The Khavinson bronchial mucosa peptide bioregulator. Formulated with peptide complex A-19 to support healthy bronchial cells and normal respiratory tissue function at the cellular level.*

Support Lung Tissue at the Cellular Level

Walk into any supplement store. Go to the respiratory section. You will find antioxidants, herbs, and vitamins. All of them work around lung tissue.

None of them are a peptide bioregulator.

Peptix A-19 with Taxorest is categorically different. It delivers peptide complex A-19 directly to bronchial mucosa tissue. One active ingredient. One target tissue. That is the Khavinson framework applied to your respiratory system.

✔ Supports healthy bronchial mucosa cells and normal airway tissue function*
✔ Helps maintain normal respiratory tissue protein synthesis*
✔ Formulated with Khavinson peptide complex A-19
✔ Sourced from bronchial mucosa of young animals using patented filtration technology
✔ 40+ years of published research from the St. Petersburg Institute of Bioregulation and Gerontology

🧬 Why Bronchial Tissue Function Changes With Age

As the body ages, the concentration of regulatory peptides in your organs falls. Every organ feels it. Your bronchial mucosa is no different.

Bronchial mucosa cells rely on peptides as signaling molecules. These short-chain amino acid sequences regulate cellular metabolism, protein synthesis, and tissue maintenance in the airway lining. When peptide levels fall, the cells that maintain normal bronchial function become less efficient.

That age-related cellular decline is exactly what most respiratory supplements never address. They support the environment around your cells. Peptix A-19 with Taxorest goes to the source: the bronchial cells themselves.

⚙️ How Taxorest Works — The Cellular Mechanism

Peptix A-19 with Taxorest is a dietary supplement formulated with peptide complex A-19. It is derived from the bronchial mucosa of young calves and pigs using patented filtration technology developed at the St. Petersburg Institute of Bioregulation and Gerontology.

After absorption, the peptides are transported to bronchial tissue via tissue-specific mechanisms. Once there, they act as cellular-level signaling molecules, supporting:

• Healthy activity in bronchial mucosa cells and airway tissue*
• Normal bronchial tissue function and cellular metabolism*
• Normal protein synthesis within bronchial mucosa tissue*
• Normal function within the broader respiratory system*

The mechanism is epigenetic. Based on articles retrieved from PubMed, short peptides bind complementarily to specific nucleotide sequences in DNA strands. That binding reduces the strength of proton bonds in the DNA double helix and stimulates gene transcription and replication. This is how tissue-specific protein synthesis is initiated and maintained at the cellular level. (Khavinson VKh et al. Epigenetic aspects of peptide regulation of aging. Adv Gerontol. 2012;25(1):11-22. PMID: 22708439)

Bryan's Note:

I have spent years going deep on the Khavinson research system. Over 800 peer-reviewed publications. Clinical studies confirmed across 40 years. The St. Petersburg Institute built this science from the ground up starting in the 1970s.

Most people building a Khavinson protocol start with the well-known bioregulators. Taxorest A-19 is one that serious protocol builders add once they understand the respiratory system grouping. If you are building a complete stack, this is the lung piece.

That is not marketing. That is how the framework is structured.

Bryan Rider, Founder, Rebel Peptides

🔬 The Research Behind Peptix A-19 with Taxorest

Peptix A-19 with Taxorest belongs to the Khavinson Peptides system. Organ-specific peptide bioregulators developed at the Saint Petersburg Institute of Bioregulation and Gerontology. Dr. Vladimir Khavinson and his team have published over 800 peer-reviewed studies across more than 40 years of research.

Peptide Theory of Aging — Khavinson, 2002
A landmark review in Neuro Endocrinology Letters established the peptide theory of aging: that aging is driven by changes in gene expression resulting in reduced synthesis of tissue-specific peptides in organs. The proposed correction involves stimulating peptide production or delivering tissue-specific peptides directly. Clinical trials of peptide preparations from multiple organ systems showed improvement in the conditions of respective organs.
Read on PubMed

35 Years of Peptide Bioregulator Research — Khavinson and Anisimov, 2009
A review in Advances in Gerontology summarized 35 years of research on peptide bioregulator mechanisms and clinical efficacy. The molecular model described complementary interaction between short peptides and gene promoter sites as the basis for protein biosynthesis initiation. Research was conducted across laboratories in Russia, the US, the UK, Germany, Italy, Spain, and France.
Read on PubMed

Epigenetic Mechanism — Khavinson et al., 2012
Research in Advances in Gerontology confirmed that short endogenous peptides bind complementarily to specific DNA nucleotide sequences. That binding stimulates gene transcription and replication. This epigenetic mechanism underlies the tissue-specific protein synthesis activity observed across the Khavinson peptide bioregulator system.
Read on PubMed

Alveolar Epithelial Cell Integrity — Simborio et al., 2024
Research published in Cell Communication and Signaling confirmed that impaired DNA damage repair and mitochondrial dysfunction in lung epithelial cells contributes directly to declining lung tissue integrity with age. Maintaining cellular repair capacity in bronchial and alveolar tissue is a key variable in supporting normal respiratory function long term.
Read on PubMed

This is peer-reviewed research. Published. Available on PubMed. The science behind Peptix A-19 with Taxorest is documented, not theoretical.

📖 Research Context — For Educational Reference Only

The following describes the research context in which Khavinson bronchial peptides have been studied. It is provided for educational purposes only. Peptix A-19 with Taxorest is a dietary supplement and is not intended to diagnose, treat, cure, or prevent any disease.

Dr. Khavinson's research into bronchial peptide bioregulators was conducted in the context of age-related respiratory tissue function decline and the effects of environmental exposure on bronchial mucosa cells. The research explored how peptide bioregulator supplementation may support the maintenance of bronchial tissue protein synthesis during aging, as well as in subjects with prior exposure to environmental stressors.

None of this constitutes a basis for claiming that Peptix A-19 with Taxorest treats, reduces, or prevents any respiratory disease or condition. Always consult your doctor before taking this product, especially if you have an existing respiratory health concern or take prescription medication.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

BENEFITS TAB

• Formulated with Khavinson peptide complex A-19 — the bronchial mucosa peptide bioregulator*
• Supports healthy bronchial cells and normal airway tissue function at the cellular level*
• Sourced from bronchial mucosa of young calves and pigs using patented filtration technology
• Supports normal bronchial tissue metabolism and cellular protein synthesis*
• Non-immunogenic formulation — molecular weight under 5 kDa, free from foreign DNA or protein substance
• Available in 60 capsules (30-day supply) and 20 capsules (10-day course)
• Ships from USA warehouse — ready to ship within 2 business days

HOW TO USE TAB

Recommendations for application: Adults 1 to 2 capsules, 1 to 2 times a day during meals.
Course duration: One month (30 days).
Repeat: Every 3 to 6 months.
Contraindications: Individual intolerance to components, pregnancy, lactation. Not for use in individuals under 18. Consult your healthcare provider before starting if you take prescription medication.
Storage conditions: Keep in a dry dark place at temperatures between +2°C (35.6°F) and +25°C (77°F).
Shelf life: 3 years from date of production.

INGREDIENTS TAB

Peptide complex A-19 (extract from bronchial mucosa of calves under 12 months or pigs): 20mg per serving (2 capsules)

Inactive ingredients: microcrystalline cellulose (E460), beet sugar, sugar, lactose, starch.

THE RESPIRATORY SYSTEM STACK

Peptix A-19 with Taxorest is the airway piece of the Khavinson respiratory protocol. It pairs with:

Vladonix A-6 Thymus Peptide Bioregulator — immune system support at the cellular level
Ventfort A-3 Blood Vessel Bioregulator — vascular tissue support

Three organs. Three tissue-specific peptide complexes. One 30-day course. That is how the Khavinson respiratory protocol was originally structured.

See the full Respiratory System Peptide Bundle