Could You Please Tell Me about Quercetin? - Vitamins & Supplements Message Board

salty · 12-30-2008, 04:51 PM

Hi. I have heard good things about this...I bought the citrus kind w/bromelain and rutin.

Could you please tell me what you know about it?

I saw some posts on the allergy boards (that it helps), but since I can only post on one board about it, I thought this one would be best.

Thank you so much for your help,

Salty

katolb90 · 01-22-2009, 11:03 AM

Yeah, it will help. I wouldn't take it if you have any type of thyroid problem or autoimmune though. Also it didn't pass an Ames Test for carcinogins. I'm not sure about the significance of this. (whether it was one test or many I don't remember). You should do some research on it first. Most reports are very favorable and it did help me when I took it.

salty · 01-23-2009, 09:49 PM

katolb90, i am sick with fever, body aches and chills again...the flu...i started taking a small amount of l-tyrosine around the same time i got sick as well as the quercetin.

i have stopped the l-tyrosine...you have me worried about the quercetin...isn't it just made from the skins of fruit? how would it affect my thyroid? and i thought it boosts the immune system?

this is the 2nd flu i've had this winter...i haven't been able to answer any of my other posts because i feel so lousy, but i had to answer this in case the quercetin has something to do with me getting sick.

i haven't been able to be on the computer, i feel so ill.

i'm scared to take it now...i don't understand, i thought it just boosts vit. C?

please write back...i wish others would too...i'm so tired of getting sick...i thought the quercetin would help.

what did it help you with allergies? it hasn't done anything for me...i thought when i first starting taking it that it was keeping me from getting sick because i have been to the dentist several times and have been around a few people who had been sick, but then i got the flu again and it's been bad...worst i can remember and i just had it not too long ago.

i got the quercetin to help my immune system...i didn't think it could be harmful.

if it messes with my thyroid at all, i don't want to take it.

Hope to hear back from you...thank you for posting,
Salty

katolb90 · 01-26-2009, 02:18 PM

What are you taking L-Tyrosine for?

Quercetin is a flavonoid and I read that if you have thyroid problems (particularly hypothyroid or hashimotos thyroiditis) then you should not take flavonoids including but not limited to bioflavonoids that are found in some vitamin C products. Many herbs and supplements are in the flavonoid family including green tea. If you don't have a thyroid problem then it shouldn't effect your thyroid.

I was taking quercetin for sinus congestion and allergy like symptoms.

Anything that effects the immune system like quercetin will help you or it could backfire and cause you to be sick. For instance, whenever I've tried vitamin C and/or Zinc they always make me feel sinusy or like I'm coming down with something. My suspicion is that I have an overactive immune system due to having an autoimmue problem. If you do have a thyroid problem, things that you take into your body may not have the same effect as a healthy person. I am constantly dealing with that problem. I get side effects from stuff that most people don't get side effects from.

Definitely don't take any more quercetin. If you have a lot of recurrent colds/flu you very well could have a thyroid problem.

nscrbug · 01-26-2009, 05:34 PM

Quote:

Originally Posted by katolb90

What are you taking L-Tyrosine for?

Quercetin is a flavonoid and I read that if you have thyroid problems (particularly hypothyroid or hashimotos thyroiditis) then you should not take flavonoids including but not limited to bioflavonoids that are found in some vitamin C products. Many herbs and supplements are in the flavonoid family including green tea. If you don't have a thyroid problem then it shouldn't effect your thyroid.

Wow...I was NOT aware of this. I am hypo (taking 88mcg of Levoxyl). But I've been taking a 1000mg Vit. C supplement (Ester-C) daily...is this affecting my thyroid or my thyroid medication in any way? Should I stop taking the Vit C? Can you be more specific on which other supplements/herbs I should steer clear of? Thank you!

Linda