IMUNI Immune Defence bottle


The recommended daily dose of IMUNI Immune Defence (two capsules) contains:

  • 1000IU Vitamin D3
  • 40mg Zinc
  • 500mg Quercetin
  • 500mg Vitamin C

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

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Orders will be despatched November 2021

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Immune System Health
Vegan and Vegetarian Friendly
Relieves Symptoms of Cold and Flu
Dairy and Gluten Free
Respiratory Support
Pure and Effective Ingredients

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

IMUNI Immune Defence is listed in the ARTG, AUST L 353362

What is unique about this combination?

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).


Recommended Daily Dose: 2 Capsules
Doses Per Bottle: 30

Ingredients and Amount Per Daily Dose (2 capsules):

  • VITAMIN D3 (Vitashine™ 1000 IU)
  • VITAMIN C (500 mg)
  • ZINC (40 mg)
  • QUERCETIN (QU995™ 500 mg)

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.

Vitashine™ is the world's only Vegan Society & Vegetarian Society registered 100% plant-source Vitamin D3 ingredient. Learn more

QU995™ The World’s Purest Quercetin™
Superior Bioavailability. Unmatched Purity.


Directions for use:
Adults: Take one (1) capsule twice per day with food.
Children over 12 years of age: Take one (1) capsule per day.

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

Warnings: 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.

Does not contain



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 it take me to see results?

It may take several weeks for some people to replenish healthy levels of vitamin D and zinc, especially if levels are low to begin with. This is why we recommend taking IMUNI Immune Defence on a regular daily basis to replenish vital nutrients for optimal immune system health.

Why do I need to take IMUNI Immune 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 Immune 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 absorption of other ions such as copper, and can cause minor symptoms such as nausea(9,10). 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 your products if I’m taking other medications?

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.

Did you know?

  • Vitamin C increases 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)

Shipping + Delivery

Your order will be despatched the next day if placed before 2pm (AEST). We ship to most countries worldwide.

Australian Shipping

Standard: (2-8 Business Days) $9.95
Express: (1-4 Business Days) $12.95
Free Standard Australian Shipping for orders over $60.

New Zealand Shipping

Standard: (2-8 Business Days) $20
Free Standard International Shipping for orders over $60.

International Shipping

Standard Shipping: (6-15 Business Days) Calculated at Checkout
Free Standard International Shipping for overs over $250

For more information on shipping please read our Shipping + Returns policy

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Recyclable + Sustainable

IMUNI Immune Defence are contained in glass bottles. In our journey for sustainability we've found it is beneficial to store our health supplements in glass rather than plastic. Glass is a material that will protect your product from moisture and can be recycled forever with no loss in quality or purity(22).


  1. Heinz S, Henson D, Austin M, Jin F, Nieman D. Quercetin supplementation and upper respiratory tract infection: A randomized community clinical trial. Pharmacological Research [Internet]. 2010;62(3):237-242. Available from:
  2. Li Y, Yao J, Han C, Yang J, Chaudhry M, Wang S et al. Quercetin, Inflammation and Immunity. Nutrients [Internet]. 2016;8(3):167. Available from:
  3. Nieman D, Henson D, Gross S, Jenkins D, Davis J, Murphy E et al. Quercetin Reduces Illness but Not Immune Perturbations after Intensive Exercise. Medicine & Science in Sports & Exercise [Internet]. 2007;39(9):1561-1569. Available from:
  4. Nieman D, Henson D, Maxwell K, Williams A, Mcanulty S, Jin F et al. Effects of Quercetin and EGCG on Mitochondrial Biogenesis and Immunity. Medicine & Science in Sports & Exercise [Internet]. 2009;41(7):1467-1475. Available from:
  5. Beckett J, Ball M. Zinc status of northern Tasmanian adults. Journal of Nutritional Science [Internet]. 2015;4. Available from:
  6. Martineau A, Jolliffe D, Hooper R, Greenberg L, Aloia J, Bergman P et al. Vitamin D supplementation to prevent acute respiratory tract infections: systematic review and meta-analysis of individual participant data. BMJ [Internet]. 2017;:i6583. Available from:
  7. Daly R, Gagnon C, Lu Z, Magliano D, Dunstan D, Sikaris K et al. Prevalence of vitamin D deficiency and its determinants in Australian adults aged 25 years and older: a national, population-based study. Clinical Endocrinology [Internet]. 2012;77(1):26-35. Available from:
  8. Guo Y, Mah E, Davis C, Jalili T, Ferruzzi M, Chun O et al. Dietary fat increases quercetin bioavailability in overweight adults. Molecular Nutrition & Food Research [Internet]. 2013;57(5):896-905. Available from:
  9. Science M, Johnstone J, Roth D, Guyatt G, Loeb M. Zinc for the treatment of the common cold: a systematic review and meta-analysis of randomized controlled trials. Canadian Medical Association Journal [Internet]. 2012;184(10):E551-E561. Available from:
  10. Office of Dietary Supplements - Zinc [Internet]. 2020. Available from:
  11. D'Andrea G. Quercetin: A flavonol with multifaceted therapeutic applications?. Fitoterapia [Internet]. 2015;106:256-271. Available from:



  • 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 have been widely recognised for their various health benefits
  • May assist in supporting a healthy immune system response to infection