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Research-grade compound with certificate of analysis. Full analytical testing on every lot.
Snapshot:
Thymalin is a polypeptide isolated from the thymus gland and has been studied for its role in supporting immune function. Research suggests it has a role in influencing T-cell activity, cytokine modulation, oxidative defense, aging processes, and cellular resilience.
Thymalin is a polypeptide, naturally derived and isolated from the thymus gland [1]. Endogenous Thymalin naturally declines with age, paralleling thymic involution and reduced immune efficiency. It consists of short peptides, typically 2–8 amino acids in length, that support gene expression in immune and hematopoietic cells [1]. The dipeptide L-Glu-L-Trp, often referred to as the EW peptide, is the bioactive fragment with the most notable immunoregulatory properties [2]. Research demonstrates it can influence cytokine production, enhance communication between immune cells, and contribute to a healthier immune system responsiveness [2]. Because it can act at low concentrations, it has become a promising candidate in targeted immunomodulation strategies [1].
Although often confused with Thymulin, Thymalin is a polypeptide extract, while Thymulin is a zinc-dependent non-peptide hormone [1, 3]. Thymalin is thought to regulate thymic activity more broadly than Thymulin, which appears to enhance specific thymic hormone functions [1, 4].
Thymalin is clinically studied as a potential molecule that supports immune balance, antioxidant defenses, and tissue repair processes and promotes healthy cellular aging through multiple biologically active pathways.
Thymalin supports immune function by promoting T-cell differentiation, improving cytokine signaling, and enhancing lymphocyte activity [1]. In hematopoietic stem cells, it reduced the expression of CD44 and CD117, which are molecules associated with early stem cell proliferation and maintenance. This indicated a shift toward the development of mature immune cells [1]. These cell also had significant increases in CD28 expression, found on CD4+ and CD8+ T-lymphocytes, critical for T-cell activation and viral immunity [1].
In a comparative study, Thymalin significantly improved immune cell counts in those with respiratory viral infection, whereas standard therapy had minimal effects [5]. It increased total leukocyte counts by 25% and lymphocytes by 92%, despite lower baseline lymphocyte counts compared to controls [5]. Monocytes measured in blood rose by 55% with Thymalin compared to 42% on standard therapy, and eosinophils increased 4.6-fold versus 3.1-fold, respectively [5]. Thymalin also enhanced adaptive and innate immunity, raising T- and B-lymphocytes and NK cells by 2–2.4 times and boosting CD4+, CD8+, and CD3+HLA-DR+ cells by 2.2–3.4 times. In contrast, standard treatment including antiviral, antibiotics, and oxygen had no significant impact [5]. These findings suggest Thymalin has a role in restoring immune competence in conditions where immunity may be compromised.
Thymalin has demonstrated broad anti-inflammatory and regenerative potential. Its short peptide composition, particularly EW and KE dipeptides, can penetrate the cell nucleus and bind to specific DNA and histone regions [6]. This capability modulates gene expression involved in cytokine production, antioxidant defense, and tissue repair processes [5].
Molecular modeling shows that the EW and KE peptides interact with DNA regions that regulate key inflammatory genes, including ACE2, CYSLTR1, and CHUK – proteins deeply involved in driving cytokine-storm responses during severe viral infections [2]. In cell-based studies in a human mononuclear cell model of LPS-induced inflammation, Thymalin and its dipeptides reduced IL-1β, IL-6, and TNF-α by 1.4–6-fold, showing a direct capacity to downregulate pro-inflammatory cytokine synthesis [2].
Beyond acute immune modulation, thymalin may reduce oxidative stress, stabilize cyclic nucleotide balance, enhance neutrophil chemotaxis and phagocytosis, and support tissue regeneration [7]. Studies in various pathological models show reduced apoptosis and improved metabolic markers, suggesting that Thymalin helps restore cellular homeostasis and promotes recovery across multiple organ systems [7].
Geroprotective Benefits
Thymalin has been widely investigated for its geroprotective potential. Long-term studies in aging models show promising effects across multiple physiological systems, with potential to preserve cardiovascular, neurological, and metabolic function while reducing chronic, low-grade inflammation which is one of the major contributors to biological aging [4]. It appears to promote greater resilience and functional stability as the body ages, supporting T-cell production, normalizing cytokine activity, and influencing key regulatory pathways involved in immune and endocrine balance [4].
In one study spanning up to 8 years involving 266 older adults, researchers found Thymalin – either alone or combined with a pineal peptide – helped to normalize core physiological functions, including cardiovascular, endocrine, neurological, and metabolic markers [8]. Those receiving peptide therapy experienced a 2–2.4-fold reduction in acute respiratory infections, fewer cardiovascular complications, and improved bone health and had significantly lower mortality [8].
References
1 Khavinson, V. K., Linkova, N. S., Kvetnoy, I. M., Polyakova, V. O., Drobintseva, A. O., Kvetnaia, T. V., et al. (2020) Thymalin: Activation of Differentiation of Human Hematopoietic Stem Cells. Bull. Exp. Biol. Med. 170, 118–122 https://doi.org/10.1007/s10517-020-05016-z
2 Linkova, N., Khavinson, V., Diatlova, A., Petukhov, M., Vladimirova, E., Sukhareva, M., et al. (2023) 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 a respiratory infection. Int. J. Mol. Sci., MDPI AG 24, 13377 https://doi.org/10.3390/ijms241713377
3 Reggiani, P. C., Schwerdt, J. I., Console, G. M., Roggero, E. A., Dardenne, M. and Goya, R. G. (2014) Physiology and therapeutic potential of the thymic peptide thymulin. Curr. Pharm. Des., Curr Pharm Des 20, 4690–4696 https://doi.org/10.2174/1381612820666140130211157
4 Reggiani, P. C., Schwerdt, J. I., Console, G. M., Roggero, E. A., Dardenne, M. and Goya, R. G. (2014) Physiology and therapeutic potential of the thymic peptide thymulin. Curr. Pharm. Des. 20, 4690–4696 https://doi.org/10.2174/1381612820666140130211157
5 Kuznik, B., Khavinson, V., Shapovalov, K., Linkova, N., Lukyanov, S., Smolyakov, Y., et al. (2021) Peptide drug thymalin regulates immune status in severe older patients. Adv. Gerontol., Pleiades Publishing Ltd 11, 368–376 https://doi.org/10.1134/s2079057021040068
6 Khavinson, V. K., Linkova, N. S., Chalisova, N. I. and Ivko, O. M. (2021) The use of thymalin for immunocorrection and molecular aspects of biological activity. Biol. Bull. Rev., Pleiades Publishing Ltd 11, 377–382 https://doi.org/10.1134/s2079086421040046
7 Avolio, F., Martinotti, S., Khavinson, V. K., Esposito, J. E., Giambuzzi, G., Marino, A., et al. (2022) Peptides regulating proliferative activity and inflammatory pathways in the monocyte/macrophage THP-1 cell line. Int. J. Mol. Sci., MDPI AG 23, 3607 https://doi.org/10.3390/ijms23073607
8 Khavinson, V. K. and Morozov, V. G. (2002) Geroprotective effect of thymalin and epithalamin. Adv. Gerontol., Adv Gerontol 10, 74–84
Every lot undergoes five independent assays before release. Results are published in the lot-specific Certificate of Analysis.
Every lot undergoes our 4-panel testing protocol: HPLC purity analysis, ESI-MS identity confirmation, LAL endotoxin screening, and amino acid analysis (for peptides >15 residues). Full analytical data is published in the Certificate of Analysis for each lot.
Lyophilized peptides should be stored at -20°C or below for long-term stability. Once reconstituted, peptides should be stored at 2–8°C and used within a reasonable timeframe depending on the specific compound. Avoid repeated freeze-thaw cycles. Always store in a dry environment away from direct light.
Orders placed before noon PST, Monday–Saturday, ship the same day. We offer free standard shipping on orders over $150. All orders are shipped in insulated packaging with ice packs when necessary. Standard delivery typically takes 2–4 business days within the continental US.
No. All compounds sold by Genesis Peptides are strictly for in vitro and preclinical laboratory research purposes only. They are not approved for human consumption, therapeutic use, or diagnostic purposes. By purchasing, you confirm the products will be used solely for legitimate research applications.
A Certificate of Analysis (COA) is a document issued by our analytical laboratory that reports the results of all quality control tests performed on a specific lot of product. Each COA includes HPLC chromatograms, mass spectra, endotoxin results, and amino acid analysis where applicable. COAs are available in our COA Library for every lot we have shipped.
Yes. We offer volume pricing for universities, research institutions, and laboratories with recurring needs. Discounts begin at 10+ units and scale with volume. Contact our team for a custom quote tailored to your research requirements.
Research Use Only. All findings described above are derived from preclinical studies (animal models and in vitro experiments). Thymalin is not approved by the FDA for any diagnostic or therapeutic use in humans. Genesis Peptides makes no claims regarding human clinical efficacy. This product is sold exclusively for laboratory research.
FOR RESEARCH USE ONLY — Products are sold exclusively for in vitro and preclinical laboratory research. Not for human consumption or administration. Not intended for diagnostic or therapeutic use. These statements have not been evaluated by the FDA.
