The Sol Journal

6 steps to build stronger immunity this winter 

wellness

6 steps to build stronger immunity this winter 

24 July, 2026

Around 70% of your immune system lives in your gut, which makes your digestion one of your greatest allies this winter. Discover six simple, nutritionist-approved ways to support your immunity from the inside out.

With winter settled in here in Australia, now is the time to give your immune health a little extra care. You might be wondering what detoxing and digestion have to do with fending off the winter sniffles. As it turns out, quite a lot. The connection all comes back to your gut.

Here is something that surprises most people: around 70% of your immune system actually lives in and around your gut. Your digestive tract does so much more than break down the food you eat. It is home to trillions of microorganisms, collectively known as your gut microbiome, and it is one of the busiest command centres your immune system has.

The science here has come a long way in recent years, and it is genuinely fascinating. Your gut lining is dotted with immune tissue that is in constant conversation with the bacteria living alongside it. When that microbial community is diverse and well balanced, it helps your body tell friend from foe, keeps your gut barrier strong, and calms unnecessary inflammation. When it falls out of balance, something researchers call ‘dysbiosis’, that ripple effect can show up as digestive troubles, low energy, and a less resilient immune response.

The way your gut bacteria are nourished is just as remarkable. When you eat fibre-rich plant foods, the beneficial bacteria in your gut ferment that fibre and produce compounds called short-chain fatty acids. These small molecules do some of the most important work in the body. They help fuel the cells lining your gut, reinforce that all-important barrier, and support balanced immune activity, not just in your digestive tract but throughout the body. Research now shows this gut activity even reaches your lungs and airways through what scientists call the ‘gut–lung axis’, which is especially reassuring during cold and flu season.

In other words, looking after your gut is one of the most meaningful ways to support your immunity this winter. The good news is that it is wonderfully simple, and it starts with what is on your plate and in your daily rituals. Here are six gentle, nutritionist-approved steps to help you feel your best through the cooler months.

6 steps to building stronger immunity this winter

Naturally support your immunity
1. Feed your gut a diverse range of whole foods
Diversity is the golden rule of gut health. The wider the variety of plants you eat, the more diverse and resilient your microbiome becomes, and the more short-chain fatty acids your good bacteria can produce. Aim to eat the rainbow, and lean into fibre-rich winter veg like broccoli, kale, leeks and beetroot. Our Whole Food Meal Packs take the guesswork out of this, with organic, plant-rich meals thoughtfully created to deliver a beautiful spread of nourishing ingredients across your week. And if getting enough variety feels tricky when it is cold and you are reaching for comfort food, our Harvest Greens Powder is a simple way to add a spectrum of organic wholefood goodness to your day. For deeper gut support, our Gut Restore + Repair is thoughtfully formulated to nourish your gut lining and help restore microbial balance, giving your immune headquarters a strong foundation to work from.
Naturally support your immunity
2. Reach for functional, immune-loving foods
Certain ingredients have been treasured for generations for their supportive properties, and modern research is catching up to that traditional wisdom. Ginger, turmeric, garlic and citrus are wonderful additions to your winter kitchen. When life is busy, our Immunity Shots make it effortless. Packed with organic ginger, turmeric, lemon and more, they are a quick daily ritual to support your body through the sniffle season. For a whole food hit of Vitamin C, our Organic Camu Camu Powder is one of nature’s richest sources, gentle on the gut and easily stirred into water, smoothies or juice.
Naturally support your immunity
3. Stay hydrated and warm from within
Hydration is easy to forget when the weather cools, but water keeps everything moving and supports your body’s natural detox pathways, which in turn eases the load on your immune system. Aim for around eight glasses a day. A warming herbal tea is a beautiful way to top up your fluids while you are at it. Our Protect Organic Immunity Tea blends organic ginger, echinacea, elderflower and rosehip into a soothing cup that feels like a warm hug on a cold day.
Naturally support your immunity
4. Keep moving
Gentle, regular movement boosts circulation and helps your immune cells travel where they are needed. It is also a wonderful stress reliever, which your gut will thank you for. You do not need to overdo it. A brisk winter walk, a yoga flow or a dance around the kitchen all count. Balance is everything, as too much intense exercise can tip into stress for the body.
Naturally support your immunity
5. Prioritise rest
Sleep is when your body does most of its repair and restoration, and your gut and immune system both do some of their best work overnight. Aim for seven to nine hours of quality rest. If winter has you craving an earlier night, listen to that instinct. Your immune system rebuilds while you sleep.
Naturally support your immunity
6. Soothe your stress
Chronic stress and your immune system are not the best of friends. When stress lingers, it can throw both your gut balance and your immune response off course. Find the practices that help you truly unwind, whether that is meditation, time in nature, a good book or simply slowing down. Make it personal and gentle, and let it become a daily ritual rather than another thing on the to-do list.

Building stronger immunity is not about doing everything perfectly. It is about small, consistent choices that nourish your gut and support your body from the inside out. Be kind to yourself this winter, tune into what your body needs, and let these simple rituals become a comforting part of your season.