B-FIT AGE _V1.0
Research type
Research Study
Full title
The Combined Effects of Exercise and New Zealand Blackcurrant Supplementation on Muscle, Vascular, Mitochondrial, and Gut Health in Older Adults: A Randomised Controlled Trial.
IRAS ID
361269
Contact name
Julie Elizabeth Anna Hunt
Contact email
Sponsor organisation
University of Surrey
Duration of Study in the UK
2 years, 0 months, 0 days
Research summary
As people age, they naturally lose muscle mass and strength, a condition known as sarcopenia. This can lead to frailty, reduced independence, and a lower quality of life. Exercise is known to help, but not everyone can commit to regular training. Blackcurrants contain natural compounds called anthocyanins, which have antioxidant and anti-inflammatory properties and may support muscle and vascular health. However, little is known about their long-term benefits in older adults.
This study will investigate whether 12 weeks of New Zealand Blackcurrant (NZBC) extract supplementation can improve muscle mass, physical function, and overall health in older adults. We will also explore whether the effects are greater when combined with a structured exercise programme. Additional measures will include vascular health (blood vessel function), mitochondrial function (how well muscles produce energy), gut microbiome composition, inflammation markers in blood, and health-related quality of life.
The study is a randomised controlled trial with four groups: (1) exercise plus NZBC, (2) exercise plus placebo, (3) NZBC only, and (4) placebo only. Participants will be aged 65 years or older and generally healthy. The study will run for 12 weeks, with assessments before and after the programme. Those in the exercise groups will complete three 30–60-minute sessions per week, either supervised at the University of Surrey or remotely at home. Participants in supplementation groups will take NZBC or a placebo capsule daily.
The findings could help identify new strategies to maintain muscle health and independence in older adults, reducing the risk of frailty and associated health problems. This research is funded through a BBSRC FoodBioSystems DTP studentship and will be conducted at the University of Surrey.
REC name
London - Riverside Research Ethics Committee
REC reference
25/LO/0809
Date of REC Opinion
7 Jan 2026
REC opinion
Further Information Favourable Opinion