Tier 2 — strong

Consumption of black currants, lingonberries and bilberries increases serum quercetin concentrations

I Erlund, J Marniemi, P Hakala, G Alfthan, E Meririnne, A Aro
European journal of clinical nutrition 2003 57(1):37

Bibliography

PubMed
PMID 12548295
DOI
10.1038/sj.ejcn.1601513
Funding
Funding was not specified in the indexed record or the disclosure metadata available for this entry.
Competing interests
A competing-interest declaration was not available in the indexed record or the disclosure metadata used for this entry.

Study snapshot

DesignRandomized parallel dietary intervention
ModelHuman intervention research
Sample40 healthy older men
InterventionMixed berries 100 g/day versus habitual diet
Duration8 weeks
EndpointsExposure and pharmacokinetics

What the study showed, in plain terms

Published in 2003, this source examined forms, absorption and food sources. Design: Randomized parallel dietary intervention. Sample/model: 40 healthy older men. The exposure or intervention was Mixed berries 100 g/day versus habitual diet. Follow-up or treatment period: 8 weeks.

Berry intake increased serum quercetin concentrations.

Whole foods contain many constituents. The study establishes dietary exposure, not a health effect attributable to isolated quercetin.

Continue with Quercetin Data Center

For topic-level interpretation, read Quercetin Forms: Dihydrate, Phytosome, Liposomal and Glycosides. This is a related guide; the citation panel separately identifies articles that directly cite this paper.

Key findings

  • Berry intake increased serum quercetin concentrations.
  • The recorded outcome domains were Exposure and pharmacokinetics.
  • The result applies to the tested exposure: Mixed berries 100 g/day versus habitual diet; 8 weeks.

What this study can and cannot tell us

  • Whole foods contain many constituents. The study establishes dietary exposure, not a health effect attributable to isolated quercetin.
  • An individual controlled trial must be interpreted alongside its comparator, sample size, endpoint selection and independent replication. It does not validate a different commercial formulation or a general longevity claim.
  • Source basis: Source check: PubMed abstract and indexed metadata; full methods were not independently confirmed for this entry. Missing method details, funding information or participant denominators are not inferred.

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Editorial review

Reviewed by the Biohack Blueprint research team

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Dr. Khaled Mahmoud, MBBChCritical Care Medicine, Longevity Science & Editorial Direction Dr. Amr Yasser, PhDCardiometabolic, Musculoskeletal, Gut & Bioavailability Dr. Abdulla Mostafa, PhDCellular Senescence, Neurological, Mitochondrial & Brain-Ageing Biology