Everyone wants a healthy immune system. The state of your immune system can be the difference between having to take a day off of work or missing out on an activity because you’re too sick to leave your bed. And while you can’t control every sniffle, there are many ways to support your immune system.

Taking in the right amount of vitamins and nutrients is one of the fundamental ways to keep your immune system healthy. Ideally, these vitamins and minerals would come from a perfectly balanced diet – but that’s not always possible.

Let’s break down three important vitamins and minerals to help maintain a healthy immune system:


1. Vitamin C

If you’ve ever stocked up on orange juice during cold and flu season, you probably understand, on some level, the importance of vitamin C for your immune system. The body does not make vitamin C on its own, so it must get it from food or supplements.

As the most well known immune-supporting vitamin, vitamin C supports many cellular functions of both the innate and adaptive immune systems – the body’s two central immune systems.1

Research shows that taking at least 200 mg of vitamin C per day appeared to reduce the duration of cold symptoms by an average of 8% in adults and 14% in children, translating to about one less day of illness. In order to glean these benefits from vitamin C, it is necessary to take it every day – not just when you feel a cold coming on.<small”>2


Vitamin C by Sisu

Ester-C 1000 mg: Clinically proven to stay in the body up to 24-hours, Ester-C  is better absorbed and more gentle on the stomach than regular vitamin C. This formula provides an antioxidant for the maintenance of good health, helps to prevent vitamin C deficiency, and maintain immune function.

Cold & Flu Rescue with Ester-C: Specially formulated with Ester-C and echinacea, Cold & Flu Rescue helps relieve cold & flu symptoms and upper respiratory tract infections.

Ester-C Energy BoostTM: Available in easy-to-mix drink packets, Ester-C Energy BoostTM, is a delicious way to support a healthy immune system. Each packet contains 1000 mg of Ester-C vitamin C and also includes B vitamins, electrolytes, and is hydrating.

Ester-C Powder: For a no-nonsense take on your vitamin C, Ester-C Powder has no added colours, sweeteners, or flavours and easily mixes with water or fruit juice.


2. Zinc

Zinc is an essential nutrient found in many different types of cells throughout the body. Like vitamin C, the body cannot produce zinc, and therefore must get it from food or supplements.3

After discovering zinc in the 1960s, it became evident that zinc is essential for the immune system’s function. Zinc has even become known as the “gatekeeper” of the immune system since the adequate function of nearly all immune cells is highly zinc-dependent.4 5


Zinc by Sisu

Zinc Citrate: This vegan-friendly, non-GMO, high-potency zinc helps maintain immune function.

Zinc Lozenges: Naturally flavoured lemon-lime zinc lozenges are a tasty way for you or your children nine and up to help support their immune system.


3. Vitamin D

Vitamin D is both a nutrient that we eat and a hormone made by the body. It is best known for its role in maintaining healthy bones, but recent research has shown that it also has a valuable role in supporting the immune system.6

Vitamin D may assist the immune system by helping to regulate T- and B-lymphocytes, the main cells of the immune system.7

Aptly nicknamed the “sunshine vitamin,” most of the body’s vitamin D comes from the sun’s ultraviolet rays. People who live in places where sunlight is limited in the winter or those who spend most of their time indoors likely have insufficient vitamin D levels.8


Vitamin D by Sisu

Vitamin C Plus D: This formula combines two powerful immune-supporting vitamins. One dose contains 500 mg of vitamin C and 12.5 mcg of vitamin D3.

Vitamin D: With no added sweeteners, flavours, or colours, these tiny, fast-dissolving tablets provide 1000 IU of vitamin D.


Staying strong

When life is busy, and the to-do list is neverending, supplementation can be an effective way to support your immune system. Just don’t forget the other important aspects of immune support, like exercising regularly, washing your hands, and getting adequate sleep each night. Prioritizing immune health can help you be the happiest, healthiest version of yourself.

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Always read and follow the product label. Products may not be suitable for everyone.

1 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5707683/

2 https://www.health.harvard.edu/cold-and-flu/can-vitamin-c-prevent-a-cold
3 https://ods.od.nih.gov/factsheets/Zinc-Consumer/#:~:text=Zinc%20is%20a%20nutrient%20that,genetic%20material%20in%20all%20cells
4 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5748737/
5 https://academic.oup.com/ajcn/article-pdf/68/2/447S/23189639/447s.pdf
6 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3166406/
7 https://www.puritan.com/blog/vitamins-and-supplements/supplement-spotlight/7-supplements-to-take-for-immune-support-2/
8 https://www.hsph.harvard.edu/nutritionsource/vitamin-d/