Peptide Comparison
ThymalinvsVilon
Russian thymic peptide complex that rejuvenates immune function and supports healthy aging
Immunomodulatory dipeptide bioregulator (Lys-Glu) that upregulates SIRT1 expression 6-fold through direct DNA promoter binding, activates T-cell differentiation via sphingomyelin signaling, and reduces pro-inflammatory cytokines by up to 6-fold as a natural inducer of TNF tolerance
At a Glance
Quick
comparison
Dose Range
Thymalin
5–10 mg
Vilon
500–500 mcg
Frequency
Thymalin
Once daily
Vilon
Once daily
Administration
Thymalin
Intramuscular injection
Vilon
Subcutaneous injection
Cycle Length
Thymalin
4-6 weeks
Vilon
12+ weeks
Onset Speed
Thymalin
Moderate (1-2 weeks)
Vilon
Gradual (3-4 weeks)
Evidence Level
Thymalin
Limited human trials
Vilon
Limited human trials
Efficacy
Benefit
ratings
Immune Restoration
Longevity Support
Disease Prevention
Immune System Revival
Healthy Aging
Digestive Support
Technical Data
Compound
specifications
Thymalin
Molecular Formula
Complex mixture; active dipeptide EW: C16H19N3O5
Molecular Weight
Polypeptide complex; components 250-1000 Da; active dipeptide EW ~321 Da
Half-Life
Not precisely characterized for complex; immune effects persist weeks post-administration
Bioavailability
High via intramuscular or subcutaneous injection
CAS Number
63958-90-7
Vilon
Molecular Formula
C11H21N3O5
Molecular Weight
275.3 g/mol
Half-Life
Short plasma half-life typical of dipeptides (minutes); biological effects persist for weeks to months through epigenetic modifications to SIRT1/PARP gene expression; metabolized to constituent amino acids
Bioavailability
Absorbed via intestinal peptide transporters (PepT1) when administered orally (demonstrated in animal studies); rapid absorption from subcutaneous injection sites; efficient cellular uptake and nuclear penetration due to ultra-short dipeptide structure
CAS Number
45234-02-4
Protocols
Dosing
tiers
Thymalin
Vilon
Applications
Best
suited for
Thymalin
Aging Adults Seeking Immune Support
Thymalin is especially valuable for people over 55 whose thymus gland has naturally shrunk with age. By stimulating thymic function, it helps restore the immune training center that your body relies on to fight infections and stay healthy.
Longevity and Anti-Aging Protocols
Clinical studies tracking patients for 6-8 years showed Thymalin reduced mortality by 2.0-2.1-fold. Combined with Epitalon, the mortality reduction reached an impressive 4.1-fold, making this combination one of the most studied longevity peptide protocols.
Seasonal Illness Prevention
Research shows Thymalin cuts respiratory infection rates by 2.0-2.4-fold. A short 10-day course before cold and flu season can significantly boost your immune defenses for months afterward.
Vilon
Immune system restoration in aging individuals with declining thymic function
Vilon is particularly well-suited for individuals focused on immune system restoration in aging individuals with declining thymic function. Research and clinical experience suggest meaningful benefits in this area when used as part of a comprehensive treatment approach.
Adjunctive immunomodulatory support during cancer treatment protocols
Vilon is particularly well-suited for individuals focused on adjunctive immunomodulatory support during cancer treatment protocols. Research and clinical experience suggest meaningful benefits in this area when used as part of a comprehensive treatment approach.
Geroprotective therapy targeting SIRT1/PARP pathways for cellular longevity
Vilon is particularly well-suited for individuals focused on geroprotective therapy targeting sirt1/parp pathways for cellular longevity. Research and clinical experience suggest meaningful benefits in this area when used as part of a comprehensive treatment approach.
Comprehensive Khavinson bioregulator protocols for anti-aging and immune support
Vilon is particularly well-suited for individuals focused on comprehensive khavinson bioregulator protocols for anti-aging and immune support. Research and clinical experience suggest meaningful benefits in this area when used as part of a comprehensive treatment approach.
Safety Profile
Side
effects
Thymalin
Common
- No side effects in most patients
- Mild injection site reaction
Uncommon
- Transient low-grade fever
- Mild flu-like symptoms
- Temporary headache
Serious
- Severe allergic reaction
Vilon
Common
- Injection site reaction
- Mild fatigue
- Mild headache
- Digestive changes
Uncommon
- Flu-like symptoms
Serious
- No documented serious adverse effects
Research Status
Safety
& evidence
Thymalin
Evidence Level
Limited human trials
FDA Status
Research compound
Safety Overview
Thymalin has an excellent safety profile based on over 40 years of clinical use in Russia. Most patients experience zero side effects, and the peptide complex has been described as 'practically non-toxic' in research literature. It has been used safely in thousands of patients, including elderly populations over extended periods.
Contraindications
- xActive thymic tumors or malignancies
- xKnown hypersensitivity to animal-derived peptide products
- xPregnancy and breastfeeding (insufficient safety data)
- xSevere uncontrolled autoimmune disease without medical supervision
Vilon
Evidence Level
Limited human trials
FDA Status
Research compound
Safety Overview
Vilon (immunomodulatory thymic peptide complex from bovine thymus) demonstrates favorable safety in Russian/Eastern European medical use over 20+ years with minimal documented serious adverse events in published literature. Bovine-derived peptide preparations carry theoretical prion disease risk (variant Creutzfeldt-Jakob disease) though processing methods and regulatory standards substantially reduce this risk. Common adverse effects are mild—local injection site reactions, transient fever, or lymphadenopathy—consistent with immune system stimulation rather than toxicity.
Contraindications
- xKnown hypersensitivity to peptide bioregulators or constituent amino acids (lysine, glutamic acid)
- xPregnancy and breastfeeding — insufficient reproductive safety data
- xActive autoimmune disease in flare without medical supervision
- xOrgan transplant recipients on immunosuppression — potential interference with immunosuppressive regimens
Decision Guide
Which is
right for you?
Choose Thymalin if...
- Immune system restoration in aging adults
- Longevity and healthy aging support
- Reducing infection frequency and severity
- Multi-system health optimization
Choose Vilon if...
- Immune system restoration in aging individuals with declining thymic function
- Adjunctive immunomodulatory support during cancer treatment protocols
- Geroprotective therapy targeting SIRT1/PARP pathways for cellular longevity
- Comprehensive Khavinson bioregulator protocols for anti-aging and immune support