How to Enhance Your Immune System | Dr. Roger Seheult
Dr. Roger Seheult, a board-certified physician in internal medicine, pulmonary diseases, critical care, and sleep medicine, discusses preventing and treating infectious illnesses. He covers the benefits of light therapy (sunlight, infrared), hydrotherapy, NAC, and other science-based tools for improving immune and mitochondrial function.
Deep Dive Analysis
24 Topic Outline
Pillars of Health for Avoiding Sickness (NEWSTART Mnemonic)
Sunlight's Deep Penetration and Mitochondrial Benefits
Benefits of Infrared Light in Green Spaces
Re-evaluating Sunlight Exposure and Cancer Risk
Sunlight's Impact on Influenza and COVID Incidence
Recommended Sunlight Exposure and Winter Challenges
Artificial Infrared Light and Metabolic Health
Historical Use of Sunlight in Healthcare and Modern Disconnect
Hospital Lighting, ICU Psychosis, and Patient Outcomes
Influenza, Flu Shots, and the Swiss Cheese Model of Protection
Hydration, Innate Immunity, and Hydrotherapy
Cold Hydrotherapy and Immune Cell Mobilization
N-Acetyl Cysteine (NAC) for Liver Support, Clotting, and Infection
NAC Dosage and Mucolytic Effects
Zinc Supplementation and Interferon Infusions
Eucalyptus Oil for Immune Stimulation and Congestion
Air Quality, Smoking, Vaping, and Nicotine Use
Benefits of Fresh Air and Forest Bathing
The 'Dark Days and Bright Nights' Problem
Long COVID, Mitochondrial Dysfunction, and Potential Treatments
COVID Severity, Smell Loss, and Olfactory Training
Mold Toxicity, Germ vs. Terrain Theory, and Immune Compromise
The Role of Trust, Spirituality, and Forgiveness in Health
Advocating for Better Hospital Care
17 Key Concepts
NEWSTART Mnemonic
A mnemonic representing pillars of health: Nutrition, Exercise, Water, Sunlight, Temperance (avoiding toxins), Air, Rest, and Trust. These elements are considered fundamental for maintaining a healthy immune system and overall well-being.
Infrared Light Penetration
Long wavelength infrared light, a significant component of sunlight, can penetrate deeply into the human body (up to 8 cm) and through clothing. This deep penetration allows it to interact with internal biological processes, unlike visible or ultraviolet light.
Mitochondrial Melatonin Production
Mitochondria, the 'engines' of cells, produce melatonin on-site in concentrations 20 times higher than the pineal gland. This intracellular melatonin acts as an extremely powerful antioxidant, combating reactive oxygen species (free radicals) generated during energy production.
Mitochondrial Dysfunction
A fundamental issue underlying nearly every chronic disease, including diabetes, hypertension, heart disease, and dementia. It is also central to the mitochondrial theory of aging, where the efficiency of ATP (energy currency) production by mitochondria significantly declines after age 40.
Phytoncides
Airborne chemicals emitted by trees (e.g., Hinoki Cypress, fir, oak, pine) that can interact with the human immune system. Studies show these substances can stimulate the innate immune system, increasing natural killer cell activity and reducing stress hormones like cortisol.
ICU Psychosis
A condition where patients in intensive care units develop mental health disturbances, including psychosis, often due to disrupted circadian rhythms from constant artificial light and sleep deprivation. This condition typically resolves upon discharge from the hospital.
Swiss Cheese Model
A model illustrating how multiple layers of protection, each with its own flaws (like holes in Swiss cheese), can collectively prevent a problem. In health, it emphasizes that relying on a combination of interventions (e.g., nutrition, exercise, hygiene, vaccines) provides more robust protection against illness.
Innate Immune System
The body's first and non-specific line of defense, recognizing general pathological patterns (PAMPs) and damaged molecules (DAMPs) without prior exposure. It rapidly responds to threats, utilizing crucial molecules like interferon to combat infections.
Interferon
An extremely important molecule in the innate immune system with wide-ranging antiviral capabilities. It is effective against various viral strains and variants, and its suppression is a common strategy used by viruses to evade the immune response.
Hydrotherapy
The external application of water, particularly hot water, to transfer heat to the body, elevate core temperature, and stimulate the innate immune system. This process can significantly increase the secretion of interferon, a key antiviral molecule.
Demargination
A process triggered by cold exposure and subsequent vasoconstriction, where white blood cells (e.g., macrophages, neutrophils) that are normally attached to the inside of blood vessels are released into circulation. This effectively increases the number of circulating immune cells available to fight infection.
White Clots
Thrombi primarily formed by the polymerization of von Willebrand's factor and subsequent platelet aggregation, distinct from typical red blood cell clots. These were observed in high numbers in severe COVID-19 cases during autopsies, contributing to hypoxemia.
Dark Days and Bright Nights
A phenomenon describing the modern lifestyle characterized by insufficient natural light exposure during the day and excessive artificial light exposure at night. This imbalance negatively impacts circadian rhythms, metabolic health, and is associated with higher mortality.
Long COVID
A condition characterized by persistent symptoms such as fatigue, headaches, shortness of breath, or loss of taste/smell for more than 12 weeks after initial COVID-19 infection. It is often linked to underlying mitochondrial dysfunction and impaired fatty acid metabolism.
Olfactory Training
A protocol used to help recover the sense of smell after conditions like COVID-19, involving repeatedly smelling a variety of distinct odors (e.g., orange, lemon, coffee, chocolate). This stimulates and aids in the regeneration of olfactory neurons, which turn over in an activity-dependent way.
Germ Theory vs. Terrain Theory
Two perspectives on disease causation: Germ theory focuses on external pathogens (germs) as the primary cause, while terrain theory emphasizes the host's internal environment (immune system health). The episode highlights that both factors are crucial for understanding infection and illness, not one or the other.
Conditional vs. Unconditional Forgiveness
Conditional forgiveness requires an apology or remorse from the offending party, whereas unconditional forgiveness is granted regardless of the other person's actions. Studies suggest unconditional forgiveness is associated with less anxiety and fewer somatic complaints.
6 Questions Answered
Approximately 15-20 minutes of sunlight exposure per day is generally sufficient, as benefits diminish significantly after this point. This can be done at any time of day, though midday sun has higher UV, which can be mitigated by clothing.
Yes, infrared radiation from the sun, due to its long wavelength, can penetrate through clothes and skin, activating heat sensors and reaching much deeper into the body than visible light.
No, the flu shot does not prevent infection, but it gives the immune system advanced notice of the antigen, which can significantly diminish the severity of symptoms if infection occurs, potentially preventing hospitalization.
Risks include allergic reactions, such as anaphylactic shock. Historically, one particular strain in Europe was associated with a rash of narcolepsy, though this was an isolated incident and that brand was stopped.
NAC acts as a mucolytic by breaking the disulfide bonds that make mucus thick, thereby thinning it and making it easier to clear from the respiratory pathways. It's used to treat conditions like cystic fibrosis and can cause a runny nose.
The most effective way is for the patient or a family member to communicate to the physician that they are familiar with the patient's condition and are prepared to ask intelligent, informed questions. This encourages the medical staff to be at their best and focus on effective answers.
19 Actionable Insights
1. Prioritize Daily Sunlight Exposure
Expose your skin to 15-20 minutes of natural sunlight daily, even on cloudy days, as infrared light penetrates deep into the body, stimulating mitochondria to produce melatonin and increase efficiency, which is crucial for overall health and combating age-related decline. If fair-skinned, wear a broad-rimmed hat and long-sleeved shirt to limit UV exposure while still benefiting from infrared light.
2. Ensure Dark Nights for Sleep
Maintain complete darkness in your sleeping environment, using blackout curtains or an eye mask, as even dim artificial light (e.g., 100 lux) at night can significantly suppress melatonin production and negatively impact morning blood glucose levels. If you need to navigate at night, use a flashlight pointed away from your eyes or a red light source.
3. Practice Mild-to-Moderate Exercise
Engage in mild to moderate exercise regularly, as this type of physical activity is shown to reduce inflammation in the body, contributing to a healthier immune system.
4. Adopt Natural, Unprocessed Nutrition
Focus on consuming foods that are as natural as possible and actively avoid processed foods to support overall health and immune function.
5. Prioritize 7-8 Hours of Sleep
Aim for 7-8 hours of quality sleep each night, as good sleep habits are directly linked to a much better immune system, improving antibody response and reducing the frequency of illness.
6. Cultivate Thankfulness & Forgiveness
Practice thankfulness and unconditional forgiveness, as these mental states are associated with less anxiety, fewer somatic complaints, and an overall greater sense of well-being, contributing to physical health.
7. Engage in Heat-Cold Contrast Therapy
Utilize hot baths, saunas, or hot fomentations (hot towels) to elevate your core body temperature to around 38-39°C (100.4-102.2°F), followed by a short cold exposure (e.g., a cold shower). Heat increases interferon secretion (a broad-spectrum antiviral), while cold causes vasoconstriction, liberating white blood cells into circulation and helping to ’lock in’ the heat.
8. Spend Time in Green Spaces
Seek out and spend time in natural green environments like forests or parks, as trees release phytoncides that stimulate the innate immune system and reduce stress, and green leaves reflect additional beneficial infrared light.
9. Maintain Adequate Hydration
Drink sufficient water to maintain proper sodium concentration in your body, as adequate hydration is essential for kidney function, toxin removal, and overall cellular health.
10. Avoid Toxins (Smoking, Vaping)
Refrain from inhaling anything other than clean air or prescribed medicines, specifically avoiding smoking and vaping, as these introduce irritants and toxins that are detrimental to lung health and overall well-being.
11. Consider NAC for Flu/Cold Symptoms
Take 600 milligrams of N-acetylcysteine (NAC) twice a day during winter or flu season for up to three months to replenish glutathione, act as a mucolytic, and significantly reduce the severity of influenza symptoms like runny nose and sore throat.
12. Consider Zinc Supplementation
Supplement with up to 40 milligrams of elemental zinc daily, as zinc acts as a cofactor for several immune system enzymes, potentially benefiting overall immune function. Monitor copper levels with long-term high-dose zinc use.
13. Use Eucalyptus Oil Externally for Congestion
If congested, use eucalyptus oil externally by rubbing a few drops on the skin or adding it to hot water for steam inhalation. Do not ingest eucalyptus oil internally, as it can be toxic.
14. Do Not Suppress Fever (Unless Advised)
Generally, avoid immediately suppressing a fever with medication, as fever is a natural immune response that helps the body fight infection by increasing the production of antiviral interferon.
15. Utilize Intermittent Fasting for Mitochondrial Health
For conditions like long COVID or general metabolic health, consider practicing intermittent fasting (e.g., avoiding food after 5:30 PM) to allow the body to generate new, healthy mitochondria by breaking down damaged cells and promoting regeneration.
16. Use Artificial Red/Near-Infrared Light
If natural sunlight exposure is consistently scarce (e.g., in winter in northern latitudes), consider supplementing with low-amplitude red/near-infrared lamps for 15-20 minutes a day to support mitochondrial function. Avoid excessive intensity, as more is not necessarily better.
17. Humidify Air in Cold/Dry Environments
If prone to respiratory issues in cold, dry environments, consider using a humidifier, especially at night, to prevent drying out of respiratory pathways.
18. Practice Smell Training
If experiencing a loss of smell or taste (e.g., post-COVID), engage in smell training using a variety of distinct odors (e.g., lemon, coffee, chocolate) to help reactivate and regenerate olfactory neurons.
19. Communicate Knowledgeably in Hospital
When a loved one is admitted to the hospital, ask intelligent, informed questions about their disease and treatment plan. This signals to the medical staff that you are engaged and knowledgeable, which can lead to more thorough and attentive care.
5 Key Quotes
Sunlight strongly protects against getting influenza.
Dr. Roger Seheult (quoting Harvard Kennedy School Study)
Sunlight, Time for a Rethink.
Dr. Roger Seheult (quoting Richard Weller in Journal of Investigative Dermatology)
When it comes to treating the whole patient, the one thing that more than anything else is beneficial for these soldiers to recover is fresh air. But, she said, a very close second is direct sunlight, getting them out into sunshine, getting them out into direct sunlight.
Dr. Roger Seheult (quoting Florence Nightingale)
This idea of keeping the lights on after 9 o'clock, it's a wretched, health-destroying habit. Every light should be extinguished, she said, after 9 o'clock.
Dr. Roger Seheult (quoting Ellen G. White)
Eucalyptus oil is never recommended to be taken internally. There's actually been reported deaths from taking too much eucalyptus oil.
Dr. Roger Seheult
3 Protocols
Hydrotherapy for Illness
Dr. Roger Seheult- Apply hot towels (fomentations) or take a hot bath/sauna for about 20 minutes until sweating begins, to elevate core body temperature.
- Follow with a very short (approximately 1 minute) cold exposure, such as a cold shower or rubbing the chest with cold water, to cause vasoconstriction and demargination of white blood cells.
Long COVID Mitochondrial Regeneration
Dr. Roger Seheult- Practice intermittent fasting, avoiding food after a certain time (e.g., 5:30 PM) to allow the body to break down damaged cells and regenerate new ones.
- Increase daily sunlight exposure to support mitochondrial function and potentially mitigate inflammation.
Olfactory Training for Smell Loss
Dr. Roger Seheult- Repeatedly smell a variety of distinct odors (e.g., orange, lemon, coffee, chocolate).
- Continue this training to stimulate and help regenerate olfactory neurons and their connections in the brain.