Sept 21, 2026
The current McCullough protocol for preventing and managing viral upper respiratory infections focuses heavily on an oral-nasal hygiene regimen intended to neutralize viruses at their entry points. Promoted by Dr. Peter McCullough through platforms like The Wellness Company, the core elements include: [1]
* Virucidal Nasal Sprays/Flushes: Done twice daily for routine prevention, or up to every 4 hours if actively exposed or symptomatic. This typically utilizes a diluted 1% povidone-iodine (PVP-I) solution (or alternatives like Xlear xylitol/grapefruit seed extract sprays, or diluted hydrogen peroxide if iodine-allergic).
* Oral Gargles: Gargling with a similarly diluted 1% povidone-iodine solution or standard antiseptic mouthwashes for 30 seconds twice daily to reduce viral loads in the throat.
* Nutritional Supplements: Daily preventive use of Zinc (50 mg), Vitamin D3 (5,000 IU), Vitamin C, and Quercetin (500 mg) to support general immune defense. [2, 3, 4, 5]
(Note: For post-infection recovery or addressing lingering viral proteins, he advocates for a separate oral regimen known as the Base Spike Detoxification (BSD) protocol, which consists of Nattokinase, Bromelain, and Curcumin). [6]
⚠️ Crucial Health & Safety Considerations
While topical antiseptics like povidone-iodine have demonstrated the ability to kill viruses in laboratory (in vitro) settings, their practical effectiveness in preventing or treating systemic viral infections in humans remains a subject of ongoing clinical debate and lacks definitive scientific consensus. [7, 8]
If you are considering adopting this regimen, please keep the following safety warnings in mind:
* Thyroid Risks: Povidone-iodine is highly absorbable through the mucous membranes. Regular or prolonged usage can alter thyroid function and elevate Thyroid-Stimulating Hormone (TSH) levels. It should never be used by individuals with thyroid disease, pregnant or nursing women, or anyone with an iodine allergy. [3, 4]
* Do Not Ingest: Iodine rinses and hydrogen peroxide must be diluted correctly according to proper medical guidance and never swallowed, as ingestion can cause gastrointestinal toxicity. [4]
* Standard Medical Prevention: Mainstream medical organizations—including the [CDC](https://www.cdc.gov/cfa-qualitative-assessments/php/data-research/season-outlook25-26-dec-update.html) and major health networks—maintain that the primary, evidence-based methods for avoiding severe respiratory viruses include seasonal vaccinations (for Flu, COVID-19, and RSV), frequent handwashing, staying home when sick, and using air filtration or ventilation. [9, 10, 11, 12, 13]
Always consult with your primary healthcare professional before introducing any new supplement protocol or nasal/oral chemical rinses to ensure they are safe for your personal health history.
[1] [https://www.linkedin.com](https://www.linkedin.com/posts/michelleshadwickmoeller_great-simple-health-tip-from-peter-mccullough-activity-7299880978963988480-5g3U)
[2] [https://www.victorymed.com](https://www.victorymed.com/covid-19-precautions/)
[3] [https://www.scribd.com](https://www.scribd.com/document/857506492/easy-and-effective-shield-from-covid-19-pdf)
[4] [https://medhelpclinics.com](https://medhelpclinics.com/resources/advice-from-the-doctor/at-home-treatment-protocol-for-covid-19)
[5] [https://www.linkedin.com](https://www.linkedin.com/posts/michelleshadwickmoeller_great-simple-health-tip-from-peter-mccullough-activity-7299880978963988480-5g3U)
[6] [https://pmc.ncbi.nlm.nih.gov](https://pmc.ncbi.nlm.nih.gov/articles/PMC10663976/)
[7] [https://www.imrpress.com](https://www.imrpress.com/journal/RCM/22/2/10.31083/j.rcm2202033)
[8] [https://www.medrxiv.org](https://www.medrxiv.org/content/10.1101/2022.08.18.22278340v1.full-text)
[9] [https://www.cdc.gov](https://www.cdc.gov/cfa-qualitative-assessments/php/data-research/season-outlook25-26-dec-update.html)
[10] [https://share.upmc.com](https://share.upmc.com/2025/10/respiratory-virus-season/)
[11] [https://www.ama-assn.org](https://www.ama-assn.org/public-health/prevention-wellness/doctors-united-respiratory-virus-vaccine-recommendations)
[12] [https://www.sciencedirect.com](https://www.sciencedirect.com/science/article/pii/S0002934320306732)
[13] [https://health.ri.gov](https://health.ri.gov/press-releases/ridoh-issues-vaccination-recommendations-respiratory-virus-season)