What is Quercetin?

Category: Supplements

Most popular types: Jarrow Formulas Quercetin Life Extensions Optimized Quercetin

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See also: Quercetin with Bromelain

Quercetin is a flavonol that constitutes the major bioflavonoid sources in the human diet. The glycoside form is readily available in dietary plants such as teas, onions, apple and buckwheat. It is thought to have antioxidant, anti-inflammatory and anti-allergy properties.

Reported purpose & perceived effectiveness
Purpose Patients Evaluations Perceived Effectiveness
Inflammation 4 0
General health 2 2
Mast cell activation syndrome 2 1
Parkinson's disease 2 2
Amyotrophic lateral sclerosis 1 3

Show all 12 reasons taken


  • Major
  • Moderate
  • Slight
  • None
  • Can't tell

Side effects

Side effects as an overall problem

Side effects as an overall problem
Severity Evaluations Percentage
Severe 0
Moderate 0
Mild 0
None 15

Commonly reported side effects and conditions associated with Quercetin

Side effect Patients Percentage

Why patients stopped taking Quercetin

Multiple reasons could be selected

Reason Patients Percentage
Did not seem to work 5
Other 4
Doctor's advice 2
Expense 2
Change in health plan coverage 1
Course of treatment ended 1
Personal research 1
See all 11 patients who've stopped taking Quercetin

Duration

Stopped taking Quercetin

Duration Patients Percentage
1 - 6 months 6
6 months - 1 year 2
1 - 2 years 2
2 - 5 years 1
5 - 10 years 1
Adherence
Adherence Evaluations Percentage
Always 9
Usually 6
Sometimes 0
Never taken as prescribed 0
Burden
Burden Evaluations Percentage
Very hard to take 0
Somewhat hard to take 0
A little hard to take 2
Not at all hard to take 13
Cost per month
Cost per month Evaluations Percentage
$200+ 0
$100-199 0
$50-99 0
$25-49 5
< $25 5
Not specified 5
Last updated:

3 patient evaluations for Quercetin

Oct 10, 2011 (Started Mar 15, 2011)

  • Effectiveness
    Can't tell (for Parkinson's disease)
  • Side effects
    None
  • Adherence
    Usually
  • Burden
    Not at all hard to take
Dosage: 500 mg Daily

  • 0 helpful marks

Jul 11, 2011 (Started May 05, 2011)

  • Effectiveness
    Slight (for allergies)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 1000 mg Daily
Cost: < $25 monthly

May 7, 2011 (Started May 05, 2011)

  • Effectiveness
    Major (for allergies)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 1000 mg Daily
Cost: < $25 monthly

  • 0 helpful marks

Apr 1, 2011 (Started Apr 28, 2009)

  • Effectiveness
    Slight (for human immunodeficiency virus (HIV))
  • Side effects
    None
  • Adherence
    Usually
  • Burden
    Not at all hard to take
Dosage: 250 mg Daily
Advice & Tips: take w vit c
Cost: < $25 monthly

  • 0 helpful marks
Last updated:
Showing 3 of 3 patient evaluations for Quercetin