Full Breakdown
Daily Fruit Juice May Boost Mental Well-Being While Supporting UK 5-a-Day Goal
8/10/2026, 5:51:00 AM
Core Findings of the UK Trial
A four-week randomized controlled trial conducted by researchers at Newcastle University examined adults who ate two or fewer portions of fruit and vegetables per day. Participants were assigned to a control group that kept their usual diet, (2) a whole-food group that increased intake to five portions using only fruits and vegetables, or a juice-plus-whole-food group that added one glass of 100 % fruit juice or a smoothie daily while also reaching five portions. After the intervention, the juice-plus-whole-food group recorded significantly lower depression scores than the control group, while anxiety scores showed no clear difference.
Context of Fruit-and-Vegetable Intake in Britain
National guidance recommends five portions of fruit and vegetables daily, yet fewer than one-in-five UK adults and one-in-ten teenagers meet the target. Cost of fresh produce is frequently cited as a barrier, especially amid ongoing cost-of-living pressures.
Data & Statistics
- Sample size: 42 participants (14 per group).
- Depression (PHQ-9) scores: mean 5.45 in the control group versus 2.93 in the juice group, a reduction of 2.52 points on the 27-point scale.
- Fiber intake rose by an estimated 8–10 g per day in both intervention groups.
- No adverse changes in metabolic health markers were observed among juice consumers.
- All participants received £10 per week; groups 2 and 3 also received educational materials.
Official Statements & Responses
Lead researcher Dr Courtney Neal, now at the University of Liverpool, emphasized that targeted financial and educational support enabled participants to overcome common barriers to the 5-a-day goal. Senior author Dr Oliver Shannon highlighted the potential of a daily glass of juice or a smoothie to offset price constraints on fresh produce and noted the modest yet statistically significant improvement in depression scores as a promising avenue for further research.
Verbatim Quotes
- “While most people know eating 5-a-day can be good for your health, many people struggle to.” — Newcastle University, of Liverpool
- “Given the ongoing cost of living pressures in the UK, the price of fresh produce is often a barrier for people trying to eat more fruit and vegetables. Our study shows that drinking a daily glass of fruit juice or a smoothie could be part of the solution and help people reach 5-a-day fruit and vegetable targets.” — Ageing, at Newcastle University and one of the senior authors of the study
