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How to Nurture Your Immune System This Winter

ESTIMATED READING TIME 4 MINUTES

boost immune system in winter

As winter approaches, do you find you catch every cold or flu bug going? Do your little ones pass coughs and sniffles around as if they were toys? Although it may seem like it’s just bad luck whether or not you succumb to a bacterial or viral infection, in truth it’s all about your immune system and how effectively it’s able to protect you.

Your immune system is your invisible defence against bacteria and viruses, so given a little support it can work harder for you. Read on to discover how to nurture your immune system this winter.

Why is Your Immune System so Important?

white blood cells attacking invaders

Your immune system is your internal protection against invaders. It works tirelessly to prevent bacteria and viruses from getting into your body, and if they breach those defences, it will hunt them down and destroy them.

Your immune system is an army of white blood cells patrolling your body ready to identify any threats and react accordingly. They do this 24/7, usually without you being aware of their work.

How your immune system is functioning will affect whether you suffer from colds and flu in the first place, how severe your symptoms are, and how long the infections hang around.

Where is Your Immune System?

The white cells patrolling your body in search of invaders travel around in your bloodstream to wherever they’re needed. But it might surprise you to learn the vast majority of your immune system is found in your gut. The beneficial bacteria naturally resident in your digestive system, known as your microbiome, teach your immune cells what is dangerous and what isn’t. This ensures your internal army reacts appropriately to harmful substances and doesn’t attack harmless substances.

If your immune system mistakes innocuous particles like pollen for invaders, allergies will be the result, a common issue over the summer for many people. Sometimes, immune cells attack parts of the body, and this type of immune dysfunction is called autoimmunity. Examples of autoimmune diseases include lupus, rheumatoid arthritis and Type 1 diabetes.

The bacteria in your gut also control the production and development of white blood cells, so they’re responsible for the ongoing effectiveness of your immune system, too.

Quick Tips for a Healthy Immune System

fermented foods for healthy immune system
  • Eat plenty of fibre from a range of unprocessed, plant-based foods. This provides the fuel for your gut bacteria to carry out their beneficial work. Fermented foods like kombucha, kefir, natural yoghurt, miso and sauerkraut naturally contain healthy bacteria, helping your microbiome to thrive.
  • Immune cells need food too. Nutrients important to help them function well are vitamin C, zinc, vitamin D and omega 3. Humans are unable to store vitamin C so you need a constant supply throughout the day. It’s present in plant foods like kiwi, yellow peppers, broccoli, kale and citrus fruits. Try to eat a good variety of different coloured plant foods every day. The demand for vitamin C from your immune cells can be high at this time of the year because they’re working hard, so you may benefit from a supplement.
  • Avoid sugar. Although when you’re feeling poorly it’s tempting to reach for a sweet treat, sugar doesn’t do your gut bacteria any favours at all. Meanwhile, studies have found sugar can depress your immune system by reducing the activity of specific immune cells tasked with gobbling up bacteria and other foreign particles.
  • Feast on garlic – not only will it keep vampires away, but it’s been found to support the activity of your immune cells, it’s antiviral and can reduce the duration of cold and flu symptoms 1.
  • Aim to manage your stress. Ongoing stress massively impacts the functioning of your immune system by suppressing the activity of infection-fighting cells.
  • Moderate exercise supports your immune system by boosting levels of infection-fighting white blood cells. Try to exercise outside if you can, because sunlight stimulates the production of vitamin D, in short supply over the winter.
  • Establish a healthy sleep routine. This means turning in at roughly the same time each evening and getting up at around the same time each morning, weekends included. If you have trouble dropping off, relax in an Epsom salts bath and bin the caffeine.
  • Echinacea extract has been used for many years to support the immune system, and some research has found it can boost the production of certain immune cells.
  • Extract of black elderberry has been found in studies to reduce the duration of cold and flu symptoms 2.

You are unique – the above suggestions are general guidelines only. An in-depth consultation with a Functional Medicine practitioner will detect any nutrient deficiencies and assess how your lifestyle and genetic inheritance may be impacting your immune health. Following this, a personalised programme will support your immune health throughout the winter and beyond.

References

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Are you concerned about your immune system? Why not book a free 15-minute discovery call to see if Functional Medicine is for you.

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