CalcMyPeptide
Khavinson BioregulatorAlso known as: Thymus Extract Bioregulator, Thymic Cytomax

Vladonix

Vladonix is the most critical immunological bioregulator in the Cytomax protocol. Derived from pure, youthful thymus tissue—the absolute master organ of immunity—it serves as the natural, full-spectrum twin to Vilon. It is utilized fundamentally in longevity circles to violently reverse thymic involution (the aging-associated shrinking of the thymus), restoring a fiercely aggressive, youthful immune surveillance system capable of eradicating severe pathogens and mutated cells.

Reviewed by CalcMyPeptide Editorial Team
Last updated: April 2026Evidence: Low1 peer-reviewed citation

Quick Stats

Half-LifeMixture (variable)
Dose Range1-2 capsules/day
Frequency1-2× daily for 10-30 day cycles
Vial SizesN/A (oral)
BioavailabilityOral capsules
Year Developed1980s

Scientific Data

Molecular Formula
Polypeptide extract (Thymus tissue <10 kDa)
Molecular Weight
Mixture (<10 kDa)
PubChem ID

Mechanism of Action

Vladonix (A-6) is a Cytomax natural polypeptide extract from the thymus gland of young calves — often called the single most important immune bioregulator in the Khavinson A-Series. The thymus is the primary training ground for T-lymphocytes: naïve T-cells migrate from bone marrow to the thymus, where they undergo positive and negative selection to emerge as competent, self-tolerant CD4+ helper and CD8+ cytotoxic T-cells. Thymic involution begins as early as age 1 and is 70–90% complete by age 45 — a catastrophic loss of adaptive immune capacity that underlies much of what we call "immune aging" (immunosenescence).

Vladonix delivers short peptide signals (<10 kDa) from bovine thymic tissue. These peptides enter thymic stromal cell (epithelial cell, dendritic cell) and thymocyte nuclei to reactivate transcription of: FOXN1 (the master transcription factor for thymic epithelial cell identity and thymopoiesis), thymosin α1 and β4 (thymic hormones that guide T-cell differentiation), MHC class I and II molecules (enabling T-cell education), and IL-7 and IL-15 (cytokines maintaining T-cell memory and naïve T-cell survival). Together, these actions work to reverse thymic involution and restore adaptive immune capacity.

In Khavinson's research, thymic peptide bioregulators demonstrated some of the most striking longevity data — animals treated with thymic extracts showed enhanced immune surveillance, reduced cancer incidence, and extended median lifespan. Vladonix is paired with Endoluten (A-8, pineal) in what many practitioners call the "longevity core stack" — Endoluten restores the circadian master clock, while Vladonix rebuilds the immune system's aging surveillance capacity. Together, they address the two most Khavinson considers dominant determinants of biological age.

Source: PMID: 12677266

Background & History

Vladonix is the thymic Cytomax extract — natural counterpart to synthetic Vilon.

Research Use Cases

  • Immune restoration
  • Thymic involution reversal support
  • Post-infection immune recovery

Dosing Protocol

Typical Dose1-2 capsules/day
Frequency1-2× daily for 10-30 day cycles
Half-Life~30 minutes (estimated)

Dosing Protocols

Mini-Course / General Preventive (1 box)

Dose
2 capsules (20 mg)
Frequency
Once daily for 10 days, 30 min before meals
Note: Standard Khavinson mini-course (20 caps). Repeat every 6 months. Combine with Endoluten (A-8) for the foundational longevity immunity stack.

Full Monthly Course (Immune Restoration)

Dose
2 capsules (20 mg)
Frequency
Twice daily for 30 days (120 caps = 2× 60-cap boxes)
Note: Bi-annual 30-day courses for adults with clear immune decline, frequent infections, or post-illness immune rebuilding. Core longevity immune stack: Vladonix (A-6) + Endoluten (A-8) + Bonomarlot (A-20) for thymic-pineal-hematopoietic system restoration.

Intensive / Immune Senescence Reversal Protocol

Dose
2 capsules (20 mg)
Frequency
Twice daily, repeated monthly
Note: Post-chemotherapy immune recovery, severe immunosenescence, or chronic immunosuppression (non-pharmaceutical). Physician supervision required for any immunocompromised state. Max: 4 caps/day (40 mg).

Administration

Route
Oral capsules (20-cap and 60-cap boxes)
Timing
30 minutes before meals. Morning + evening for intensive courses.
Fasting Required?
Yes — inject on an empty stomach

Expected Timeline

Days 1—14
Thymic epithelial cell gene expression restoration initiated. Immune response time and severity improvements may begin.
Month 1–3
Improved T-cell repertoire diversity. Reduced frequency and severity of infections, particularly viral.
Month 3–6
Sustained thymopoiesis support. CD4:CD8 T-cell ratio normalization. Improved immune surveillance of senescent and abnormal cells.

Who Is It For?

Immunosenescence / Longevity (Ages 40+)

Low

Restores thymic stromal FOXN1 and thymosin gene expression — targeting the root cause of age-related immune decline. Foundation of the Khavinson longevity immunity protocol.

Post-Illness / Post-Viral Immune Rebuilding

Low

Used in post-COVID, post-chemotherapy, and post-severe-infection protocols. Re-establishes adaptive immune capacity after depletion events.

Safety & Considerations

Natural glandular extract (Cytomax) from bovine thymus tissue, <10 kDa. No hormones. Meets European/Russian veterinary standards. Generally recognized as safe.

Regulatory & Legal Status

FDA Status (US)
Research Only
WADA Status (2026)
Not Listed

Not currently on the WADA 2026 Prohibited List. Policies may change — verify before competition.

Classification

Research Chemical

US Compounding: Not eligible / not available

⚠️ This information is for educational purposes only and may not reflect the most current regulatory updates. Always verify with official FDA, WADA, and jurisdiction-specific sources before use.

Interactions & Contraindications

Standard Cytomax capsule protocol.

Synergies & Common Stacks

Vladonix (Cytomax extract) + Vilon (synthetic dipeptide) = layered thymic immune support.

Dosing Quick Reference

Vladonix— Dosing Guide
Dose Range
1-2 capsules/day
Half-Life
~30 minutes (estimated)
Frequency
1-2× daily for 10-30 day cycles
Route
Oral
Khavinson Bioregulatorcalcmypeptide.com

Frequently Asked Questions

Why is Vladonix so important for longevity?
Thymic involution — the progressive shrinking of the thymus — is one of the most dramatic aging changes in the body, with 70–90% of thymic tissue lost by age 45. This collapses adaptive immune capacity, reducing the body's ability to fight infections, detect cancer cells, and maintain immune tolerance. Vladonix targets the FOXN1 gene, the master regulator of thymic epithelial cell identity, to reverse this involution.
What is the Vladonix + Endoluten stack?
Khavinson considers Vladonix (A-6, thymic/immune) and Endoluten (A-8, pineal/circadian) as the two most critical longevity bioregulators. Endoluten resets the master circadian clock and melatonin production; Vladonix restores adaptive immune capacity. Together they address the two most fundamental drivers of biological aging: circadian dysregulation and immune senescence.

References

  1. Khavinson VKh "Peptide bioregulators — a new class of geroprotectors".” Bulletin of Experimental Biology and Medicine (2002). PMID: 12677266

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Recommended SourceOral Bioregulator

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