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the claim
Olive trees produce bitter-tasting fruit due to oleuropein concentration
the verdict
SUPPORTED
the evidence backs this
refutedsupported
the weight of evidence
3 sources for · 0 against

Olive fruit is naturally bitter and astringent due to the presence of the phenolic compound oleuropein.

Evidence for · 3
Polyphenol oxidase and oleuropein in olives and their changes during olive ripening
2021 · cited by 3
Identifies oleuropein as the main phenol in olives contributing to their organoleptic properties.
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The analysis

Judged against the evidence record for claims of this kind.

More for · 2
Wikipedia: Oleuropein
cited by 0
Reference article covering this claim directly
Wikipedia: Olive
cited by 0
Reference article covering this claim directly
Everything we examined (4)
  1. Wikipedia: Oleuropeinreferencesupports
  2. Wikipedia: Olivereferencesupports
  3. Book: Functional Foods and Nutraceuticals in Metabolic and Non-communicable Diseasesreferenceno side takennot shown: read and judged not to bear on this claim
  4. Polyphenol oxidase and oleuropein in olives and their changes during olive ripeningpeer-reviewedsupports
The paper trail · every fact has a biography
first checked05 Aug 2026
judged → SUPPORTED · 7905 Aug 2026
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