Registered dietitian Linda Drummond explains why two commonly understood ways of boosting the immune system are actually myths…

While trying to avoid winter colds and flu, we’re bound to fall for a few myths about boosting the immune system.

This is because the immune system is one of the most complex networks in the body and is still far from being completely understood. As pieces of research are added to the picture, myths about the immune system arise in the gaps.

As a dietitian and spokesperson for the Association for Dietetics in South Africa (ADSA), Drummond is qualified to help us sort fact from the fiction.

MYTH #1 ‘All I need is a multi-vitamin or more Vitamin C’

This is probably the most common misconception – that nutritional supplements, or greater doses of one particular vitamin, can be an effective protective solution.

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“While Vitamin C does play an important immune-boosting role, research has shown that supplementing with Vitamin C does not actually help you to avoid developing colds and flu.  Studies have found that in some, but not all cases, Vitamin C, as an isolated strategy, may help to reduce the duration of the illness, but not protect you from it,” explains Drummond.

“Nutritional supplements can play an important role in supporting improved health for vulnerable people, such as children, the elderly, pregnant women and those with health conditions that compromise their immunity. However, others should rather aim to get their daily intake of immune-boosting micronutrients from their food.”

She recommends eating a variety of healthy foods every day, including lots of vegetables and fruits, whole grains, dairy, meat, chicken or fish, beans and lentils, and plant fats provides not just Vitamin C, but also the other immune-boosting nutrients such as Vitamins A, D and the Bs, as well as trace elements such as zinc and selenium.

“What you eat, not what you supplement with, is what is most important to build your defences against winter germs.” – Linda Drummond,  registered dietitian

“You cannot expect that if you eat poorly, but take a supplement, your immune system will still be highly effective. What you eat, not what you supplement with, is what is most important to build your defences against winter germs,” says Drummond.

Related: Junk food disturbs a healthy immune system

She says that while supplements are not the antidote to unhealthy eating, they can help to fill in gaps in an otherwise healthy eating plan, but you should get a dietitian’s advice on this.

“We should all be clear that when it comes to what we consume and our immune systems and our health, there is simply no substitute that we know of at this time that beats the effectiveness of eating a variety of quality, minimally processed foods, which are mostly plant-based, every day. It is the way to go.”

MYTH #2 ‘All I have to do is focus on the food I eat and the supplements I consume’

Drummond says this is not true.

“While healthy eating is a vital immune-boosting strategy, and nutritional supplementation may be necessary for you if you have a compromised immune system, it remains one critical aspect of having an effective immune system during the challenging winter months. But, it is a complex system and other factors are at play. 

Scientific research has shown that:

  • Sufficient sleep is also important to support the immune system;
  • regular exercise is a powerful immune system booster;
  • a positive mental and emotional state strengthens your resistance to disease

What this means is that during winter, if we want to effectively develop our resistance to illnesses, we need to keep our focus on our whole body and our entire lifestyle, not only one part of it.”

She says we must get enough quality rest balanced by getting daily physical exercise. We also need to take regular action to manage stress, develop mindfulness and be in charge of our disruptive emotions.

“Sleepless nights; days of inaction and stress that is off the charts for most of the time will batter our immune system as surely as nutrient-poor food and other poor eating habits,” says Drummond.

Proven ways to boost your immune system

The bottom-line is that you should boost your immune system this winter, and, based on real evidence, you can do that each day by:

  • Eat healthily by focusing on a variety of minimally processed quality foods from the different food groups to ensure your body gets all the nutrients it needs. Aim for at least five colourful vegetables and fruit daily
  • Say no to high energy, sugar, salt and fat foods. This includes takeaways, sweetened drinks, sweets, chips, cakes, biscuits and all the other highly-processed options
  • Get enough sleep to wake up refreshed and strong
  • Aim to be active every day
  • Let go of stress and anxieties
  • Wash your hands often with soap and water for at least 15 seconds. When you are not near a sink, use a hand sanitizer

While All4Women endeavours to ensure health articles are based on scientific research, health articles should not be considered as a replacement for professional medical advice. Should you have concerns related to this content, it is advised that you discuss them with your personal healthcare provider.