IMUNI Immune Defence Quercetin, Zinc, Vitamin C, Vitamin D3 60 Capsules

Save $8
IMUNISKU: 80010440

$41.99 $49.99


Pre-Order Only - Back in stock Nov TBC


  • Immune system health
  • Relieves symptoms of cold & flu
  • Respiratory support
  • Vegan & Vegetarian
  • Dairy & Gluten Free
  • Pure effective ingredients

Each vegan capsule contains therapeutic doses of:
Vitamin D3, Vitamin C, Zinc, Quercetin.

Helps relieve symptoms of common colds and flu. Regular use may reduce the occurrence of common colds.

IMUNI Immune Defence is a unique formulation designed to stimulate a healthy immune response and support the immune system to fight illness. Helps relieve symptoms of common colds and flu. Regular use may reduce the occurrence of common colds.

  • Evidence-based health supplements + education
  • Science-backed ingredients with doses at therapeutic levels
  • High quality, pure + effective ingredients
  • Optimal ingredient formulations
  • 100% Australian Made + Owned

Quercetin is a naturally occurring antioxidant found in several plants. In vitro (i.e. laboratory-based) and animal studies have demonstrated Quercetin’s antiviral and antibacterial properties. Human clinical trials have shown that Quercetin can reduce the incidence of viral upper respiratory tract infection in the immediate post-exercise period following intensive exercise and in individuals suffering from high mental stress, conditions in which it is known that immune function is decreased and the incidence of viral infections is higher(1-4).

Zinc is a key ingredient that has been selected for its antiviral properties and its role in the regulation of immune function. A substantial amount of scientific literature has documented the beneficial role of zinc in fighting respiratory tract infections such as common cold and flu. The World Health Organisation (WHO) estimates that up to one third of the world’s population is deficient in zinc. An Australian study of 497 Tasmanian adults showed that zinc deficiency was present in 18% of men over the age of 50 and 30% of men over the age of 70(5). We have intentionally included high doses of elemental zinc in IMUNI Immune Defence to boost zinc levels, to enhance the antiviral effects of Quercetin and to improve viral defence.

Vitamin C has long been known for its antiviral and immune boosting properties. While a balanced diet can certainly assist in maintaining healthy intake, viral infections are associated with an increased metabolism of Vitamin C and reduced circulating levels. Regular supplementation of Vitamin C during and immediately prior to viral infection can therefore assist in maintaining effective immune function. Vitamin C has also been shown to improve the bioavailability of Quercetin by helping recycle Quercetin into its active form thereby optimising its antioxidant and antiviral effects.

Vitamin D plays an important role in the immune response as an immune modulator. A large study of over 10,000 patients enrolled in randomised clinical trials demonstrated that daily oral supplementation with vitamin D3 can prevent acute respiratory tract infection. While effects were more pronounced in patients deficient in vitamin D, even those people with normal blood levels still gained some benefit from vitamin D3 supplementation(6). In Australia, Vitamin D deficiency is common and affects nearly one-third of adults aged over 25 years of age(7).



  • Necessary for normal immune function
  • An important immunomodulator (refers to its ability to modify the immune response, leading to improved immune system function)
  • Help maintain adequate vitamin D levels in the body
  • Help prevent vitamin D deficiency


  • Supports healthy immune system function
  • Assists in maintaining healthy levels of vitamin C in the body during infection


  • Help maintain adequate zinc levels in the body
  • Help prevent dietary zinc deficiency
  • Essential for normal immune system function
  • Assists in regulating the proliferation, maturation and physiological function of important immune cells in the body


  • Quercetin is a flavanol (flavonoid polyphenol) found in fruits and vegetables.
  • Flavonoids are natural compounds obtained in the human diet that has been widely recognised for their various health benefits
  • May assist in supporting a healthy immune system response to infection

      IMUNI Immune Defence is suitable for: 

      For adults only


      Take one (1) capsule twice daily with food or as recommended by your healthcare professional.

      Store below 30°C in a cool, dry place away from direct heat and sunlight. Do not use if the seal on the cap/lid has been broken. Shelf life 24 months from the date of manufacture.


      Active ingredients per Vegan capsule: Quercetin 250 mg, Colecalciferol Vitashine™ (Vitamin D3 500 IU) 12.5 mcg, Zinc gluconate 153.14 mg (equiv. Zinc 20 mg), Ascorbic acid (Vitamin C) 250 mg.

      Free from Animal Products, Artificial Colours, Flavours or sweeteners, lactose-free, dairy-free, gluten-free, nut-free, no added sugar,vegetarian and vegan friendly, non-MGO

      Warning and Disclaimers:

      Adults only. Contains zinc which may be dangerous if taken in large amounts or for a long period. Vitamin and mineral supplements should not replace a balanced diet. If symptoms persist, talk to your healthcare professional.


      Under what circumstances should I take IMUNI Immune Defence?

      Scientific evidence has shown the various components of IMUNI Immune Defence may be beneficial for prevention and treatment of respiratory tract infection, by reducing the incidence of infection as well as severity and duration of illness(2-5). We therefore recommend taking IMUNI Immune Defence to either prevent infection in times of higher incidence or to treat infection by taking it immediately at the onset of symptoms. Some times that you might consider using IMUNI Immune Defence for prevention of respiratory tract infection are listed here:

      • For up to three months over the peak cold and flu season
      • When exposed to a close friend or family member who is showing symptoms
      • During periods of high stress, for example, following periods of intensive exercise or when under mental stress
      • If affected by a chronic medical condition that might suppress your immune system*

      *we recommend you talk to a doctor if affected by a medical condition; if using regular medications; or if you are pregnant or lactating. You should also talk to your doctor if symptoms are severe or persist despite treatment.

      How long should I take to see the results?

      For IMUNI Immune Defence, research tells us that it may take up to a week for vitamin D3 to be converted in the liver to the active form of Calcifediol, and it may take several weeks for some people to replenish healthy levels of vitamin D, especially if levels are low to begin with. On the other hand, taking regular quercetin, vitamin C and zinc may provide more immediate immune defence, which is why our Immune Defence product is an excellent choice to enhance your immune system.

      Why do I need to take IMUNI defence twice a day?

      The half-life of Quercetin in the body has been reported as highly variable, ranging anywhere from 11 to 28 hours(3). This means that after a single dose, it could take as little as 11 hours to eliminate half this dose from the body. To ensure that you have sufficient amounts of Quercetin in your body around the clock, we recommend you take one capsule of IMUNI Immune Defence with breakfast and one capsule with dinner.

      How much Quercetin should I take? Should I take it with food?

      Taking into account safety considerations and scientific literature reporting a therapeutic daily dose of 500mg, this is the recommended daily dose of Quercetin in IMUNI Immune Defence which we recommend to be taken in separate doses of 250mg twice a day – that is, one capsule of IMUNI Immune Defence with breakfast and one capsule with dinner. Bioavailability of Quercetin may be enhanced when taken with vitamin C and absorption may be improved by taking Quercetin with food given that Quercetin is soluble in fat(2,8).

      Is IMUNI defence safe?

      Safety is our number one concern. IMUNI Immune Defence contains zinc which may be dangerous if taken in large amounts or for a long period. High doses of zinc can interfere with the absorption of other ions such as copper and can cause minor symptoms such as nausea(9,10). If you intend to use this product for periods longer than 12 weeks, we recommend you discuss this with your doctor. Quercetin can interfere with the metabolism of certain medications. Refer to our fact sheet for more information on precautions, potential side effects and drug interactions.

      Can I use it if I'm taking other medication?

      The answer is yes, but check with your doctor about any potential interactions. You can also have a read of the fact sheet on our products page to learn more about side effects and drug interactions.

      Further information:

      • Vitamin C increases the bioavailability of Quercetin(2)
      • In order to consume the same amount of Quercetin found in a single daily dose of IMUNI Immunity, you would have to consume more than 6.5 kg of red lettuce or 1.2kg of red onion every day!(11)

      Download Resources:

      FAQs - IMUNI Immune Defence

      More from:


      Cold & Flu, Immunity & Allergy

      What ingredients are in IMUNI Immune Defence?


      Payment & Security

      American Express Apple Pay Google Pay Mastercard PayPal Shop Pay Visa Zip

      Your Payment Information is Processed Securely. We do Not Store Credit Card Details Nor Have Access To Your Credit Card Information.

      You May Also Like

      Recently Viewed