What the published literature does — and does not — support

Selection criteria

Each component was assessed against four criteria before inclusion:

1. Published mechanistic relevance. Peer-reviewed evidence of antiviral, immunomodulatory, antioxidant, or host-defense activity relevant to influenza biology or host response.
2. Feed-delivery suitability. Plausibility of oral administration through a feed matrix, ideally with published poultry feeding work.
3. Mechanistic complementarity. Contribution to a different stage of exposure or host response than the other components, rather than duplication.
4. Commercial feasibility. Availability of a sourceable, standardizable ingredient that can be specified and quality-controlled at commercial scale.

Component rationale

Lablab bean powder (Lablab purpureus)

Lablab contains FRIL, a lectin protein that has been studied for broad-spectrum anti-influenza activity through interference with viral attachment [7]. Interference at the attachment stage is mechanistically distinct from the immune and antioxidant pathways addressed by the other components, which is the basis for its inclusion. Whether a feed-delivered preparation retains functionally relevant lectin activity after processing is an open question for this formulation.

Green tea catechins (Camellia sinensis)

Catechins including EGCG and ECG have documented anti-influenza activity, and green-tea-derived by-product material has been evaluated in chickens through feed administration with influenza-related biological outcomes reported [6]. This is the most directly relevant published precedent for our delivery model: a plant-derived material, administered in feed, evaluated against influenza-related endpoints in the target species.

Garlic extract (Allium sativum)

Garlic contains organosulfur compounds including allicin, described in the literature in connection with antiviral and immunomodulatory activity [1, 10]. Allicin is also structurally unstable under heat, mechanical stress, moisture, and oxidation, which makes it a formulation problem as much as a biological one.

Ginger extract (Zingiber officinale)

Ginger contains gingerols and shogaols described in connection with antioxidant activity and modulation of inflammatory response [1, 10]. Its intended contribution concerns the host's inflammatory and oxidative response rather than direct interference with the virus.

Feed delivery as an established platform

Phytogenic feed additives are a mature category in poultry nutrition, with a substantial literature on their formulation, delivery, and effects on performance and nutrient digestibility [2, 3, 4, 5]. Published work has also compared powdered and encapsulated delivery of phytogenic additives in broilers [5], which is directly relevant to carrier and stability decisions.

That literature has been directed overwhelmingly at production-oriented outcomes — gut health, feed conversion, growth performance, egg production — and at broad, non-specific immune support [4]. Applying the same delivery platform to a disease-resilience design objective is the point of departure for this program.

Why the target is a moving one

Genomic analysis of circulating H5N1 clade 2.3.4.4b viruses has identified mutations associated with mammalian adaptation, receptor binding, and replication in mammalian cells, and the authors of that work call specifically for multi-target antiviral strategies [11]. A multi-component design engaging several stages of exposure and host response is a response to that recommendation, though whether multi-targeting produces additive or interfering effects in a single feed matrix is untested.

Federal context

Two federal positions define the intervention space. USDA's Agricultural Research Service has stated that HPAI vaccination is not currently used in U.S. commercial poultry because of trade implications [14]. Federal regulation prohibits extra-label use of adamantanes and neuraminidase inhibitors in chickens, turkeys, and ducks [13], and USDA APHIS states that there is no treatment for HPAI [15].

Through the HPAI Poultry Innovation Grand Challenge, USDA APHIS has directed funding toward non-vaccine approaches, including nutrition-based flock resilience, feed-delivered antivirals, and bean-derived antiviral activity [16, 17]. Federal One Health research priorities identify reduction of viral burden in animal reservoirs as a stated objective [18].

Open scientific questions

These are the questions our validation sequence is designed to answer. They are stated as questions because they are unresolved:

• At what inclusion rates does each component remain functionally active in a complete feed matrix without degrading palatability, feed quality, or nutrient digestibility?
• What proportion of each marker compound survives grinding, mixing, pelleting, moisture exposure, and commercial storage intervals, and which carrier systems best preserve it?
• Do the four components interact additively, neutrally, or antagonistically when combined in one standardized formulation?
• Does the combined formulation produce measurable, reproducible changes in safety, tolerance, immune-response, and antioxidant-response endpoints in poultry?
• Do any such changes translate into disease-relevant outcomes under controlled evaluation conducted in appropriately qualified facilities?
• What analytical marker methods and quality specifications are required for reproducible commercial manufacture?

References

1. Yasmin, A.R., et al. (2020). Herbal Extracts as Antiviral Agents. In: Feed Additives. Elsevier, Chapter 7, pp. 115–132.
2. Nipuna, W., et al. (2025). Role of feed additives in poultry nutrition: historical, current and future perspectives. Animal Feed Science and Technology, 326, 116371.
3. Wang, J., et al. (2024). Phytogenic feed additives as natural antibiotic alternatives in animal health and production: a review of the literature of the last decade. Animal Nutrition, 17, 244–264.
4. Abdelli, N., et al. (2021). Phytogenic feed additives in poultry: achievements, prospective and challenges. Animals, 11.
5. Hafeez, A., et al. (2016). Effect of supplementation of phytogenic feed additives (powdered vs. encapsulated) on performance and nutrient digestibility in broiler chickens. Poultry Science, 95, 622–629.
6. Lee, H.J., et al. (2012). Anti-influenza virus activity of green tea by-products in vitro and in chickens. Poultry Science, 91(1), 66–73.
7. Daniell, H., et al. (2024). Debulking influenza and herpes simplex virus strains by a wide-spectrum anti-viral protein. Molecular Therapy.
8. Ali, M., et al. (2026). Synergistic effects of Moringa oleifera and Thymus vulgaris methanolic extracts on growth performance, gut acid-base balance, humoral immunity, and nutrient digestibility in broiler chickens.
9. Rajendrasozhan, S. (2024). Antioxidant, antibacterial and antiviral effects of the combination of ginger and garlic extracts. Bioinformation, 20(1), 11–17. PMID 38352909.
10. Zhang, G., et al. (2025). Genomic signatures and host adaptation of H5N1 clade 2.3.4.4b: a call for global surveillance and multi-target antiviral strategies. PMC11964551.
11. 21 C.F.R. § 530.41(d), Drugs prohibited for extralabel use in animals (adamantanes and neuraminidase inhibitors in chickens, turkeys, and ducks).
12. U.S. Department of Agriculture, Agricultural Research Service. Control strategies to prevent and respond to disease outbreaks caused by avian influenza viruses, 2025 annual report.
13. U.S. Department of Agriculture, Animal and Plant Health Inspection Service. Avian influenza.
14. U.S. Department of Agriculture, APHIS. Frequently asked questions: HPAI Poultry Innovation Grand Challenge funding opportunity.
15. U.S. Department of Agriculture, APHIS Veterinary Services. HPAI Poultry Innovation Grand Challenge award selections.
16. U.S. Department of Health and Human Services. U.S. highly pathogenic avian influenza A(H5N1) research priorities: whole-of-government One Health priorities for mitigating H5N1 risk and preventing animal-to-human transmission.