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4 peer-reviewed studies
What the evidence says
Most Blackcurrant studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.
Most evidence is from medium-quality randomised trials published 2000–2020 with a typical study size of 20 participants.
Based on 4 studies · 4 RCTs · 72 total participants
Confidence
ModerateBy outcome
Newest study from 2020
Seven-day intake of New Zealand blackcurrant extract improves 16.1 km cycling time-trial performance and increases fat oxidation during moderate-intensity cycling.
Cook MD, Myers SD, Blacker SD, Willems ME · Eur J Appl Physiol (2015)
Oral administration of black currant anthocyanins may be a safe and promising supplement for patients with open-angle glaucoma in addition to antiglaucoma medication.
Ohguro H, Ohguro I, Katai M, Tanaka S · Ophthalmologica (2012)
Supplementation with NZBC extract had no effect on the recovery of countermovement jump variables and perceptions of muscle soreness or fatigue following a half-marathon.
Costello R, Willems MET, Myers SD, Myers F, Lewis NA, Lee BJ, Blacker SD · Int J Sport Nutr Exerc Metab (2020)
Black currant anthocyanoside intake brought about dose-dependent lowering of the dark adaptation threshold and significant improvement in subjective visual fatigue.
Nakaishi H, Matsumoto H, Tominaga S, Hirayama M · Altern Med Rev (2000)