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Vladonix

Also known as Vladonix Cytomax, thymus peptide complex capsule, thymus peptide bioregulator

Calf thymus extract capsule from the Khavinson Cytomax line; not the injectable Thymalin, and unstudied.

preclinical Immune & longevity supplement

At a glance

Category
Immune & longevity
Status
supplement
Made from
animal-derived Sold as a peptide complex extracted from the thymus of calves and young cattle. The injectable thymic preparation from the same research programme, Thymalin, is a calf thymus extract 3, and Vladonix is presented as the capsule form of the same tissue. PeptideX has not been able to verify the species, country of origin or age of the source animals for the capsule product itself; no such information reaches the buyer.
Route
oral capsule
Half-life
Not measured. No pharmacokinetic study of this product exists in humans or animals.
Molecular weight
No single value applies. This is a tissue extract rather than a defined molecule - a mixture of free amino acids and short peptides whose composition is neither disclosed nor standardised in any publicly available specification.

Vladonix is a capsule product in the 'Cytomax' range of the Khavinson peptide bioregulator programme - the natural organ-extract half of that programme, as opposed to the 'Cytogen' range of chemically synthesised short peptides, whose thymic members are Thymogen and Vilon. It is sold internationally through online retailers as a food supplement. It is not an approved medicine anywhere in the EU or the US and no regulator has assessed a dossier for it. It is important not to read across from Thymalin: Thymalin is an injectable calf thymus extract that holds a Russian pharmaceutical registration, and it is a different product from this capsule. The Cytomax capsules are widely stated to be registered in Russia as BAD (biologically active food supplements), a notification regime with no efficacy assessment; PeptideX could not open the Russian register from outside Russia to confirm that Vladonix specifically appears in it, so that is recorded here as an unverified claim rather than a fact.

Doping status: Not listed by name on the WADA Prohibited List

Checked against the WADA 2026 Prohibited List. For a specific product and country, Global DRO is the lookup athletes are expected to use — the List names substances, not brand names.

This is bovine tissue swallowed as a capsule, and the sourcing question deserves stating plainly rather than either dismissing or dramatising it. The WHO tables on tissue infectivity in transmissible spongiform encephalopathies place thymus in Table IB, the lower-infectivity category, rather than in the high-infectivity category that covers central nervous tissue; the same document notes that the oral route is a comparatively inefficient route of transmission 5. That is a less alarming starting point than for a brain or pineal extract. What is unanswered is the same as for the rest of the range: a medicine made from bovine material must document the BSE risk status of the country of origin, the age of the animals, the tissue category and batch traceability 6, and none of that is disclosed to someone buying a food supplement online. No case of TSE transmission has been attributed to these capsules, which is not the same thing as having verified the sourcing. Separately, and requiring no risk assessment at all: a reader who is vegetarian or vegan, or who keeps halal or kosher, is being asked to swallow calf thymus.

This is a short entry. There is little or no published research on this compound, so there is correspondingly little to report. Empty dosing or reconstitution sections mean no credible figures exist — not that they were left out.

Mechanism of action

Vladonix belongs to the doctrine of 'peptide bioregulators' from Khavinson's group at the St Petersburg Institute of Bioregulation and Gerontology, which holds that short peptides extracted from an organ selectively restore the function of that same organ by entering cell nuclei and directing gene expression 3. Applied here, a thymus extract is said to restore thymic function and reverse part of the immune decline that accompanies thymic involution with age. The premise of tissue specificity is the least substantiated assumption in the programme: there is no accepted mechanism by which fragments of a few residues, indistinguishable from ordinary proteolytic breakdown material found throughout the body, would navigate selectively to the thymus and bind sequence-specifically to promoter DNA.

Two further objections are specific to this product. It is an extract, so even the identity of the supposed active constituent is unknown and cannot be tested the way a defined molecule can - the same objection that applies to Thymalin. And it is swallowed, so any systemic immunological claim requires the material to survive gastric acid and intestinal peptidases and then be absorbed, none of which has been demonstrated for this product in any published study.

What the research shows

There is no evidence for Vladonix. A PubMed search for the name returns no records and ClinicalTrials.gov returns no registered study, as of July 2026 12. The claims attached to it on retail pages are borrowed from Thymalin, the injectable calf thymus extract, and specifically from the Khavinson and Morozov mortality report of 2003 4. That transfer fails twice over: it is a different product given by a different route, and the study itself will not carry the weight even for Thymalin.

Research in humans

No published human study of Vladonix. No trial, no case series, no pharmacokinetic or tolerability data. The literature on this product by name is empty 12. The study usually cited in its place - 266 people over 60 followed for six to eight years, with reported mortality reductions of 1.6 to 2.1 fold for single preparations and 4.1 fold for Thymalin combined with the pineal extract Epithalamine 4 - used injected extracts, not capsules; the largest effect belonged to a combination and so cannot be attributed to a thymus preparation alone; the randomisation, blinding and attrition cannot be verified; and a 4.1-fold mortality reduction in an elderly cohort exceeds anything medicine has ever achieved. None of that is evidence for this capsule, and it is thin evidence even for the product it was actually generated with.

Animal and lab research

No published animal study of Vladonix by name. Rodent work on thymic preparations from this research tradition used injected extracts and comes almost entirely from the originating group; it is not evidence about this capsule 3.

Caveats. There is nothing to appraise for the product itself. Beyond that: it is an undefined tissue extract with no standardised or disclosed composition, so batches are not guaranteed to be the same substance; the published work in this programme used injection while this is swallowed; and the human claims that circulate alongside it come from a single unreplicated report from one research group in which two preparations were co-administered 4.

What it is used for

  • Sold and self-administered in capsule courses as a general immune-support and anti-ageing supplement, without a validated indication and without a single published study of the product 12
  • Presented by sellers as the natural counterpart of the synthetic thymic peptides Thymogen and Vilon, and as an oral alternative to injected Thymalin; the evidence offered for that framing was generated with those other substances by injection 34

Dosing

  • No dose is given here, because none has been studied. There is no published human study of this product, no dose-finding work, no maximum tolerated dose, no pharmacokinetics and no dose-response curve 12.
  • Capsule course schedules circulate on retail pages. They are packaging conventions rather than findings; the protocol section below records the common one explicitly as a vendor convention with no published basis, not as a validated dose.
  • The Thymalin dose - 5 to 20 mg per day intramuscularly in the Russian product information, 10 mg per day in the geroprotection protocol 4 - is not a dose for this capsule. Different product, different route, and in an extract a milligram figure is a mass of powder rather than a quantity of active substance.

These figures describe what the literature and published protocols report. They are not advice and not a dosing instruction.

Protocols

Vendor capsule course (packaging convention, no published basis)

user protocol — not validated

Source: Retailer instructions and Khavinson-programme course conventions

This is not a validated schedule. It is a pattern that circulates among users and sellers, reproduced because it is what people actually follow — not because it has been tested. No trial established these doses, this interval or this duration, and nobody is checking what is in the vial. Treat every number below as an assertion, not a finding.

A courseone to two capsules a day for 10 to 30 days, the length set by the pack size
Repeattypically two or three courses a year, with sellers suggesting more frequent repeats from around age 40

This is a packaging convention, not a dose. The 10- to 30-day length is set by the number of capsules in the pack, and the 'two or three courses a year' cadence comes from the sellers' own promotional guidance rather than from any study of this product 12. Because the capsule contains an undefined tissue extract, a figure given in capsules or milligrams describes a mass of powder rather than a quantity of any identified active substance, and no published human study establishes that any of it is absorbed or does anything.

Schedules are reproduced as their source states them. Units, IU and milligrams explains why the figures are not interchangeable between products.

Reconstitution

Supplied as capsules taken by mouth. Nothing is reconstituted and no injection is involved.

Safety

Side effects

  • Unknown. No systematic safety monitoring of this product has been published 12; an absence of reported adverse effects reflects the absence of any study rather than evidence of safety
  • Allergic reaction to foreign animal protein is the predictable class risk for any animal tissue extract, though the oral route makes systemic sensitisation less likely than injection would
  • No toxicology, carcinogenicity or reproductive toxicity programme for this product exists in the internationally accessible literature
  • The identity and purity of the contents of a capsule bought online cannot be verified by the buyer, and no independent analysis has been published

Do not use if

  • Autoimmune disease - a product sold specifically to stimulate immune function has never been tested in people whose immune system is already attacking them
  • Immunosuppression after organ transplantation
  • Lymphoproliferative disorders - no safety data
  • Pregnancy and breastfeeding - no data of any kind
  • Children and adolescents - no data; effects of a thymic tissue extract during immune development have never been examined
  • Known hypersensitivity to bovine protein
  • Anyone avoiding animal-derived material on dietary or religious grounds - this is calf thymus 5

Interactions

Not studied. No interaction study of any kind exists for this product 12. Opposition to immunosuppressant treatment is plausible on the claimed mechanism but has never been demonstrated, and with an extract whose active constituents are unidentified such a study would be difficult to design.

Sources