Evidence map›Paper›PMID 32460873›Full record

SynthesisJournal of the International Society of Sports Nutrition2020

The effect of New Zealand blackcurrant on sport performance and related biomarkers: a systematic review and meta-analysis.

A J Braakhuis, V X Somerville, R D Hurst

Erratum issued Registry-linked trialAbstract readMeta-AnalysisSystematic Review
PubMed Full text at PMC Publisher
In one paragraph

Synthesis in Journal of the International Society of Sports Nutrition, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. It is linked to trial NCT07114341 (Effect of Lyophilized Cornelian Cherry on Anaerobic Performance in Young Football Players), which is not on this map. Cited by 25 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 5 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT07114341 nacompletednot on this mapstarted 2025, after this paper: background citation

Effect of Lyophilized Cornelian Cherry on Anaerobic Performance in Young Football Players

TypeinterventionalSponsorIstanbul Bilgi UniversityRan2025 to 2025Enrolled50ConditionsSport Nutrition, Sports Performance in Children, Ergogenic Athletic Performance, Ergogenic SupportArmsCranberry Intervention
3 · Its place in the literature

Who cites it

25 citing papers in PubMed, 5 syntheses or guidelines pooled it.

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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

3 authors.

A J BraakhuisDiscipline of Nutrition, Faculty of Medical & Health Sciences, The University of Auckland, Private Bag, Auckland, 92019, New Zealand. a.braakhuis@auckland.ac.nz.ORCID http://orcid.org/0000-0002-6055-0595
V X SomervilleDiscipline of Nutrition, Faculty of Medical & Health Sciences, The University of Auckland, Private Bag, Auckland, 92019, New Zealand.
R D HurstThe New Zealand Institute for Plant and Food Research Limited, Food Innovation Portfolio, Food & Wellness Group, Private Bag, Palmerston North, 11600, New Zealand.

Funding

New Zealand Institute for Plant and Food Research Limited 3563896
6 · The paper itself

Abstract

backgroundBlackcurrants have come to be regarded as a superfood because of their high polyphenol content, namely anthocyanins. While many berry types have been studied, blackcurrant-anthocyanins may be the superior berry when it comes to athletic performance. The purpose of the review was to evaluate the effects of blackcurrant supplementation on athletic performance, oxidative markers, cognition, and side effects.

methodsSystematic review and meta-analysis. Review manager software (version 5.3) was used for the meta-analysis. The risks of bias was independently assessed using the guidelines and criteria outlined in the Cochrane Handbook for Systematic Reviews of Interventions. The data sources for the search included MEDLINE (Ovid), Google Scholar databases, additional references lists, conference proceedings and grey literature until August 2019. Eligibility Criteria included all blackcurrant (New Zealand derived) interventions, randomised control trials, human participants, placebo-controlled only.

resultsA total of 16 separate studies met the criteria for inclusion in the systematic review, with 9 studies contributing to this sport performance meta-analysis. There was an improvement in sport performance when supplementing with blackcurrant, 0.45 (95% CI 0.09-0.81, p = 0.01). The effective dose appears to be between 105 and 210 mg of total blackcurrant anthocyanins, prior to exercise. There were insufficient studies reporting oxidative markers, cognitive effects or biomarkers, and/or side effects to comment on the mechanism of action.

conclusionBlackcurrant has a small, but significant, effect on sport performance, with no known detrimental side effects.

Indexed as

Athletic PerformanceRibesAnthocyaninsBiomarkersHumansNew ZealandRandomized Controlled Trials as TopicSports Nutritional Physiological PhenomenaAnthocyaninsBiomarkersAnthocyaninAthleteBerryExercise

Identifiers

PMID32460873
PMCPMC7251677

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Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.