Quercetin for Immunity

Written by Brenton Wight, Health Researcher
Copyright © 1999-2021 Brenton Wight. All Rights Reserved.
This site is non-profit, existing only to help people improve health
Updated 2nd January 2021

COVID-19 is spreading fast in many countries, so it is becoming vital to strengthen our natural (innate) immune system.
Of course, a healthy diet lowers inflammation, and immunity improves with good sleep, minimal stress, exercise, vitamin C, and vitamin D from sun or supplements.

When the immune system is working normally, an immune response to any infection causes inflammation in the action against the pathogen, which is fine, but in people with a dysfunctional immune system, the system goes into overdrive, over-producing immune cells and leading to a “cytokine storm” that can cause severe or even fatal breathing difficulties with Coronavirus, flu, pneumonia and other infections.
If we are already suffering from inflammation, diabetes, obesity, leaky gut, cardiovascular or lung disease, we are much more susceptible to cytokine storms.
Several foods and supplements help strengthen the immune system and reduce inflammation, without overstimulating the immune system. Along with Vitamin D3, Zinc, and others, Quercetin is less well-known, but extremely important.

What is Quercetin?

Quercetin is a bioflavonoid, an anti-inflammatory and antiviral compound, found in many foods.
It is also a STAC (sirtuin-activating compound). Sirtuins slow down cell aging.
Highest concentrations are found in red onions and apples. So if we eat an apple a day to keep COVID-19 away, adding a red onion will help even more!
Other quercetin-rich foods include berries, green tea, elderberry, radish leaves, rocket, fennel, carob, red leaf lettuce, watercress, hawthorn leaves, asparagus (cooked), kale, cocao powder, chia seeds, buckwheat, red wine and many more.

A computer modeling analysis at the University of Tennessee and Oak Ridge National Labs showed which compounds or supplements may help prevent Coronavirus from binding to our cells, which is how Coronavirus gets into to our cells to reproducing. Once bound to a cell, it uses the ACE2 (Angiotensin Converting Enzyme) receptor to enter the cell, start reproducing and impacts the respiratory system.
The Tennessee analysis found that Quercetin is one of the top 5 virus-fighting natural compounds.

Other Quercetin Benefits

– Reducing allergic reactions
– Reducing free radicals that cause aging and poor health
– Proven benefit treating Ebola and Zika and other viruses

How much quercetin should I take?

Most research studies use a dose of 500mg to 1,000 mg a day.
Often mixed with Bromelain (a digestive enzyme)
My recommendation:
Quercetin and Bromelain

Other Supplements for Immunity
Zinc is proven to reduce the activity of coronavirus as well as influenza and the common cold. Typical dose is 15mg to 30mg daily to keep the immune system strong, but do not overdose. Zinc is used up by the body when fighting a disease (or even stress) so some extra zinc, say 30mg to 60mg daily may be advised during a short term illness, but long-term always revert to a standard dose.
A chelated form of Zinc such as this Zinc Chelate is highly recommended.

Vitamin C has proven benefits for reducing inflammation and fighting viruses. Studies show that vitamin C shortens the incidence, frequency, duration and severity of the common cold (a type of corona virus) and pneumonia. Vitamin C is a water-soluble vitamin, meaning it is flushed through the body and excreted in urine, so is best taken every day, and preferably several times daily. Can cause stomach upset in high doses, say over 9,000 mg daily, but doctors can administer 50,000 mg or more by IV for a serious condition. Anyone who has a serious case of COVID-19 should demand this.

Vitamin D3 has immune-boosting benefits, plus the ability to moderate auto-immune conditions that cause cytokine storms. 5,000 IU of Vitamin D3 also helps with weight loss and building strong bones, but should always be taken with Vitamin K2 MK7.
Doctors say 1,000 IU of vitamin D3 is all we need, but for a strong immune system, most people need 5,000 IU or more. Read my Vitamin D3 article for more in-depth info.

Other Immune-Building Foods
Foods to consider:
– Garlic (or at least onions, especially red onions with Quercetin)
– Ginger
– Berries og all kinds
– Green tea
– Grass fed butter
– Grass fed beef



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