DG Peptide Protocols
Well StudiedLongevityImmune

Thymalin

Thymus Extract

Thymic Peptide Bioregulator | Immune Modulator

Half-life
Not established (complex mixture); effects persist for weeks
Chain length
Variable (peptide mixture)
Reference frequency
Daily for 5-10 days, then break

Research overview

DoseGear research brief

Thymalin is a natural peptide bioregulator derived from calf thymus gland, developed in the Soviet Union in the 1970s. It contains a mixture of thymic peptides that support immune restoration, anti-aging, and tissue regeneration. Research spanning decades has shown significant geroprotective effects, with studies demonstrating up to 2-fold reduction in mortality rates and 4-fold reduction when combined with Epithalamin.

Mechanism of action

Thymalin's immunoprotective action stems from short peptides (KE, EW, EDP) that specifically bind to double-stranded DNA and histone proteins to regulate gene expression. It stimulates differentiation and activity of T-lymphocytes, especially CD4+ and CD8+ cells, promotes cytokine regulation, enhances antigen response, and stimulates stem cell differentiation. It also affects gerontogene activity and immune system protein synthesis.

Compound background

Development & research timeline

Study windows describe what researchers measured, not when an individual should expect a result.

Origin & development

Calf-thymus peptide extract developed in Soviet-era research.

What it is researched for

Immune regulation and aging-related research involving mixed thymic-peptide immunoregulatory effects.

Research observation window

A cited elderly-subject study followed outcomes over 6–8 years; this does not establish short-term onset or prove longevity benefit.

Reference data

Lyophilized vial injectable protocols

Not personalized dosing instructions

Only injectable vial references are shown. Nasal, topical, and unsupported non-vial schedules are excluded.

No sourced lyophilized-vial injectable protocol is listed for this profile.

Safety context

Reported side effects

  • Injection site reactions (mild)
  • Practically no side effects reported

Contraindications & cautions

  • Autoimmune diseases (use with caution)
  • Organ transplant recipients (immunosuppression needed)
  • Pregnancy or breastfeeding
  • Known hypersensitivity

Scientific references

  1. 01

    The Use of Thymalin for Immunocorrection and Molecular Aspects of Biological Activity

    Scientific citationThe Use of Thymalin for Immunocorrection and Molecular Aspects of Biological Activity. International Journal of Molecular Sciences (2021).
  2. 02

    Peptides of Pineal Gland and Thymus Prolong Human Life

    Scientific citationPeptides of Pineal Gland and Thymus Prolong Human Life. Neuroendocrinology Letters (2003).
  3. 03

    Peptide Drug Thymalin Regulates Immune Status in Severe COVID-19 Older Patients

    Scientific citationPeptide Drug Thymalin Regulates Immune Status in Severe COVID-19 Older Patients. Advances in Gerontology (2021).
  4. 04

    Effect of Thymalin on Tumor and Thymus in Activation Therapy

    Scientific citationEffect of Thymalin on Tumor and Thymus in Activation Therapy. Bulletin of Experimental Biology and Medicine (2018).

This DoseGear profile combines published scientific literature with lyophilized-vial protocol references. Citations are provided for independent review.

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