IMMUNE · Injectable
NK Peptide.
Natural killer cell bioregulator — immune surveillance
How it works
Class & mechanism.
In short
NK Peptide is a short Russian bioregulator peptide, derived from natural killer cell extracts within the Khavinson cytomedicine tradition, whose exact sequence has not been independently confirmed in Western literature. It is proposed to signal NK cells to proliferate and increase cytotoxic activity, supporting innate immune surveillance. It is studied mainly as a theoretical aid for age-related immune decline, with the thinnest published evidence base of the Khavinson organotropic peptide family.
Class
Immune Peptide Bioregulator (Khavinson cytomedicine)
Mechanism
NK Peptide refers to a short oligopeptide (likely 2–4 amino acids) from the Khavinson cytomedicine system, derived from natural killer (NK) cell extracts. Proposed to act as an endogenous bioregulatory signal that may enhance NK cell proliferation and cytotoxic activity through lymphokine-like signalling. Part of the organotropic peptide family alongside Bronchogen, Cardiogen, and Prostamax. Exact amino acid sequence not confirmed in accessible English literature; some sources suggest a dipeptide (Glu-Asp) or a Lys-Glu-based tetrapeptide similar to Vilon. Research primarily published in Russian journals with limited independent Western replication.
Personalized Peptides provides DNA-driven peptide recommendations — we are not a compounding pharmacy, peptide synthesis company, or clinical provider.
Did you know
NK Peptide may be the least understood peptide in the entire catalog — its exact sequence isn't even publicly confirmed in English. It comes from the same Russian bioregulation school that produced Epithalon, but unlike Epithalon (which has dozens of published studies), NK Peptide has barely a handful. The limited data that exists suggests it may measurably increase natural killer cell counts.
Preclinical Data
No human PK studies available.
Minimal published data — research-stage immunomodulator. No formal PK.
Class
Natural killer cell activating peptide / immunomodulator
Route
SC / IM
Mol. Weight
1,200 Da
What we don't know
Essentially no PK data exists. Molecular weight (~1,200 Da) and proposed SC administration suggest standard small peptide kinetics. All PK parameters are unknown. The therapeutic rationale is based on immunomodulatory hypothesis rather than established pharmacology.
Why this dosing protocol
Research protocols use 1-5mg SC 2-3×/week, based on NK cell activation time course rather than PK-guided dosing. The low dosing frequency relative to expected rapid clearance (for a ~1.2 kDa unprotected peptide) suggests a signalling cascade mechanism where biological effect outlasts plasma presence.
Empirical protocol: 1-5mg SC 2-3×/week
Safety notes
- Minimal published data
- Mechanism not well-characterised
Pharmacokinetic data shown for educational context. All parameters are inferred or empirically derived — no formal human PK studies exist for this compound. Individual response varies. Not a substitute for clinical dosing guidance.
Benefits
What it does.
NK cell activity enhancement — proposed to help stimulate natural killer cell proliferation and cytotoxic function for immune surveillance
Immune restoration — used in Russian gerontology as a proposed aid to counter age-related decline in NK cell numbers and activity
Anti-viral immune support — theoretical enhancement of innate immune response to viral pathogens via the NK cell pathway
The science
Peer-reviewed findings.
Research supporting this compound's mechanisms and safety profile.
What this does not mean
NK Peptide is a research chemical. The information on this page is educational and does not constitute medical advice, diagnosis, or treatment. NK Peptide is not FDA-approved for enhancing immune function, treating viral infections, supporting cancer surveillance, or any other use. This page does not recommend, endorse, or prescribe any compound for human use. Always consult a qualified healthcare provider before making health decisions. Personalized Peptides provides DNA-driven educational context and test interpretation — not clinical protocols or pharmaceutical recommendations.
Khavinson group publications report NK cell count and activity improvements in ageing models with peptide bioregulator administration; effects observed in Russian geriatric clinical settings
SOURCE · Khavinson VKh et al. (2013), Bulletin of Experimental Biology and Medicine — NK-related peptide bioregulation in ageing models
Protocol
How to use it.
Dosing
5–10 mg subcutaneous injection daily × 10–20 day course, 2–3 courses per year. Part of the "complete Khavinson protocol" alongside other organotropic peptides.
Cycle
10–20 day pulse, repeated 2–3× per year. Standard Khavinson rotation: multiple organotropic peptides pulsed sequentially.
Contraindications
When to skip it.
Least characterized of all Khavinson cytomedicines. No published PK data in English. Exact active peptide sequence not publicly confirmed. No Western regulatory approval. Autoimmune caution — theoretical risk of exacerbating autoimmune conditions through NK activation.
Always cleared with your concierge before protocol start.
Regulatory Context
FDA compounding status.
| FDA Status | Risk Level | Compounding | Key Date |
|---|---|---|---|
| No specific FDA action | 🟢 Stable | Gray zone — no specific enforcement | No pending dates |
Natural Killer cell bioregulator — Khavinson cytomedicine class. Not on any FDA Category 1/2/3 lists. No pending PCAC review.
Source: FDA Federal Register, PCAC agendas, industry analyses. Educational context only — not legal advice. Review after July 23-24, 2026 PCAC meeting.
Pricing
What it costs.
Indicative range for NK Peptide, sourced from vetted US and EU dispensing suppliers. Concierge confirms the exact figure once your match is locked.
Indicative range (USD)
Sourced through vetted dispensing partners in the United States and European Union. Concierge confirms the exact figure once your match is locked.
- 0199% purity verified, third-party tested
- 02Includes vial and reconstitution guidance
- 03Concierge supplier match included with every protocol
See NK Peptide pricing — and your supplier match.
Pricing is unlocked once we know who you are. Take the 3-minute quiz and we'll match you to a US or EU dispensary based on your location and protocol fit.
- Live USD price range
- US & EU supplier shortlist
- Concierge sign-off on dosing
Indicative price range: $112–$168 USD