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Open WellbeingWhat the studies actually measured

Joints, muscles and pain

Quercetinand Muscle soreness

Only one source here so far, and it measured lower muscle soreness.

How sure anyone can be

Moderate certainty, level 3 of 4

Further research may change this.

The numbers reported

-1.33 standardised effect size
standardised mean difference vs placebo, 0-24 h post-exercise

None of these sources gave a likely range — the band the real answer probably sits in — so how precise these numbers are is still an open question here.

One source, newest first

What we read is the published abstract, not the full paper, so a blank below may still be printed in the paper itself. A fixed rule worked this out from the source’s own fields. Nobody checked this rating by hand.

  • Systematic review, 2023

    Moderate certainty, level 3 of 4

    Quercetin supplementation promotes recovery after exercise-induced muscle damage: a systematic review and meta-analysis of randomized controlled trials.

    Biol Sport. 2023;40(3):813-825. doi:10.5114/biolsport.2023.121320. PMID:37398956.

    Number reported
    -1.33 standardised effect size
    Which way it went
    Lower
    Likely range
    Not in the abstract
    Source’s own words
    standardised mean difference vs placebo, 0-24 h post-exercise
    Who was studied
    Adult
    Compared with
    placebo
    Amount taken
    1,000 mg/d
    For how long
    7 to 84 days
    Disagreement between studies
    Not in the abstract
    Kind of record
    Journal article
    How this rating was reachedstarts at High, one step down: imprecision
    1. Starts at High
    2. Imprecision brought it down to Moderatethe abstract reports no confidence interval for the estimateNot in the abstract
    3. Ends at ModerateOne step down.
    Checked, nothing to step it down for
    risk of bias and indirectness
    Inconsistency
    No disagreement reported, and no count of studies behind it

    Imprecision stops at the first check that applies; others may apply too.

    AI review could not confirm it — an AI agent re-read this finding against the saved source and at least one check failed. The batch record names the check and quotes the sentence that caused the doubt. No person read it.

    Read the abstract on PubMed

What is still missing from these readings

  • One gives no likely range, so how precise that number is is unknown.
  • One do not say how many people took part.

Something nobody wrote down is never a zero and never a guess.

Still to read for Quercetin

Ten of the 19 things on our list for Quercetin have no reading here yet:

  • Common cold incidence
  • Endurance Performance (Time to Exhaustion)
  • Fasting insulin
  • Fasting plasma glucose
  • HDL cholesterol
  • Hemoglobin A1c
  • HOMA-IR
  • Interleukin-6
  • Oxidative stress (F2-isoprostanes)
  • Uric acid

Still to read means nobody here has got to it, not that it was tried and did nothing or that no research exists. A pairing on no list is not a gap: we never set out to read it.

Read next

This is a library, not advice. No recommendation, no dose, no diagnosis, no ranking. We never ask about your symptoms, and nothing here is tailored to you.