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

O2B Quercetin Plus

5.0 (1 review)

$ 59.95

O2B Quercetin Plus is our latest immune-support complex. It’s designed with COVID-19 in mind. This formula mixes Quercetin, a strong anti-inflammatory, with Zinc. Zinc helps Quercetin enter your cells to boost immune function.

It also includes NAC (N-acetyl-L-cysteine), an antioxidant hero. NAC helps keep the lungs clear and aids in making glutathione. Plus, it features immune boosters like Vitamin C and Vitamin D.

10 in stock

View cartCheckout


O2B Quercetin Plus is O2B’s newest supplement. It’s designed with COVID-19 in mind. The formula uses Quercetin’s power to move zinc into cells. Inside cells, zinc boosts your body’s immune defenses. That’s why Quercetin is called 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 highlighted the importance of this molecule for general and immune health. Addressing deficiency is crucial for supporting a healthy immune response, especially in today’s uncertain environment.

Finally, based on excellent customer feedback for our other products, we’ve included MSM here. It supports the body in many ways, 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
  • The body’s natural defense 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.

1 review for O2B Quercetin Plus

  1. Super Star Supplement

    Review by Pene (verified owner)

    This product has been super beneficial in recovery from long covid. I am now on to my 3rd bottle.

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. Required fields are marked *




* Disclaimer: Information on this website is for your general knowledge only. It is not intended to replace qualified medical advice nor intended to diagnose, treat, cure or prevent any disease. Do not disregard medical advice or postpone consultation with your health care professional because of information that you have read on this website. Always consult your doctor or other qualified health care professional regarding a medical condition. Always read the label of any natural health products you purchase and use only as directed. Consult a health care professional if symptoms persist. Customer reviews reflect individual experiences and results may vary.

Back To Top