There are plenty of great herbs and nutrients for us to explore for cold and flu, and there’s no better time than the fall and winter to support our immune system as best as possible to avoid us getting sick. Here are 5 supplements to boost your immune system!

Ever wondered which supplements are best for strengthening our immune system and preventing (or warding off) cold and flu? There are plenty of great herbs and nutrients for us to explore, and there’s no better time than the fall and winter to boost our immune system and stock up on medicine cabinet must-haves.

Be sure to check out my previous post on 5 foods to boost your immune system!




Vitamin C

Vitamin C is one of my most favourite supplements because it’s anti-everything. It’s antibacterial, antiviral, anti-inflammatory, and a potent antioxidant. It’s excellent for fighting infection and supporting your body during times of stress or illness.

Take vitamin C in divided doses throughout the day up to bowel tolerance (when you experience loose stools). However, it’s best to speak to your natural health practitioner for the appropriate dose for you.


Oil of Oregano

If you don’t yet have a bottle of oil of oregano on hand, this one is a medicine-cabinet essential. Oil of oregano is one of nature’s most powerful antibiotics and is great for the onset of an inflamed, sore throat and other bodily infections.

Oregano oil is strong! If you find it burns your mouth too much, simply add a few drops into a small glass of water. Alternately, oil of oregano can be rubbed into the bottom of the feet – this is especially useful for kids.



Probiotics are some of my favourite things in the world. Although there are plenty of food sources of friendly bacteria, sometimes a supplement providing higher doses of bacteria is required, especially in the case of digestive imbalances, a weakened immune system, frequent cold and flu, or antibiotic use.

One of my favourite probiotic brands is Genestra and their human-strain HMF line for improved colonization and withstanding stomach acid.



Zinc is a wonderful immune-supporting mineral. Not only does zinc play a role in wound healing, hormone balance, and the health of our gut and skin, it’s also excellent for promoting a healthy functioning immune system. It’s great for cold and flu and helps to reduce the severity and duration of illness.

Because zinc and copper compete for absorption in the body, zinc should be taken alongside copper if supplemented long-term. For the appropriate dose for you, be sure to speak with your natural health practitioner.


Vitamin D

Vitamin D is a whole bunch of cool things. It actually acts a vitamin and a hormone and plays many big roles in the body including calcium absorption, mental health, cancer prevention, and of course, immune function! Vitamin D helps activate the T cells in our body, which seek out and destroy different bacteria and viruses that can cause colds and flu.

Vitamin D supplementation is especially important for those of us living in cooler climates with less sun exposure throughout the year. Check out my blog post on The Importance of Vitamin D for more detailed information on all its benefits and uses.



Which supplements do you like to take to boost your immune system?

Leave me a comment below, and be sure to check out my video below on 5 immune-boosting foods: