TL;DR: Khavinson’s bioregulators are very short peptides (2-4 amino acids) that, in Russian research, are proposed as regulators of tissue-specific gene expression. The three stars of the cluster are Timalina (thymus/immunity), Pinealon (brain bioregulator, EDR tripeptide) and Epitalon (pineal gland, telomeres). The classic anti-aging protocol combines Epitalon + Timalina; the sleep and longevity stack adds Pinealon + Epitalon. Honesty first: almost all of the evidence comes from a single research group in St. Petersburg, with little independent Western replication.
What a “bioregulator” is (and why they are so short)
The idea of bioregulator peptides was born in the 1970s and 80s with Vladimir Khavinson and Vyacheslav Morozov in what was then the Soviet Union. The central hypothesis: each tissue produces short peptides that act as “switches” for its own genetic program. By introducing the right peptide, the protein synthesis of that specific tissue would be restored without touching the DNA sequence, that is, an epigenetic-type effect.
That is why these molecules are tiny compared with peptides like CJC-1295 or retatrutide. A typical bioregulator has only 2 to 4 amino acids, small enough to penetrate the cell and, according to the group’s studies, bind to specific regions of DNA.
In German you will find the same concept under the term Bioregulator-Peptide; in Spanish you will see them as biorreguladores or peptidos bioreguladores. If you want the full map of the family, we have a general guide to Khavinson’s bioregulators.
Timalina: the thymus bioregulator
Timalina (Thymalin) was one of the first peptides in the group and one of the few registered as a drug in Russia. Originally it is a peptide complex extracted from the thymus of young calves; research interest centers on the thymus because it involutes with age, which is associated with a decline in immunity (“immunosenescence”).
In the Khavinson group’s models, Timalina was studied as a modulator of thymic function and T-cell count. It is the “immune” piece of the cluster and the one that appears alongside Epitalon in the most-cited mortality study. You can see the molecule’s page at Timalina 10mg.
Pinealon: the brain bioregulator (EDR)
Pinealon is a tripeptide, Glu-Asp-Arg (abbreviated EDR), presented as a brain bioregulator. The research published by the group has focused on neuroprotection against hypoxia and oxidative stress.
In cerebellar granule cell cultures and in animal models, Pinealon has been reported to reduce reactive oxygen species (ROS), modulate antioxidant enzymes such as SOD2 and GPX1, and decrease caspase-3 activity (a marker of apoptosis) in brain tissue under ischemic stress conditions. In rodents subjected to hypoxia or aging, the treated animals performed better on learning and memory tasks than the controls.
Compound page: Pinealon 20mg.
Epitalon: the pineal and telomere piece
Epitalon (or Epithalon) is the tetrapeptide Ala-Glu-Asp-Gly (AEDG), a synthetic analog of epithalamin extracted from the pineal gland. It is the bioregulator with the strongest individual evidence base and the most famous of the cluster thanks to a striking mechanism: the activation of telomerase, the enzyme that maintains telomere length.
In human fibroblast cultures, telomere elongation via increased telomerase activity has been described, and in 2025 an independent replication published in Biogerontology again observed increased telomere length in human cell lines. In animal models, epithalamin/Epitalon was associated with a 12-24% increase in median life expectancy. We go deeper into its biology in what is Epitalon, and the page is at Epitalon 10mg.
The two classic protocols
Epitalon + Timalina (the anti-aging protocol)
This is the combination from the landmark 2003 study: pineal (Epitalon/epithalamin) + thymus (Timalina). The logic is to target two axes of aging at once, the neuroendocrine and the immune.
Relative reduction versus the control group in 266 elderly subjects. Prospective cohort study, not randomized.
Practical reading of the chart: administering epithalamin reduced 6-year mortality by 1.6 to 1.8 times; adding Timalina brought it to 2.5 times; and repeating the combination yearly, up to 4.1 times. It is a strong result, but it is worth remembering that it was a prospective cohort study, not a randomized trial, and it was never replicated to Western standards.
Pinealon + Epitalon (the sleep and longevity stack)
The second popular combination unites the brain bioregulator (Pinealon) with the pineal one (Epitalon). The research idea is synergistic: Epitalon is associated with the regulation of melatonin and the circadian rhythm, while Pinealon provides the daytime neuroprotective angle. In the community it is used as a stack oriented toward sleep and “cognitive longevity”.
To convert vial milligrams into reconstitution volume without doing the math by hand, use the peptide calculator. All of this is for research reference purposes only.
The honest part: a single school
The elephant in the room: Khavinson’s body of work exceeds 700 publications over four decades, but most of it is Russian, methodologically heterogeneous, and without broad independent replication. The recent exception is Epitalon’s telomere signal, confirmed in 2025 by an outside group. Treat the rest as interesting hypotheses, not as established facts.
Frequently asked questions
What makes a bioregulator different from a normal peptide?
Size and premise. Bioregulators are ultra-short peptides (2-4 amino acids) proposed to regulate the gene expression of a specific tissue, rather than mimicking a hormone or binding to a surface receptor as larger peptides do.
Are Timalina and Thymosin the same?
Not exactly. Timalina is a thymic peptide complex from the Khavinson program; thymosin alpha-1 is a different thymic peptide, synthetic and with a defined sequence. Both are researched for their relationship to thymic immunity, but they are different molecules.
Why are Pinealon and Epitalon combined?
Because they cover complementary axes in aging research: Epitalon is studied for telomerase and melatonin/circadian rhythm, and Pinealon as a neuroprotective brain bioregulator. Together they form the classic sleep and longevity stack.
How solid is the evidence for these bioregulators?
Uneven. Epitalon has the best base (including an independent 2025 telomere replication). Timalina and Pinealon depend almost entirely on data from a single Russian group, with small samples and no Western randomized trials.
Who is Khavinson?
Vladimir Khavinson was a Russian gerontologist who directed the Institute of Bioregulation and Gerontology in St. Petersburg and developed most of these bioregulator peptides starting in the 1970s.
References
- Khavinson VKh, Morozov VG. Peptides of pineal gland and thymus prolong human life. Neuroendocrinology Letters. 2003;24(3-4):233-240. (PMID: 14523363)
- Khavinson VKh. Peptides and Ageing. Neuroendocrinology Letters. 2002;23(Suppl 3):11-144.
- Ashapkin V, Khavinson V, Shilovsky G, et al. EDR Peptide: possible mechanism of gene expression and protein synthesis regulation involved in the pathogenesis of Alzheimer’s disease. Published in the MDPI open-access journal, 2020 (PMC7795577).
- Anisimov VN, Khavinson VKh, et al. Effect of Epitalon on biomarkers of aging, life span and spontaneous tumour incidence in female Swiss-derived SHR mice. Biogerontology. 2003;4(4):193-202.
- Independent replication study: Epitalon increases telomere length in human cell lines through telomerase upregulation or ALT activity. Biogerontology. 2025.
- Wikipedia contributors. Epitalon. Wikipedia, accessed 2026 (summary of the AEDG sequence and research context).
Content for research reference and educational purposes only; it is not an approved medication, does not constitute medical advice, and is not intended for human consumption.