Posted by Tia Miers
on July 30, 2026
The mornings get darker, the motivation to move shrinks, and somewhere in the middle of it all your immune system is quietly working overtime.
After more than a decade in clinic, I can tell you winter immune support doesn't have to mean endless supplements or green-juice detoxes. The women who sail through the cold months tend to have a few things in common — and all of them come back to building a body that stays resilient consistently, not just when you feel a cold coming on.
Here are my five favourite evidence-informed strategies for supporting your immune system this winter.
Real immune resilience is built on consistent foundations — not last-minute supplements.
Up to 70% of your immune system lives in your gut, making gut health a winter priority.
Sleep and stress are immune interventions, not "nice to haves."
Heat (saunas) and immune-supportive nutrition both have research behind them.
Start with one or two of these and build — small, consistent actions compound.
1. Use Heat as an Immune Tool: The Case for Saunas
When your body is exposed to heat, your core temperature rises, mimicking a mild fever — one of your immune system's most powerful natural responses. Regular sauna use stimulates white blood cell production, activates heat shock proteins, supports lymphatic flow, lowers cortisol and improves sleep. Studies have also found regular sauna users experience fewer common colds.
Naturopath tip: aim for 2–3 sessions a week, 15–20 minutes. New to it? Start lower and build up. Infrared is a great option if you're sensitive to high heat.
2. Eat Like Your Immune System Depends On It — Because It Does
Your immune cells need the right fuel to function. Key nutrients for winter:
Vitamin C — citrus, capsicum, kiwifruit, broccoli
Zinc — pumpkin seeds, chickpeas, lentils, red meat
Vitamin D — fatty fish, eggs, mushrooms (and sensible sun; supplementation is worth considering in winter)
Antioxidants — berries, leafy greens, dark chocolate, green tea
The tricky part is that cooking inspiration drops in winter — which is when convenience food creeps in. Inside the [Whole Health Hub →] (internal link) you'll find 30+ wholefood recipes — from immune-supporting soups to quick, satisfying meals — free with any WHS supplement subscription.
3. Nurture Your Gut: Up to 70% of Your Immune System Lives There
This is the one that surprises people most — up to 70% of your immune system is housed in your gut. When your gut is balanced, its microbes help train your immune cells, produce protective compounds and form a barrier against pathogens. When it's out of balance (dysbiosis), the immune system becomes dysregulated. Focus on:
Fermented foods — yoghurt, kefir, kimchi, sauerkraut, kombucha
Prebiotic-rich foods — garlic, onion, leeks, asparagus, oats
Fibre from a diverse range of veg, legumes and wholegrains
Reducing alcohol, refined sugar and ultra-processed foods
Inline product: If your gut needs more than a dietary tweak, the [WHS Gut Reset Pack →] (internal link) is formulated to support a balanced microbiome and healthy digestion. A resilient immune system starts here.*
4. Take Your Stress Seriously — It Is an Immune Issue
Chronic stress is one of the most significant immune suppressors we know of. Elevated cortisol over time reduces immune cell production, dampens your inflammatory response and slows recovery. You don't need to meditate for an hour a day — small, consistent practices win:
10-minute walks in nature
Breathwork (box breathing or 4-7-8)
Journalling
Protecting your calendar — saying no is a health decision
Sauna (yes, twice on this list — the cortisol-lowering effect is that good)
Naturopath tip: the goal isn't zero stress, it's recovering from it well. Adaptogens like ashwagandha, Siberian ginseng and rhodiola can be supportive — speak to a naturopath about what's right for you.
5. Sleep Is Immune Medicine — Treat It That Way
During sleep, your body produces cytokines that help regulate immune responses. Research has shown that consistently sleeping fewer than seven hours makes you up to three times more likely to catch a cold when exposed to a virus. To improve sleep quality:
Protect a 30–60 minute screen-free wind-down
Keep your room cool (18–20°C) and dark
Anchor consistent sleep/wake times, even on weekends
Limit evening alcohol
Consider magnesium glycinate before bed
Naturopath tip: waking regularly between 2–4am can signal blood sugar instability or elevated cortisol — worth investigating with a practitioner.
"Immune resilience isn't built in the moment you feel a cold coming on — it's built in the ordinary days before it."
Your Simple Winter Routine
Move your body, eat real food, nurture your gut, manage your stress, sleep. Start with one or two and build. If you want to go deeper on any of these, our guides to [gut health and your immune system →], [natural stress reduction →] and [why you're always tired →] (internal links) pick up exactly where this leaves off.
Support Your Immunity Naturally
Frequently Asked Questions
What's the most important thing I can do for my immune system in winter?
There's no single answer — resilience is built on consistent foundations. If I had to prioritise, I'd say sleep and gut health, because both underpin every other immune function.
Do I need supplements for immune support?
Not necessarily. A wholefood diet, quality sleep, stress management and gut health take you a long way. Targeted supplementation (vitamin D, zinc, specific herbs) can help where there's a genuine need — best on a strong lifestyle foundation, not instead of one.
How does stress affect immunity?
Chronically elevated cortisol reduces immune cell production, dampens your inflammatory response and slows recovery. Stress management is a direct immune intervention.
Is it normal to get more colds in winter?
More time indoors increases viral exposure — but people with robust immune systems are far less susceptible, which is why building resilience before winter matters more than reacting once you're sick.
Can gut health really affect how often I get sick?
Yes. With up to 70% of the immune system in the gut, your microbiome has a profound effect on immune function and your body's ability to fight off pathogens.
*This article is general information only and is not a substitute for personalised medical advice. Always consult your healthcare practitioner before starting a new supplement, especially if pregnant, breastfeeding or on medication. Whole Health Studio products are TGA-registered. Always read the label and follow directions for use.
Tia Miers, Founder & Naturopath (BHSc)
