Reviewed Mar 2026 | PubMed sources
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Epithalon vs Thymalin: Head-to-Head Comparison

Both are Russian-developed peptides studied for anti-aging. Epithalon (Epitalon) is a tetrapeptide that activates telomerase and is derived from epithalamin (pineal extract). Thymalin is a thymus-derived peptide that modulates immune function. Both were developed by Prof. Vladimir Khavinson.

Side-by-Side Comparison

DimensionEpithalonThymalin
Evidence LevelRussian clinical studies; Khavinson's telomerase researchRussian clinical studies; decades of use in Russia
FDA StatusNot approved in US/EUNot approved in US/EU; used clinically in Russia
MechanismTelomerase activation, pineal gland melatonin regulationThymic immune modulation, T-cell maturation support
Primary UseAnti-aging, telomere lengthening, circadian rhythmImmune restoration, particularly in aging or immunocompromised
Side EffectsMinimal reportedMinimal reported
Anti-Aging MechanismTelomere maintenance (cellular aging)Immune system rejuvenation (immunosenescence)
Evidence Level
Epithalon
Russian clinical studies; Khavinson's telomerase research
Thymalin
Russian clinical studies; decades of use in Russia
FDA Status
Epithalon
Not approved in US/EU
Thymalin
Not approved in US/EU; used clinically in Russia
Mechanism
Epithalon
Telomerase activation, pineal gland melatonin regulation
Thymalin
Thymic immune modulation, T-cell maturation support
Primary Use
Epithalon
Anti-aging, telomere lengthening, circadian rhythm
Thymalin
Immune restoration, particularly in aging or immunocompromised
Side Effects
Epithalon
Minimal reported
Thymalin
Minimal reported
Anti-Aging Mechanism
Epithalon
Telomere maintenance (cellular aging)
Thymalin
Immune system rejuvenation (immunosenescence)

Peptide Overviews

Epithalon (Epitalon)

CPreclinical

Epithalon (also spelled Epitalon or Epitalone) is a synthetic tetrapeptide based on the natural peptide epithalamin, produced by the pineal gland. Research by Vladimir Khavinson suggests it may activate telomerase and extend cellular lifespan.

Anti-Aging & LongevityNot Approved
View full Epithalon (Epitalon) profile →

Thymalin

CPreclinical

Thymalin is a synthetic dipeptide (glutamyl-tryptophan) originally derived from calf thymus extract. Developed by Vladimir Khavinson in Russia, it is used there for immune modulation.

Immune SupportNot Approved
View full Thymalin profile →

Supplies for Both

Common research handling and preparation supplies for injectable peptide workflows.

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Recommended Reading

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Epithalon vs Thymalin: FAQ