• Dianne Levine

How to Boost Your Immune System


If you want to invite colds and flus into your body, having a piece of candy, chocolate, cake or alcohol with or after every meal is the way to do it. Excess sugar is linked to a wide variety of health problems, including blood sugar imbalances, diabetes, obesity, tooth decay and cancer. Sugar dampens our immune systems, leaving us more susceptible to germs and illnesses.

You've probably heard that Vitamin C is an essential vitamin to support the immune system. In the 1970's, researchers found out that vitamin C was needed by white blood cells so that they could devour viruses and bacteria. Glucose (aka sugar) and vitamin C have similar chemical structures, so when the sugar levels go up in the body, they compete with Vitamin C for entry into the cell. Unfortunately, the insulin receptors on our cells favour glucose over Vitamin C, so if there is more glucose around, there is going to be less vitamin C allowed in. It doesn't take much: a blood sugar value of 120 reduces the ability of our cells to eat bacteria by 75%.

While there may be some benefits to certain types of alcohol in limited amounts, for the most part, alcohol compromises the immune system and leaves us more susceptible to infections. And most of us aren't having the occasional glass of organic wine - many are boozing it up on the regular.

So when you eat sugar or alcohol, think of your immune system slowing down to a crawl.


You can't make up sleep. Not really. You can sleep in, you can rest, but insufficient sleep will begin to weaken immune function.  When we have the flu, we feel our best in the morning, after we have rested. Symptoms tend to worsen by afternoon and then we improve again after good sleep.

Does sleep actually suppress infection and boost immune function? Researchers have discovered that when animals are sleep deprived, they become more susceptible to microbial and bacteria growth, which can lead to illness and infection.You might be thinking, 'But Meghan! The flu is a virus, not a bacteria'. True but weakened immune function is weakened immune function, no matter how it gets weakened.

A good night's sleep doesn't just benefit animals - it helps us, too. Evidence shows that sufficient sleep and a regular circadian rhythm boost immune function and help filter T-cells into our lymph nodes. Our lymphatic system is essential for eliminating wastes and defending our bodies from external invaders, so the moral of the story is a good night's sleep is an important element to prevent colds and flus.


Chronic stress impairs the immune system's capacity to respond to glucocorticoid hormones that normally are responsible for terminating an inflammatory response following infection and/or injury. Psychological stress (which, lets face it, is largely self-induced) raises catecholamine ('fight or flight') hormones, which suppress the immune system and raise the risk of viral infection.

For example, researchers have shown that students taking exams have a lowered immunity compared to non-exam time. Also, a meta-analysis of 300 studies over 30 years concluded that chronic stress alters the immune system and can leave us more susceptible to disease.

So if you keep saying yes to everything, do more than anyone believes is humanly possibly and then continue telling everyone all about how stressed you are, you are shoe-in to win the Flu Season Olympics.


Germs are everywhere during cold and flu season! You can't control what other people do, but you can control your own behaviour. Whether you're at a restaurant, on public transit, at the gym or out with friends, ensure you wash your hands regularly - especially when you're eating or touching your face.

Rinsing your nasal passages with warm water and salt using neti pot can help to wash out infections and reduce allergy symptoms. Having a good sweat will help you excrete toxins through your skin and raise your core body temperature, which will kill off potential pathogens. I like to use an infrared sauna, but regular exercise or hot yoga can also do the trick.


A good diet loaded with plant-based foods is one of your best defences to prevent colds and flus. And I don't just mean a healthful diet the moment you feel a cold coming on - I'm talking about a continual commitment to eating high-quality produce, drinking plenty of water, consuming healthy fats, and loading up on clean proteins (protein is an essential part of our antibodies, and they assist with healing and repair).

Foods with Vitamin C (cauliflower, bell pepper, dark leafy greens, citrus), Vitamin D (eggs, fish) and probiotics (such as fermented foods) will also help to boost the immune system and keep your gut healthy. Since about 70% of the immune system lives in the gut, good digestion is crucial to healthy immunity.

For more immune-boosting power, try:

· Elderberry Syrup

· Cold and Flu Turmeric Tonic

· Healing Ginger Tea

· Simple Bone Broth Recipe

· Fast + Easy Miso Power Soup

Armed with these tips and tools, colds and flus won't be awful things that just 'happen to you'. Instead, you can empower yourself to prevent colds and flus every day of the year.

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