Thymalin
Also known as: Thymus Bioregulator, Thymus Peptide Extract, Thymarin
Thymalin is a polypeptide complex isolated from calf thymus glands (developed by the Russian Gerontology Institute), shown to restore immune function, extend lifespan, and reverse thymic involution. Clinical studies demonstrate improved immune parameters and up to 40% reduction in mortality in elderly patients.
Half-Life
Not well characterized as a complex extract; individual peptides have varying kinetics
Route
SubQ, IM
Category
Immune Support, Anti-Aging & Longevity
Studies
30 references
Key Benefits
- Restores thymic function and T-cell immunity
- Extends healthy lifespan (documented in long-term studies)
- Reduces infectious disease incidence in elderly
- Normalizes immune parameters in immunodeficiency
- Anti-tumor immune surveillance
- Improves vaccine response in elderly
- Reduces cardiovascular mortality (40% in landmark Russian study)
- Normalizes neuroendocrine function
Mechanism of Action
Thymalin is a natural thymus gland extract containing multiple low-molecular-weight peptides (including thymosin, thymulin, thymopentin, and others) that restore T-lymphocyte maturation and differentiation. The thymus involutes with age, impairing cellular immunity. Thymalin reactivates thymic function, increasing CD3+, CD4+, CD8+ T-cells, NK cells, and normalizing T-helper/T-suppressor ratios. It also stimulates cytokine production (IL-1, IL-2, IFN-γ) and enhances phagocytic activity. Long-term use has demonstrated neuroendocrine normalization and measurable lifespan extension in animal and human studies.
Dosing Protocols
Immune Restoration / Longevity Protocol
- Dose
- 10 mg IM or SC daily
- Frequency
- Once daily
- Timing
- Any time of day
- Cycle
- 10-day course, 1–3x per year
Classic Russian protocol: 10 mg/day for 10 days, repeated annually; landmark Khavinson study used this protocol over 6–8 years
Maintenance Anti-Aging
- Dose
- 5–10 mg SC
- Frequency
- Daily for 10 days
- Timing
- Same time each day
- Cycle
- 10 days every 6 months
Minimum effective protocol; higher frequency may be used in severe immunodeficiency
Calculate your draw volume
Enter your vial size and BAC water to get exact injection volumes
Side Effects
- Very well tolerated in decades of Russian clinical use
- Mild injection site reactions
- Rare: mild allergic reaction (natural extract)
- Transient flu-like symptoms on initiation (immune activation)
Contraindications
Caution in autoimmune diseases (immune stimulation may worsen). Not recommended in organ transplant patients (may provoke rejection). Avoid in atopic allergy to bovine products.
Storage
Store at 2–8°C. Protect from light. Reconstituted solution use within 24 hours. Lyophilized vials: up to 2 years at refrigerator temperature.
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Clinical Research
- 1.Expression features of T-lymphocytes, B-lymphocytes and macrophages in the post-traumatic regenerate of the mandible rats under conditions of filling a bone defect with hydroxyapatite-containing osteotropic material and thymalin injecting the surrounding soft tissues
Boiko AA, Malanchuk VA, Myroshnychenko MS, Markovska OV, Shapkin AS, Marakushyn DI · Polski merkuriusz lekarski : organ Polskiego Towarzystwa Lekarskiego · 2024PubMed Verified
- 2.Reparative osteogenesis in mandible in cases of filling a bone defect with hydroxyapatite-containing osteotropic material and injecting the surrounding soft tissues with thymalin: experimental and morphological study
Boiko AA, Malanchuk VA, Myroshnychenko MS · Wiadomosci lekarskie (Warsaw, Poland : 1960) · 2024PubMed Verified
- 3.The Influence of KE and EW Dipeptides in the Composition of the Thymalin Drug on Gene Expression and Protein Synthesis Involved in the Pathogenesis of COVID-19
Linkova N, Khavinson V, Diatlova A, Petukhov M, Vladimirova E, Sukhareva M et al. · International journal of molecular sciences · 2023PubMed Verified
- 4.Peptides Regulating Proliferative Activity and Inflammatory Pathways in the Monocyte/Macrophage THP-1 Cell Line
Avolio F, Martinotti S, Khavinson VK, Esposito JE, Giambuzzi G, Marino A et al. · International journal of molecular sciences · 2022PubMed Verified
- 5.Results and Prospects of Using Activator of Hematopoietic Stem Cell Differentiation in Complex Therapy for Patients with COVID-19
Khavinson VK, Kuznik BI, Trofimova SV, Volchkov VA, Rukavishnikova SA, Titova ON et al. · Stem cell reviews and reports · 2021PubMed Verified
- 6.Thymalin: Activation of Differentiation of Human Hematopoietic Stem Cells
Khavinson VK, Linkova NS, Kvetnoy IM, Polyakova VO, Drobintseva AO, Kvetnaia TV et al. · Bulletin of experimental biology and medicine · 2020PubMed Verified
- 7.Effect of Thymalin on the Tumor and Thymus under Conditions of Activation Therapy In Vivo
Zhukova GV, Schikhlyarova AI, Barteneva TA, Shevchenko AN, Zakharyuta FM · Bulletin of experimental biology and medicine · 2018PubMed Verified
- 8.Chornobyl catastrophe: cytogenetic effects of low dose ionizing radiation and their modification
Domina EA · Experimental oncology · 2016ReviewPubMed Verified
- 9.Chrono- and Immunocorrection of Inflammatory Disorders of Internal Reproductive Organs in Women of Reproductive Age
Litvinenko GI, Shurlygina AV, Dergacheva TI, Mel'nikova EV, Trufakin VA · Bulletin of experimental biology and medicine · 2015Clinical TrialPubMed Verified
- 10.New data on the involvement of ectodermal epithelium in extrathymic differentiation of human T-lymphocytes
Khlystova ZS, Kalinina II, Shmeleva SP · Bulletin of experimental biology and medicine · 2004PubMed Verified
- 11.Immuno-, phagocytosis-modulating, and antitoxic properties of amino acids and peptide preparations
Belokrylov GA, Derevnina OY, Molchanova IV, Sorochinskaya EI · Drug development and industrial pharmacy · 1998PubMed Verified
- 12.Peptides of pineal gland and thymus prolong human life
Khavinson VKh, Morozov VG · Neuro endocrinology letters · 2003RCTPubMed Verified
- 13.Thymalin in developing respiratory organs of human fetus
Khlystova ZS, Kalinina II, Shmeleva SP · Bulletin of experimental biology and medicine · 2003PubMed Verified
- 14.Modulating and protective effects of thymic peptides in lymphoid tissue culture
Chalisova NI, Khavinson V, Nozdrachev AD · Doklady biological sciences : proceedings of the Academy of Sciences of the USSR, Biological sciences sections · 2001PubMed Verified
- 15.Modern Immunotherapy in Clinical Medicine: Present and Future
Nesterova IV · Russian journal of immunology : RJI : official journal of Russian Society of Immunology · 1999PubMed Verified
- 16.Contemporary Views on the Nature and Clinical Application of Thymus Preparations
Arion VY, Zimina IV, Lopuchin YM · Russian journal of immunology : RJI : official journal of Russian Society of Immunology · 1997PubMed Verified
- 17.Age-related changes of thymalin content in human epidermis
Khlystova ZS, Kalinina II, Shmeleva SP, Ryabchikov OP, Khavinson VKh · Bulletin of experimental biology and medicine · 2002PubMed Verified
- 18.Thymic hormones in human fetal skin epidermis
Khlystova ZS, Kalinina II, Khavinson VKh · Bulletin of experimental biology and medicine · 2002PubMed Verified
- 19.Peptides and Ageing
Khavinson VKh · Neuro endocrinology letters · 2002ReviewPubMed Verified
- 20.Immunomodulatory synthetic dipeptide L-Glu-L-Trp slows down aging and inhibits spontaneous carcinogenesis in rats
Anisimov VN, Khavinson VK, Morozov VG · Biogerontology · 2000PubMed Verified
- 21.Development of endocrine and lymphocytopoietic functions of the thymus in human embryogenesis
Khlystova ZS, Kalinina II, Shmeleva SP, Ryabchikov OP · Bulletin of experimental biology and medicine · 2000PubMed Verified
- 22.Natural and synthetic thymic peptides as therapeutics for immune dysfunction
Morozov VG, Khavinson VK · International journal of immunopharmacology · 1997PubMed Verified
- 23.Lysosomal glycosidases in different populations of human thymocytes
Ushakova NA, Sirina EG, Preobrazhenskaya ME, Yarilin AA · Biochemistry and molecular biology international · 1995PubMed Verified
- 24.Norcolut with immune modulators in the complex treatment for hyperplastic uterine processes
Zaporozhan VN, Khait OV, Tumasyan KP · Clinical and experimental obstetrics & gynecology · 1993PubMed Verified
- 25.Age-dependent experimental tumor dissemination of murine melanoma B16
Baumgart J, Zippel D · Archivum immunologiae et therapiae experimentalis · 1991PubMed Verified
- 26.Application of thymic factor "Thymalin" in complex treatment of endometrial cancer patients
Bakhidze EV, Bokhman JaV · European journal of gynaecological oncology · 1990PubMed Verified
- 27.Age-dependent antileukemic action and suppression of immune response by 1,4-benzoquinone-guanylhydrazone-thiosemicarbazone (ambazone) in mice
Baumgart J, Wisniewski HG, Amlacher R, Zhukovskaya NV, Rentz E · Neoplasma · 1989PubMed Verified
- 28.Influence of thymic preparations on the result of experimental infection with Taenia crassiceps (Zeder, 1800) in ICR mice
Hermánek J, Prokopic J · Folia parasitologica · 1989PubMed Verified
- 29.Experimental and clinical study of the thymus polypeptide factor thymalin
Safronov BN, Morozov VG, Khavinson VKh, Belokrylov GA · Human physiology · 1984PubMed Verified
- 30.Studies of the thymus in mice bearing the Lewis lung carcinoma. II. Modulation of thymic natural killer activity by thymulin (FTS-Zn) and the antimetastatic effect of zinc
Kaiserlian D, Savino W, Dardenne M · Clinical immunology and immunopathology · 1983PubMed Verified
Medical disclaimer: This information is for educational purposes only and does not constitute medical advice. Many compounds listed are research chemicals not approved for human use. Always consult a qualified healthcare professional before starting any protocol.
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