skip to Main Content
Free shipping in New Zealand   |
  Freephone  0800 880 868

O2B Quercetin Plus

Rated 0 out of 5
(be the first to review)

$ 59.90

O2B Quercetin Plus is our newest immune supporting complex, designed with COVID in mind. This formulation combines the potent anti-inflammatory Quercetin with Zinc to assist it into your cells where it supports your immune function. The antioxidant and mucolytic superstar NAC (N-acetyl-L-cysteine) is also included to support normal clear lungs and support glutathione synthesis, along with immunity superstars like Vitamin C and Vitamin D.

45 in stock

View cartCheckout


O2B Quercetin Plus is O2B’s most up to date supplement complex designed with COVID in mind, capitalizing on Quercetin’s ability to push zinc across the cell wall into cells where it can most effective for supporting your body’s natural immune defences – this is why Quercetin is known as a zinc ‘ionophore’. Quercetin is  also a natural antioxidant and anti-inflammatory compound, and combines particularly well with Vitamin C providing a synergy for additional immune support.

NAC (N-acetyl-L-cysteine) is a well-recognised supporter of a healthy immune system, normal respiratory function, cardiovascular health and natural detoxification function. This excellent all-rounder is extremely popular at the moment due to its added ability to support healthy lungs and the normal clearance of mucosal lung secretions.

No immune support complex would be complete without the superstar that is Vitamin D. COVID has shone the spotlight on the importance of this molecule for general and immune health, where deficiency should be addressed to support a healthy immune response, particularly in the current uncertain environment.

Finally, MSM has proven itself in our other products based on excellent customer feedback and so is included here to support the body on many levels including the detoxification process and healthy liver function.

All of these ingredients combined provide synergy to boost and maintain a healthy, natural immune competency.


  • Healthy immune responses
  • Body’s natural defence systems


Each capsule contains:

  • Quercetin   300mg
  • MSM               200mg
  • NAC                200mg
  • Vitamin C    100mg
  • Zinc                     5mg
  • Vitamin D     2.5mg  (equiv. 250IU)



Wheat, gluten, corn, yeast, artificial flavours or preservatives.

DOSE: Take 1 – 3 capsules together with food per day or as directed by your healthcare practitioner.

CAUTION: If taking prescription medication, pregnant, nursing or you have known ingredient sensitivities please consult your health care professional before taking this product.


There are no reviews yet.

Leave a customer review

Please note that under the NZ Dietary Supplements Regs 1985 we are not able to publish Testimonials that suggest that any of our natural supplements can diagnose, treat, cure, change or prevent any disease, disorder or chronic condition. Please be mindful of these restrictions when you leave your review, avoid the use of words like ‘treat, ‘cure’, ‘pain’, ‘fix’ or the names of specific conditions or diseases. We welcome recommendations and comments about our customer service, delivery, packaging or how much we care for you, naturally :-)
Thank you for your feedback!

Your email address will not be published.

Back To Top