Investigating whether drinking purple and red fruit juices can improve memory, reduce inflammation, and support metabolic health in people with obesity

Brief name: Red fruit juice and Purple extract Intervention Arm 1 – Dragon Fruit Juice Group: Participants will consume 250 mL of red dragon fruit juice daily for 6 weeks. The juice contains approximately 55 mg of betalains per serving and will be provided in individual bottles. Participants are instructed to store the juice in their home refrigerator and consume one bottle per day. Dose: 250 mL/day Bioactives: ~55 mg betalains Duration: 6 weeks Mode of administration: Oral, self-administered at home Materials used: Bottled red dragon fruit juice Delivered by: Research team from the University of Wollongong Monitoring: Daily juice tracker; bottle return of unused juice at follow-up and paper diary. Arm 2 – Queen Garnet Plum Extract Group: Participants will consume 30 mL/day of Queen Garnet plum extract, providing approximately 300 mg of anthocyanins per day. The extract will be provided in individual daily doses and stored in the refrigerator. Dose: 30 mL/day Bioactives: ~300 mg anthocyanins Duration: 6 weeks Mode of administration: Oral, self-administered at home Materials used: Bottled extract Delivered by: Research team from the University of Wollongong Monitoring: Daily juice tracker; bottle return of unused juice at follow-up and paper diary. Adherence and Fidelity Monitoring: Participants will complete a daily intake tracker Used bottles and extract packaging will be collected at follow-up Verbal and written instructions provided at baseline clinic visit