Cook 2020

Current Status of Trial
Completed
Study Aim
Cognitive Enhancement (healthy)
Study Design
RCT
Blinding
Double-blind
Intervention type
Pharmacological
Intervention
Blackcurrant
Dosage and Duration
14 older adults (age: 69 +/- 4 years, height: 172 +/- 9 cm, body mass: 85 +/- 12) ingested NZBC extract (600 mg.day(-1) CurraNZ) or placebo (PL, 600 mg microcrystalline cellulose) for 7-days (7-day washout between conditions).
Absolute Number of Participants
14
Health Status/Diagnosis
Healthy elderly
Study log
New Zealand blackcurrant (NZBC) can increase exercise performance in young adults, potentially by anthocyanin-induced cardiovascular function alterations and increased blood flow, however, effects upon blood pressure, functional exercise performance and cognitive function in older adults is unknown. In a randomized, double-blind, placebo-controlled, cross-over design, 14 older adults (age: 69 +/- 4 years, height: 172 +/- 9 cm, body mass: 85 +/- 12) ingested NZBC extract (600 mg.day(-1) CurraNZ) or placebo (PL, 600 mg microcrystalline cellulose) for 7-days (7-day washout between conditions). On day-7, 2-hours following consumption of the capsules, resting blood pressure, cognitive function (Cambridge neuropsychological test automated battery) and 6-minute walk test performance and were measured. Intake of NZBC caused a decrease (p < 0.05) in systolic (PL: 136 +/- 14; NZBC: 130 +/- 12 mmHg) and diastolic (PL: 84 +/- 11; NZBC 78 +/- 6 mmHg) blood pressure. There was no effect on 6-minute walk performance or cognitive function variables. Future research should address optimization of intake and examine cardiovascular responses during exercise.