Winter Wellness: Nourishing Your Immune System Through Food, Nutrients and Herbs
- Jun 29
- 4 min read
As the temperatures drop and winter settles in, many of us start thinking about how to stay well during cold and flu season. While there is no single nutrient, food or herb that can prevent illness, supporting your immune system through good nutrition, healthy lifestyle habits and targeted supplementation can help your body function at its best throughout the winter months.
The immune system relies on a wide range of nutrients and plant compounds to support its normal function. Fortunately, many of these can be found in everyday foods and evidence-informed nutritional supplements.
Food First: Building Immune Resilience
A nutrient-dense diet provides the building blocks required for healthy immune function.
Focus on:
Colourful vegetables and fruits for antioxidants and phytonutrients
High-quality protein from fish, eggs, poultry, legumes and lean meats
Healthy fats from olive oil, nuts, seeds and oily fish
Fermented foods such as sauerkraut, kimchi and natural yoghurt to support gut health
Bone broths and slow-cooked soups that provide nourishment during the colder months
Remember that approximately 70% of the immune system is associated with the gut, making digestive health an important part of overall immune resilience.
Zinc: A Key Immune Mineral
Zinc plays an essential role in normal immune system function and is involved in the development and communication of immune cells.
Low zinc levels may affect immune function and are surprisingly common in individuals with digestive issues, restrictive diets, chronic stress, or poor dietary intake.
Foods rich in zinc include:
Oysters
Beef and lamb
Pumpkin seeds
Cashews
Chickpeas
Eggs
Because zinc is not stored in large amounts within the body, regular dietary intake is important.
Vitamin D: The Sunshine Nutrient
Vitamin D is involved in many aspects of immune regulation. During winter, reduced sunlight exposure can contribute to lower vitamin D levels, particularly in people who spend most of their day indoors.
Research has shown that vitamin D receptors are found throughout the immune system, highlighting its importance in supporting normal immune function.
Sources of vitamin D include:
Sensible sun exposure
Oily fish such as salmon and sardines
Egg yolks
Fortified foods
Many Australians have suboptimal vitamin D levels, particularly during winter, making testing worthwhile for those concerned about their status.
Garlic: Nature's Winter Favourite
Garlic has been used traditionally for centuries and contains naturally occurring sulphur compounds such as allicin.
In addition to its culinary uses, garlic has a long history of traditional use in Western herbal medicine and remains a popular winter wellness food.
Ways to include more garlic:
Add fresh garlic to soups and casseroles
Roast whole garlic and spread onto sourdough
Include garlic in homemade salad dressings
Add crushed garlic to stir-fries and vegetable dishes
Vitamin C: More Than Just Oranges
Vitamin C is a powerful antioxidant that supports immune system health and helps protect cells from oxidative stress.
While citrus fruits are often the first foods that come to mind, many vegetables contain even higher levels of vitamin C.
Excellent sources include:
Capsicum
Broccoli
Kiwi fruit
Strawberries
Citrus fruits
Brussels sprouts
Parsley
Because vitamin C is water-soluble and not stored in significant amounts, regular daily intake is important.
Gut Health: The Foundation of Immune Health
Did you know that approximately 70–80% of the immune system is associated with the gut? The digestive tract is home to trillions of microorganisms that interact closely with immune cells, helping the body distinguish between harmless substances and potential threats.
When gut health is compromised, it can influence immune function, inflammation, nutrient absorption, and overall resilience. Factors such as chronic stress, poor diet, antibiotic use, inadequate sleep, and digestive dysfunction may impact the balance of the gut microbiome and the integrity of the gut lining.
Supporting gut health during winter can be an important strategy for maintaining overall wellbeing. Some simple ways to nourish the gut include:
Eating a wide variety of colourful plant foods
Including fibre-rich foods such as vegetables, legumes, nuts and seeds
Consuming fermented foods such as sauerkraut, kimchi and natural yoghurt if tolerated
Ensuring adequate protein intake to support tissue repair and immune function
Managing stress and prioritising quality sleep
Staying hydrated throughout the day
Other Immune-Supportive Foods and Herbs
Ginger
Traditionally used in herbal medicine and perfect in warming teas, soups and winter cooking.
Mushrooms
Varieties such as shiitake and maitake contain naturally occurring compounds that support overall health and wellness.
Onion
Rich in flavonoids and beneficial plant compounds that complement a healthy winter diet.
Bone Broth
Provides amino acids and nutrients that support overall wellbeing, particularly during colder weather.
Green Tea
Contains naturally occurring antioxidants known as catechins that help protect cells from oxidative stress.
Lifestyle Factors Matter Too
Nutrition is only one piece of the immune health puzzle.
For optimal immune function:
Aim for 7–9 hours of quality sleep
Manage stress levels
Stay physically active
Spend time outdoors during daylight hours
Stay hydrated
Eat regular, balanced meals
Specific nutrients such as zinc and vitamin D, along with compounds found in garlic, onions and other plant foods, also help support both gut and immune health. By looking after your digestive system, you are helping to create a strong foundation for a healthy and responsive immune system throughout the winter months.
When Extra Support May Be Helpful
Individuals experiencing ongoing fatigue, recurrent infections, digestive issues, poor dietary intake, high stress levels or limited sun exposure may benefit from a personalised assessment of their nutritional status.
Testing can help identify nutrient deficiencies and provide a more targeted approach to supporting overall health and wellbeing.
Need Personalised Support?
If you'd like to optimise your nutrition and immune health this winter, a personalised consultation can help identify your unique nutritional needs and create a tailored plan that supports your overall wellbeing.
Book an appointment with Linda Dal Molin, Clinical Nutritionist and Naturopath, to develop a personalised strategy for winter wellness and year-round health.
About the Author
Linda Dal Molin, Naturopath
I'm Linda Dal Molin, a naturopath and clinical nutritionist with a postgraduate Master’s degree in Human Nutrition. I’ve used the GI-MAP test in my clinical practice for over 7 years, helping hundreds of clients uncover hidden gut imbalances and restore their health. I’ve also trained thousands of integrative health practitioners across Australia on interpreting and applying GI-MAP results — so you can be confident you’re working with someone who knows this test inside and out.
When we work together, you’re not just getting test results — you’re getting expert analysis, clear explanations, and a practical plan that works in real life.
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