Longevity
Thymulin
Immunity
1
Amino acids
Molecular weight
Peptide
Type
Thymulin is a nonapeptide hormone exclusively secreted by thymic epithelial cells, discovered by Jean-François Bach in the 1970s. Unlike thymalin (a peptide extract mixture), thymulin is a single, defined 9-amino-acid peptide that requires zinc binding for biological activity. It plays a crucial role in T-cell differentiation and maturation within the thymus. Serum thymulin levels decline significantly with age and zinc deficiency, contributing to age-related immune decline (immunosenescence). Research has explored thymulin's potential in restoring immune function, managing autoimmune conditions, and as an anti-inflammatory agent.
Top researched benefits
Overview of Thymulin
Thymulin exerts its effects through binding to high-affinity receptors on T-lymphocytes and other immune cells. The zinc-thymulin complex is the biologically active form - without zinc, the peptide has no immunological activity. Thymulin promotes: (1) differentiation of immature T-cells into mature T-cell subsets, (2) modulation of cytokine release including IL-2 and interferon-gamma, (3) regulation of T-helper and T-suppressor cell balance, (4) enhancement of NK cell activity, and (5) anti-inflammatory effects through suppression of pro-inflammatory mediators. It also has neuroendocrine effects, influencing the hypothalamic-pituitary-adrenal axis.
Immune System Research
- Age-related decline in thymulin correlates with reduced immune function; supplementation may restore T-cell parameters.
- Promotes differentiation and maturation of T-lymphocytes in thymus.
- Thymulin activity depends on zinc; studied in zinc-depleted conditions.
Inflammatory And Autoimmune Research
- Research shows thymulin suppresses pro-inflammatory cytokines and mediators.
- Investigated for potential to restore immune balance in autoimmune states.
- Studied for effects on pancreatic beta cells and immune modulation in diabetes models.
Neuroendocrine Research
- Thymulin influences hypothalamic-pituitary-adrenal axis function.
- Some research suggests protective effects on neural tissue.
Storage
Reconstituted: 2-8°C, use within 4 weeks
Frequency
Daily during research protocols
Typical Dose
1-10mcg per injection (research protocols)
Cycle Duration
Varies by research protocol
Chemical Makeup
Key benefits
Essential for T-cell maturation and differentiation
Modulates immune responses (immunomodulatory)
Anti-inflammatory properties
Declines with age - restoration may combat immunosenescence
Well-defined single peptide (unlike extracts)
Studied in autoimmune disease research
Neuroendocrine regulatory effects
Zinc-dependent activity allows for regulation
Community interest
This peptide is still gaining traction in the community.
FTS | Zinc-Dependent Thymic Nonapeptide
This overview is informational and based on aggregated descriptions from studies and user reports.
Was it helpful?YesThymulin Molecular Information
View the scientifc details of Thymulin.
1
Amino Acids
Thymulin
Ala
Ala
Position 1
Molecular Weight
177.24DaChain Length
1Amino AcidsType
PeptideThymulin Protocols
Thymulin is typically administered via subcutaneous or intraperitoneal injection in research settings. As a small peptide, it can also be explored via intranasal delivery for CNS effects. Zinc status should be adequate for biological activity.
| Goal | Dosage | Frequency | Route |
|---|---|---|---|
| Research protocol (immune) | 1 | 1 week range | SubQ |
| Intranasal (experimental) | — | — | Intranasal |
Reconstitution Instructions
Materials needed:
Steps to reconstitute
- Ensure adequate zinc supplementation for activity
- Reconstitute with bacteriostatic water
- Inject water slowly down vial wall
- Gently swirl until dissolved
- Store refrigerated at 2-8°C
- Use within 4 weeks of reconstitution
Thymulin Cycle
The Thymulin Cycle section explains how long a typical cycle lasts and what to expect during each phase. Over time, your body can become less responsive with continuous use.
Taking breaks between cycles may help maintain effectiveness and support better overall results.
- Week 0-0
- Receptor binding and initial cellular signaling
- Day 1-7
- Immune cell modulation begins; cytokine profile changes
- Week 2-4
- T-cell differentiation effects; measurable immune parameters
- Week 0-0
- Long-term immune restoration in research models
Dosing tools
Thymulin Peptide Dosage Calculator
Calculate peptide doses with our visual syringe guide.
0.3mL / 30 units
5 units
0.050 mL
1 mL
2 mL
3 mL
5 mL
Custom
Conversion: 1,000 mcg = 1 mg
Injection Results
Based on your vial and dilution inputs.
Safe concentration range
Thymulin
SINGLE COMPOUNDVolume per injection
0.05
mL
Concentration
10.00
mg/mL
Doses per vial
20
doses
Total injections per vial
20 injections
How it works
Based on a 10 mg Thymulin vial diluted with 1 mL of bacteriostatic water, each 500 mcg injection equals 0.05 mL.
Research Purposes Only
These calculators are provided for educational and research purposes only. Always verify calculations and consult with qualified professionals. The information provided is not medical advice. Peptides should only be used in accordance with applicable laws and regulations.
Reference Guide
Dosing Cycle
- Peptide
- Thymulin
- Dosing
- 1-10mcg per injection (research protocols)
- Dosing Frequency
- Daily during research protocols
- Cycle Duration
- Varies by research protocol
- Storage
- Reconstituted: 2-8°C, use within 4 weeks
Note: Triple agonist; microdose for fewer side effects
Reconstitution Tips
- Use bacteriostatic water (BAC) — contains 0.9% benzyl alcohol for preservation
- Inject water slowly — aim down the vial wall, not directly onto powder
- Never shake — gently swirl or roll the vial until dissolved
- Store properly — refrigerate at 2-8°C after reconstitution
- Use within 28 days — most reconstituted peptides remain stable for about 4 weeks
- Keep sterile — always clean vial tops with alcohol before drawing
Peptide Interactions
Research suggestions of Thymulin interactions with other common peptides and substances.
Longevity
epi
Immunity
Epitalon
COMPATIBLE
Different mechanisms; no known negative interactions.
Longevity
thy
Immunity
Thymalin
COMPATIBLE
Thymalin is a peptide mixture while thymulin is a single defined peptide; can complement each other.
Side effects
Contraindications
Autoimmune diseases (use with medical supervision)
Organ transplant recipients on immunosuppression
Pregnancy or breastfeeding
Known hypersensitivity to thymic peptides
Stop signs
Signs of allergic reaction
Unexpected immune changes
Bad signs
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Frequently asked questions
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Current research explores peptides for longevity, muscle recovery, wound healing, metabolic disorders, and neuroprotection. Scientists are also investigating peptide-based drug delivery and targeted therapies that could offer more precise treatment options.
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Peptides work by binding to receptors on cells and triggering specific biological responses. Depending on the peptide, they may promote growth hormone release, support collagen production, modulate inflammation, or influence neurotransmitter activity—each with different implications for health and wellness.
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Research use of peptides typically follows institutional review board (IRB) protocols and regulatory guidelines. Dosage, administration route, and safety monitoring should align with published literature and applicable regulations in your jurisdiction.
What is the difference between peptides and proteins?
Peptides are short chains of amino acids (typically under 50), while proteins are longer chains that fold into complex structures. Peptides are often more stable, easier to synthesize, and can cross cell membranes more readily, making them attractive for therapeutic applications.
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Some peptides are bioavailable orally, but many are broken down by digestive enzymes before reaching the bloodstream. Subcutaneous injection, nasal administration, or other routes are often used in research to improve bioavailability. The optimal route depends on the specific peptide.
ThymulinResearch References
Thymulin is a well studied compound
Thymulin
Thymulin is a well studied compound
Thymulin (FTS) - A Thymic Hormone
Comprehensive review of thymulin discovery, structure, and immunological functions.
n.d.
The neuroendocrine role of thymulin
Thymulin modulates hypothalamic-pituitary-adrenal axis and has neuroendocrine effects beyond immunity.
n.d.
Zinc and thymulin
Zinc is essential for thymulin biological activity; zinc deficiency causes functional thymulin deficiency.
n.d.
Thymulin and aging
Serum thymulin levels decline dramatically with age, correlating with immunosenescence and increased infection susceptibility.
n.d.