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Quercetin & Rutin Supplements

Quercetin and Antivirals

3/31/2023
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Be aware that quercetin might reduce the effectiveness of some antivirals, including an antiviral in Paxlovid used to treat COVID-19. Get the details in the Concerns and Cautions section of our Quercetin Supplements Review, which includes information about other potential interactions with quercetin, as well as our Top Picks among quercetin supplements.

Also see our CL Answer about Supplements for COVID-19.

Quercetin for Seasonal Allergies?

7/19/2022
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Did quercetin improve nasal and eye symptoms among people with seasonal allergies in recent study? Find out in the Seasonal Allergy section of our Quercetin Supplements Review.

Quercetin From Food or Supplements?

6/01/2022
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Is it more cost effective to get quercetin from food (as rutin) than supplements? See our answer in the Quercetin Review.

Most Quercetin Brands Fail Test

5/13/2022
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Twenty out of 24 brands of quercetin purchased on Amazon contained much less quercetin than listed in a recent analysis. For details by brand, see the Quality Concerns section of our Quercetin Review.

Quercetin for Severe COVID?

12/06/2021
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Does quercetin help people with severe COVID-19? See what a recent study suggests in the Viral Infections section of our Quercetin Supplements Review. Also see our Top Picks for quercetin.

Quercetin & COVID

11/04/2021
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Find out if quercetin helped people with early-stage COVID-19 in a recent study. Details are in the Viral Infections section of our Quercetin Supplements Review, which includes our test results and Top Picks among quercetin supplements.

Is Quercetin Safe?

3/30/2020
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Quercetin has been proposed as a treatment for a range of medical conditions, including COVID-19, but is it safe? Find out what studies have found, including results of a recent, small clinical trial, in the Concerns and Cautions section of the Quercetin Supplements Review. Also see our Top Picks for quercetin.