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Key ingredients for immune health

The topic of immune health is one that has had a meteoric rise over recent years. This trend has seen the global market for immune supplements grow from AUD$27 billion in 2021 to a predicted AUD$42 billion by 2028. 

Consumers want products, especially supplements and food, that they can use to support their immune system naturally. Learn more about the key ingredients found in these products and how they combine to provide powerful immune support. 


Quercetin is a flavanol, or naturally occurring flavonoid polyphenol compound, found in several fruits and vegetables. It has antiviral and antibacterial properties.

Trials have shown that, in particular scenarios, Quercetin can reduce the incidence of viral upper respiratory tract infection. Namely, during periods of high mental stress or in the immediate post-exercise period following intensive exercise. These two scenarios are established as times when immune function is decreased and the incidence of viral infections is higher. 


Zinc has antiviral properties and also plays a role in immune function regulation. Adequate levels of zinc are also crucial for the development and function of particular cells in the body linked to immunity. 

Similarly to Vitamin D, there is widespread Zinc deficiency in our population. An Australian study conducted with adults in Tasmania found that as many as 30% of men are deficient in this important mineral. 

Research has shown that zinc can reduce the symptoms and severity of cold and flu. It has also been shown to play a role in reduced incidence of upper respiratory tract infections. 


Vitamin D is essential for normal immune function. Why? It’s an immune modulator. That’s to say it can modify the immune system to help improve its function.

The number of Australians who suffer from a Vitamin D deficiency is significant at 31%. For women, the proportion jumps to 39% with a deficiency. This number increases in winter.

One large study of more than 10,000 people found that daily Vitamin D3 oral supplementation can prevent acute respiratory tract infection. These benefits were more visible in those with a Vitamin D deficiency, although there were positive impacts for those people with normal Vitamin D levels. 


Long lauded for its antiviral properties and its ability to support the immune system, Vitamin C plays a role in enhancing various immune cell functions. 

Vitamin C supplementation has been shown to shorten and alleviate symptoms of the common cold. 

Interestingly, when taken concurrently with Quercetin, there is evidence to show that Vitamin C may have a synergistic effect, increasing the efficacy of the Quercetin to optimise its antioxidant and antiviral effects. 

IMUNI Immune Defence


The first in a range of practitioner-quality health supplements, Immune Defence from IMUNI draws on scientific evidence on the efficacy of the above ingredients. The powerful combination of nutrients creates a nutraceutical that contains optimal ingredients at the right therapeutic doses.

This blend of vitamins, minerals and flavonoids is specifically formulated to prevent respiratory infections and reduce the symptoms and severity of common colds and flu. It works by replenishing vital nutrients and minerals to protect against oxidative stress in the event of infection. It also helps to neutralise cell-damaging toxic chemicals to enhance the body’s immune response.  

Immune Defence is a plant-based supplement. It contains Vitashine™, the world’s only Vegan Society & Vegetarian Society registered, 100% plant-sourced Vitamin D3 ingredient. It also uses the purest and most effective ingredients, including QU995™ The World’s Purest Quercetin™ with superior bioavailability and unmatched purity. 

For more information regarding the science behind these nutrients, you can visit IMUNI’s website. The IMUNI team have also come up with a variety of ways to engage your consumers with evidence-based nutrition and healthy living tips via their blog ‘The Journal‘ and their Facebook group. The brand is also active on social media across Facebook, Instagram and Youtube.


When your customers are looking for products to support their immune health, a high-quality product such as IMUNI Immune Defence, is the answer they are looking for. Immune Defence is available alongside a wide range of immune-supportive products in the Unique Health Products online store. You can shop online with us 24/7, or call our friendly sales team on 1800 787 904. If you don’t have a wholesale account with us yet, you can register for one here