What it is: Vira-Shield is a gluten-free, seven-ingredient botanical antimicrobial and immune support formula developed by DaVinci Labs, combining Black Walnut (Juglans nigra) Green Hull, Wormwood (Artemesia annua), Grapefruit Seed Extract, Olive Leaf Extract (standardized to oleuropein), Pau D'Arco (Tabebuia impetiginosa) bark, Black Cumin (Nigella sativa) seed, and odorless Garlic bulb extract — each delivering 200 mg per serving. This formula represents a traditionally informed, multi-botanical approach to supporting the body's natural elimination of unwanted microorganisms across the gastrointestinal tract, immune system, and systemic detoxification pathways. Designed for practitioner-directed use in antimicrobial, parasite, candida, GI tract, and immune support protocols, Vira-Shield combines seven of the most historically recognized and research-supported botanical antimicrobial agents within a single, convenient twice-daily tablet formula intended for use over a one- to three-month clinical course.
How it works: Vira-Shield supports the body's elimination of unwanted microorganisms and maintenance of immune and gastrointestinal health through the complementary and broad-spectrum antimicrobial, antifungal, antiparasitic, and immunomodulatory activities of its seven botanical ingredients. Olive Leaf Extract (200 mg, yielding 30 mg oleuropein) — the primary active phenolic glycoside of Olea europaea — disrupts microbial cell membrane integrity and inhibits viral replication through its documented interference with amino acid production in pathogens, while simultaneously supporting innate immune function and phagocytic activity. Wormwood (Artemesia annua) — the source of the sesquiterpene lactone artemisinin — provides broad-spectrum antimicrobial activity against bacteria, protozoa, and parasites, while supporting healthy functioning of the digestive, respiratory, and circulatory systems and regulating inflammatory processes. Pau D'Arco (Tabebuia impetiginosa) bark contains lapachol and beta-lapachone — naphthoquinone compounds with documented antifungal, antibacterial, and antiparasitic activity — supporting detoxification and the reduction of unwanted microorganism burden in the gastrointestinal and systemic environment. Grapefruit Seed Extract delivers polyphenolic compounds — primarily naringenin, hesperidin, and their glycosides — that support healthy bacterial balance in the GI tract while helping to expel unwanted bacteria, protozoa, viruses, and fungi through disruption of their cell membrane phospholipid bilayers. Black Cumin (Nigella sativa) seed provides thymoquinone — the primary bioactive constituent responsible for its broad-spectrum antimicrobial, antifungal, antiparasitic, and immunomodulatory activity — supporting circulatory, respiratory, gastrointestinal, and detoxification system health. Odorless Garlic bulb extract delivers allicin-yielding precursor compounds and alliin that are converted to allicin upon ingestion, providing potent broad-spectrum antimicrobial activity against bacteria, fungi, parasites, and protozoa in the digestive tract. Black Walnut (Juglans nigra) green hull provides juglone — a naphthoquinone compound with antimicrobial, antifungal, and antiparasitic properties — alongside condensed tannins that exert an astringent and protective effect on the mucosal lining of the gastrointestinal tract, supporting normal mucosal cell function and tissue integrity.
When to use it: Vira-Shield is appropriate for practitioner-directed use in adult clients requiring comprehensive botanical antimicrobial, antiparasitic, antifungal, and immune support — particularly in protocols addressing gastrointestinal dysbiosis, candida overgrowth, parasitic burden, recurrent microbial challenges, or suboptimal immune surveillance. The recommended protocol of four tablets daily — two on an empty stomach in the AM and two on an empty stomach in the PM — taken over one to three months supports a sustained botanical antimicrobial course appropriate for the clinical time requirements of comprehensive GI terrain restoration. Empty stomach dosing is recommended to maximize systemic bioavailability of the botanical active compounds without competitive inhibition from dietary macronutrients. This formula contains tree nuts (Black Walnut) and is contraindicated in pregnancy and nursing. Clients with ragweed, chrysanthemum, marigold, or daisy allergies, or those taking blood-thinning medications, should consult their practitioner before use.
Serving Size: 2 Tablets
Servings Per Container: 60
Suggested Use: As a dietary supplement, take 2 tablets in the AM on an empty stomach and 2 tablets in the PM on an empty stomach. Take recommended amount for 1–3 months, or as directed by your healthcare practitioner.
|
Ingredient |
Amount Per Serving |
% Daily Value |
|
Black Walnut (Juglans nigra) Green Hull |
400 mg |
* |
|
Wormwood (Artemesia annua) Stem & Leaf Powder |
200 mg |
* |
|
Grapefruit (Citrus paradisi) Seed Extract |
200 mg |
* |
|
Olive (Olea europaea) Leaf Extract (yielding Oleuropein 30 mg) |
200 mg |
* |
|
Pau D'Arco (Tabebuia impetiginosa) Bark Powder |
200 mg |
* |
|
Black Cumin (Nigella sativa) Seed |
200 mg |
* |
|
Garlic (Allium sativum) (Odorless) Bulb Extract |
200 mg |
* |
* Daily Value not established.
Other Ingredients: Microcrystalline cellulose, stearic acid, croscarmellose sodium, vegetable stearate, silicon dioxide, pharmaceutical glaze (coating).
Contains: Tree nuts (Black Walnut).
Caution: Do not take this product if pregnant or nursing. If you have allergies to ragweed, chrysanthemums, marigolds, or daisies, or if you are taking blood-thinning medications, do not take this product without first consulting your healthcare practitioner. Keep out of reach of children. Store in a cool, dry place. Color may vary due to natural ingredient variation.
✓ Gluten Free
Key Ingredients
Olive (Olea europaea) Leaf Extract — 200 mg (yielding 30 mg Oleuropein) Olive leaf extract is standardized to oleuropein — the primary secoiridoid glycoside responsible for the leaf's well-characterized antimicrobial and immunomodulatory activity — a phenolic compound with a broad-spectrum mechanism involving the disruption of pathogen amino acid synthesis, inhibition of viral replication through interference with viral enzyme and capsid protein production, and direct disruption of microbial cell membrane integrity in bacteria and fungi. Oleuropein additionally activates innate immune pathways through toll-like receptor stimulation and macrophage phagocytic upregulation, supporting the immune system's natural surveillance and elimination capacity independent of its direct antimicrobial activity. With over 2,000 years of traditional Mediterranean use for infection and immune support, and a growing modern research portfolio, Olive Leaf Extract serves as the primary immune-supportive and broad-spectrum antimicrobial anchor of this formula.
Wormwood (Artemesia annua) — 200 mg Artemesia annua (Sweet Wormwood) is the botanical source of artemisinin — a sesquiterpene lactone endoperoxide bridge compound with one of the most comprehensively studied antimicrobial and antiparasitic mechanisms in botanical medicine, operating through the generation of reactive oxygen species upon interaction with iron-containing heme in susceptible microorganisms that damage parasite and pathogen cellular structures. Beyond its artemisinin content, Artemesia annua provides a spectrum of flavonoids including artemetin and casticin that contribute anti-inflammatory, immunomodulatory, and antifungal activity, collectively supporting the healthy functioning of the digestive, respiratory, and immune systems. Its dual action — direct antimicrobial/antiparasitic activity alongside immune regulatory and anti-inflammatory support — makes Artemesia annua one of the most clinically versatile botanicals in this formula's seven-ingredient antimicrobial matrix.
Pau D'Arco (Tabebuia impetiginosa) Bark Powder — 200 mg Pau D'Arco is the inner bark of the Tabebuia impetiginosa tree — a South American rainforest botanical with centuries of traditional use by indigenous peoples for antimicrobial and antifungal applications — containing lapachol and beta-lapachone as its primary bioactive naphthoquinone compounds. Lapachol and beta-lapachone exert antimicrobial activity through generation of superoxide radicals within susceptible microbial cells via redox cycling, effectively disrupting electron transport chain function in fungi, bacteria, and parasites through mechanisms that exploit the metabolic differences between eukaryotic pathogens and human host cells. Pau D'Arco provides particularly notable antifungal coverage within this formula — with documented activity against Candida albicans, Aspergillus, and other opportunistic fungal organisms — complementing the antibacterial and antiparasitic activity of the formula's other botanicals to provide broad-spectrum microbial coverage across multiple kingdom-level pathogen categories.
Grapefruit (Citrus paradisi) Seed Extract — 200 mg Grapefruit Seed Extract delivers a concentrated polyphenolic matrix — including naringenin, hesperidin, quercetin, and their glycosides — with broad-spectrum antimicrobial activity against bacteria, viruses, fungi, and protozoa through disruption of pathogen cell membrane phospholipid bilayer integrity and inhibition of microbial enzyme systems essential for pathogen survival and replication. Its primary clinical application in gastrointestinal health protocols involves selective pressure on pathogenic microorganisms while supporting the maintenance of the healthy bacterial balance in the GI tract — a selectivity attributed to the polyphenols' differential affinity for pathogenic versus commensal bacterial membrane compositions. Grapefruit Seed Extract's broad anti-pathogen coverage — spanning bacterial, viral, fungal, and protozoal categories — makes it a uniquely comprehensive single ingredient that addresses multiple classes of potential GI pathogens simultaneously.
Black Walnut (Juglans nigra) Green Hull — 400 mg Black Walnut green hull — delivered at the highest dose in this formula at 400 mg per serving — is the unripened outer husk of Juglans nigra nuts, containing juglone (5-hydroxy-1,4-naphthoquinone) as the primary bioactive naphthoquinone alongside ellagitannins, gallic acid, and condensed tannins that collectively provide the formula's most concentrated antimicrobial, antiparasitic, and mucosal astringent activity. Juglone exerts its antimicrobial and antiparasitic activity through a mechanism similar to Pau D'Arco's lapachol — inhibiting cellular respiration in susceptible organisms through disruption of the electron transport chain — with particularly documented activity against intestinal parasites, Candida species, and certain pathogenic bacteria. The condensed tannin content of Black Walnut green hull provides a complementary astringent effect on gastrointestinal mucosal tissue, reducing mucosal permeability and providing a structural protective layer that supports normal mucosal cell function and tissue integrity throughout the GI tract.
