Thymalin
Thymus Peptide · Thymogen
A thymus-derived peptide that restores immune function and supports longevity
Typical Dose
10 mg per day for 10 days
Route
Subcutaneous
Frequency
Daily for 10-day courses, repeated 2–3 times per year
Cycle
10-day courses, 2–3 times per year
Overview
Thymalin is a natural peptide mixture extracted from the thymus gland. Think of it as a concentrated dose of the signals your own thymus uses to train immune cells. As we age, the thymus shrinks and becomes less active — a process that starts in your 20s and accelerates after 40. This is one of the main reasons our immune systems weaken with age. Thymalin has been studied in Russia for decades as a way to essentially wake the thymus back up and restore immune function in aging populations.
Key Benefits
Mechanism of Action
Thymalin works by providing the thymus gland with the peptide signals it needs to produce and mature T-cells properly. As we age, the thymus produces fewer of these signals on its own. Thymalin essentially supplements what the thymus has lost. It helps balance the ratio of different T-cell types, activates natural killer cells (which hunt down viruses and abnormal cells), and helps coordinate the immune system's communication network. The result is a more balanced, responsive immune system.
Dosing Protocol
Typical Dose
10 mg per day for 10 days
Dose Range
5–20 mg per day
Frequency
Daily for 10-day courses, repeated 2–3 times per year
Route
Subcutaneous or intramuscular injection
Cycle Length
10-day courses, 2–3 times per year
CLINICAL NOTES
Thymalin is typically used in 10-day treatment courses rather than continuous daily use. Most research comes from Russian clinical studies. Often combined with Epithalon for comprehensive longevity protocols.
Side Effects & Safety
IMPORTANT DISCLAIMER
This information is for educational purposes only. Always consult a qualified healthcare provider before starting any peptide protocol. Individual responses vary and medical supervision is recommended.
Research References
Common Stacks
Thymalin is a thymic peptide with broad immune and longevity effects. It pairs well with other immune and anti-aging peptides.
Both are thymic peptides — Thymalin for broad immune restoration, TA-1 for adaptive immune modulation.
Thymalin + Epitalon is a classic longevity combination targeting immune restoration and telomere health.
LL-37 adds antimicrobial coverage to Thymalin's immune-modulating effects.
Frequently Asked Questions
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Related Peptides
Compounds often researched alongside Thymalin
Thymosin Alpha-1
A thymus-derived peptide for immune modulation and antiviral defense
LL-37
A natural antimicrobial peptide with broad-spectrum immune defense
Cartalax
A Russian peptide bioregulator studied for cartilage repair and joint health
Epitalon
A telomere-lengthening peptide for cellular longevity