Winter Wellness: 9 Powerful Ways to Beat Cold & Flu Season

Iodine

Iodine is one of the most underrated immune nutrients. It's essential for thyroid function, which governs your metabolism and immune response. Most people are deficient due to depleted soils, reduced use of iodized salt, and the competitive interference of fluoride, bromide, and chloride (all halogens that displace iodine in the body).

Supplementing with nascent or Lugol's iodine can dramatically improve immune function, especially during winter. We test for iodine status in our office and can guide you on optimal supplementation.

Eat Light

When you feel a cold coming on, your body is working hard to fight it. Heavy, processed meals divert energy toward digestion and away from immune activity. During illness — and as a preventive measure — favor light, easily digestible foods: soups, steamed vegetables, and broths. Intermittent fasting can also give your immune system the energy it needs to do its job.

Avoid sugar especially — even a small amount has been shown to suppress white blood cell activity for hours after consumption.

Hydrate Well

Proper hydration keeps your mucosal membranes — your first line of defense — moist and functional. Here are some excellent hydration options beyond plain water:

• Apple Cider Vinegar (ACV): 1–2 tablespoons in warm water supports alkalinity, digestion, and antimicrobial activity.
• Herbal teas: Ginger, chamomile, licorice root, and peppermint teas support immune function while keeping you hydrated and warm.
• Bone broth: Rich in collagen, glycine, and minerals — bone broth heals the gut lining, supports joint health, and nourishes immune cells. A true superfood during cold and flu season.

Powerful Herbs

Nature's pharmacy is loaded with immune-supporting herbs that have stood the test of centuries of use and modern research:

• Echinacea: Reduces duration and severity of colds; best used at first sign of illness
• Elderberry (Sambucus): Rich in antioxidants; shown to reduce flu duration by up to 4 days
• Garlic: Allicin is a potent antiviral and antibacterial compound; best consumed raw or lightly cooked
• Oil of Oregano: Contains carvacrol and thymol — powerful antimicrobials effective against a broad spectrum of pathogens
• Astragalus: A classic adaptogen that strengthens immune surveillance
• Andrographis: Particularly effective for upper respiratory infections
• Cat's Claw: Antiviral and anti-inflammatory; supports deep immune function

Essential Oils

Therapeutic-grade essential oils can be powerful allies during cold and flu season — used aromatically, topically, or in a diffuser:

• Eucalyptus: Opens airways, has antimicrobial properties; excellent in a steam inhaler or diffuser
• Peppermint: Cooling, decongestant, and antiviral; apply diluted to chest or diffuse
• Frankincense: Deeply anti-inflammatory and immune-modulating; supports cellular health
• Thieves/On Guard blend: Combination oils with clove, cinnamon, rosemary, and eucalyptus — excellent preventive diffuser blend
• Tea Tree (Melaleuca): Broad-spectrum antimicrobial; great for surfaces and topical use

Vitamin D

Vitamin D deficiency is epidemic in modern life — and it is one of the strongest predictors of immune vulnerability. Most people need far more than the RDA suggests. During winter months and illness, I typically recommend 10,000–20,000 IU daily, ideally with Vitamin K2 to ensure proper calcium metabolism.

Sunlight guidelines by skin tone:

• Fair/light skin: 10–15 minutes of midday sun exposure (arms and legs exposed) can produce 10,000+ IU
• Medium/olive skin: 20–30 minutes for similar production
• Dark skin: 40–60+ minutes due to melanin's filtering effect

In winter at northern latitudes, sunlight is often insufficient regardless of skin tone — supplementation becomes essential. Always test your levels with a 25-OH Vitamin D blood test.

Antioxidants: Vitamin C & Glutathione

Oxidative stress is a key driver of immune dysfunction. These two antioxidants are your heavy hitters:

Vitamin C: One of the most researched immune nutrients. At therapeutic doses (1,000–5,000 mg/day in divided doses, or to bowel tolerance), it dramatically accelerates recovery and reduces severity of respiratory illness. Liposomal Vitamin C offers superior absorption.

Glutathione / NAC: Glutathione is the master antioxidant — and most people are severely depleted. N-Acetyl Cysteine (NAC) is a precursor that your body uses to make glutathione. NAC also has direct mucolytic (mucus-thinning) properties, making it especially useful for respiratory illness. Liposomal or IV glutathione provides the most direct benefit.

Zinc

Zinc is essential for the development and function of immune cells. It inhibits viral replication — particularly in the upper respiratory tract — and is most effective when taken as zinc lozenges at the first sign of illness (the lozenge format allows zinc ions to coat the throat where viruses replicate).

Food sources of zinc:

• Grass-fed beef and lamb (especially organ meats)
• Wild salmon and oysters (oysters are the highest food source)
• Cashews and pumpkin seeds
• Chickpeas and lentils

Aim for 30–50 mg/day during illness; 15–25 mg/day for maintenance. Always take with food to avoid nausea, and pair with copper to maintain mineral balance.

Chiropractic Adjustments

Chiropractic care isn't just for back pain — it's a powerful immune booster. Research demonstrates that spinal adjustments increase the activity of PMN neutrophils (polymorphonuclear neutrophils) — your immune system's first responders — by up to 200% within 15 minutes of an adjustment.

Subluxations (misalignments in the spine) create nerve interference that suppresses immune signaling. By removing subluxations, chiropractic adjustments allow your nervous system and immune system to communicate freely, improving your body's ability to detect and eliminate pathogens.

During cold and flu season, I recommend weekly or bi-weekly adjustments for optimal immune support.