solely responsible for how you use this information.
Mixing & syringe units
Target dose follows the estimate above. Change it there, or edit it directly below.
Reconstitution calculator
How much water to add and how many insulin-syringe units to draw for Thymulin. Educational only.
Draw to this mark
4units
= 0.04 mL for a 200 mcg dose
Concentration
5,000 mcg/mL
Doses per vial
50
A U-100 syringe reads 100 units per mL. This is a reconstitution math helper only, not a prescription or dosing advice. Verify every calculation and consult a qualified healthcare provider.
Possible side effects
Stacking notes
Sometimes discussed alongside Thymosin Alpha-1 for combined thymic-support research protocols; zinc status is often addressed concurrently
Common protocols
Common questions
What is Thymulin used for?
Thymulin is a zinc-dependent nonapeptide hormone produced by thymic epithelial cells, first characterized for its role in T-lymphocyte differentiation and maturation. Its biological activity is strictly zinc-dependent, meaning adequate zinc status is required for the peptide to bind its receptor and exert effects. Research has explored thymulin's role in immune senescence, as circulating levels decline with age, alongside its potential to modulate inflammatory and autoimmune processes. Most available evidence comes from animal and in vitro studies, with more limited human clinical data. Reported benefits include studied for support of t-lymphocyte differentiation and thymic function, explored in research on age-related immune decline (immunosenescence), investigated for modulation of autoimmune and inflammatory markers in animal models.
What is a typical Thymulin dose?
Reported ranges run 100-400 mcg. A low protocol is 100 mcg daily, and a high protocol is 400 mcg daily. This is reference information, not a dosing recommendation.
What is the half life of Thymulin?
Short, estimated at under 1 hour. That is what sets the dosing frequency, and it is why the timing guidance is morning.
How is Thymulin administered?
Subcutaneous: into fat, under the skin.
How long is a Thymulin cycle?
4-8 weeks on, followed by 4 weeks off. Adequate dietary or supplemental zinc status is often discussed as a prerequisite for expected activity
What are the side effects of Thymulin?
Reported side effects include injection site irritation, limited human safety and dosing data, effects may be blunted by zinc deficiency, complicating interpretation of use, theoretical immune modulation risks in autoimmune populations. Evidence level for this compound is moderate evidence.
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Educational use only, not medical advice. This profile is provided for research and educational purposes. Thymulin may be a research compound or a prescription medication; nothing here is intended to diagnose, treat, cure, or prevent any disease. Dosing figures reflect commonly-published research ranges, not a prescription. Consult a qualified healthcare provider before making any health decision. Read the full disclaimer →