Timing Protocol
What researchers say about when, how and with what to take quercetin, and how strong the evidence is.
The verdict on Quercetin overall
Leaning for
Quercetin is worth taking.
10 sources: 6 positive, 4 partly
Short answer
With meals
No timing claim on Quercetin has been checked yet. The timing notes above are not yet backed by counted mentions.
Built from every credited researcher and cited study on each claim.
Quercetin is worth taking.
Researchers
Paolo Torlione, on The Dr. Hyman Show, at 56:17
Positive Video · Opinion
Open the tape at 56:17 →“D I believe very much in quarter team in uh in latoverin which is a two or two molecules that are very effective in”
Dr. Paolo Tordiglione, on The Dr. Hyman Show, at 00:32
Positive Video · Opinion
Open the tape at 00:32 →“i believe very much in quercetin in in lactoferrin which is uh two two molecules that are very effective in”
Mark Hyman, on The Dr. Hyman Show, at 01:16
Positive Video · Opinion
Open the tape at 01:16 →“compounds that are found in food like quercetin which is in onions”
Michael Murray, on The Dr. Hyman Show, at 27:34
Positive Video · Opinion
Open the tape at 27:34 →“help heal that that bucket by taking quercetin it it activates that longevity Gene”
Studies
Pooled analysis, Nutrients, 2017, PMID 28208791
Positive Study
Read the paper on PubMed →The results of this meta-analysis suggest that intake of flavonols, particularly quercetin, has a beneficial effect on blood lipids, glucose and blood pressure, contributing to lower global risk of cardiovascular disease.
Other primary study, Front Pharmacol, 2023, PMID 36712674
Positive Study
Read the paper on PubMed →In conclusions, the results revealed in this study suggest possible therapeutic role of quercetin supplementation in the early-stage mild to moderately symptomatic COVID-19 outpatients and may help in the speedy clearance of the SARS-CoV-2 infection, early resolution of the acute symptoms and modulation/control of the host’s hyperinflammatory response.
Controlled trial, Pharmacol Res, 2010, PMID 20478383
Partly Study
Read the paper on PubMed →In summary, quercetin supplementation in doses of 500 and 1000 mg/day for 12 weeks significantly increased plasma quercetin levels with no reported side effects, but was not found to decrease total number of URTI sick days or reduce symptomatology for all subjects.
Controlled trial, Br J Nutr, 2015, PMID 26328470
Partly Study
Read the paper on PubMed →Regular ingestion of a supra-nutritional dose of 162 mg/d quercetin from onion skin extract did not affect BP and endothelial function in the whole study population of pre-hypertensive and stage 1 hypertensive overweight-to-obese subjects.
Pooled analysis, J Am Heart Assoc, 2016, PMID 27405810
Partly Study
Read the paper on PubMed →When the studies were categorized according to the quercetin dose, there was a significant systolic BP and diastolic BP‐reducing effect in randomized controlled trials with doses ≥500 mg/day (WMD: −4.45 mm Hg, 95% CI: −7.70, −1.21, P=0.007 and −2.98 mm Hg, 95% CI: −3.64, −2.31, P<0.001, respectively), and lack of a significant effect for doses <500 mg/day (WMD: −1.59 mm Hg, 95% CI: −4.44, 1.25, P=0.273 and −0.24 mm Hg, 95% CI: −2.00, 1.52, P=0.788, respectively), but indirect comparison tests failed to significant differences between doses.
Controlled trial, Eur J Pharmacol, 2022, PMID 34863994
Partly Study
Read the paper on PubMed →Due to the complicated pathophysiology of SARS-Cov-2, more research is needed to provide a definite conclusion.
Precis is not affiliated with or endorsed by YouTube or by any researcher, show or publisher we quote. We take no sponsorship, ad or affiliate money, and every verdict is our own review of what was said. How we stay independent
Zinc
Take it with meals to reduce nausea and help absorption. ...
Vitamin C
Any time of day, with or without food. It is taken in a m...
NAC
Take it with food to avoid stomach upset. It is taken in ...
Vitamin D
Take it with a meal that has fat for better absorption. M...
You know when to take Quercetin. A free account opens the interaction warnings for your whole stack. Pro adds chat about your own situation, drawn from 3,700+ hours of recorded interviews with 380 researchers and doctors, plus 48,500+ research studies.
Cancel anytime