17 Comments

Dear Dr. Grouf:

I searched and I can not find any quercetin with propolis and rutin. I could not find any quercetin that stated the word natural.

Do you have any suggestions on where i can quercetin that meets your specifications?

thanks Jim Krilich jim16640@gmail.com

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Dr. Mercola makes the right kind.

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Thank you! Quit taking the bottle we had 6 months ago when I noticed the Jarrow brand is made in CHINA

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Bee Propolis and Rutin are much better

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Thank you for the education on this.

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Uuggg I just restocked.

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Any references on this?

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no, just personal experience and consistency, I never recommend synthetics for anything,they always cause problems

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What if the dihydrate form is from Sephora japonica bud extract? Is that natural?

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its not dihydrate if its from Sephora yours might be a blend

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This is what my quercetin says, but it says as quercetin dihydrate, so is it okay or not? TY!

High concentrated 95% pure 2:1 quercetin extract capsules. Natural soy-free sophora japonica source. Highest bioavailable dihydrate form. Rich source of antioxidants and flavonoids.

240 capsules per bottle. 2 capsule serving size. 1,000mg dose with 500mg per capsule. Up to a 4-month supply.

A natural herbal ingredient that provides important phytonutrients for promoting year round immune support in both men and women.

The sophora japonica plant naturally contains an abundance of water soluble quercetin properties and offers it in its most biologically activated form for maximized results.

Authentic non-GMO quercetin powder capsuled supplements. Contains pure ingredients free of soy, dairy, gluten, preservatives, wheat, and tree nuts. Product is produced in California and 3rd party lab tested for safety and potency.

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Mine is NOW brand. Quercetin with Bromelain. It doesn't say dihydrate on it, but it also does not say Certified Natural.

I know my nutritionist friend often recommends this brand. Do you have any info on it? Or is there a brand that is definitely Certified Natural?

Thanks!😊

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Good to know.

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Also Quercetin from Sophora japonica, I found it to increase my tinnitus symptoms.

After some research I found a study where they found Quercetin to be a L-type Ca2+ channel activator. *1

Another study on Tinnitus suggests "T-type calcium channel blockers were found to be ineffective in treating tinnitus, while L-type calcium channel blockers lead to significant improvements." *2

Could that be an explanation as to why Quercetin seem to worsen my symptoms?

*1 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1573296/

*2 https://ideaexchange.uakron.edu/honors_research_projects/1460/

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I have 2 bottles here. One from local health food store- activated quercetin says “quercetin”. Is that good to keep? The other One from Whole Foods clearly says “quercetin (quercetin dihydrate)” so I threw that out.

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Mine just lost quercetin as the only ingredient

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then its probably dihydrate

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