Clinical trial

The Combined Effect of Dietary Nitrate and Caloric Restriction on Cognitive and Vascular Function.

Recruiting now · Not applicable · 1 countries · Registry ID NCT06151015

Recruiting nowNot applicableInterventional

What this study is about

This pilot study will compare the effect of combining dietary nitrate and caloric restriction versus dietary nitrate alone. The participant will be contacted, having responded to an advertisement on social media and posters, to attend the screening visit. They will be asked about their health status, suitability for MRI and availability. The investigators will use physical activity and eating attitude questionnaires. The investigators will also measure their height, weight, body mass index (BMI), and blood pressure (BP) and undertake blood tests. If they are eligible, they will be randomised to one of the two arms. The first group will consume nitrate-rich beetroot juice with a calorie-restricted diet for 28 days. The second group will drink the same juice with a weight-maintenance diet for the same period. The food and drinks will be provided. The outcome measures will be measured twice (at the baseline and end visits) to evaluate the change. The primary outcome is the cognitive function. The secondary outcomes are peripheral vascular health (BP and microvascular perfusion), cerebral vascular health (brain blood flow), anthropometry, body composition, and exhaled NO and nitrate concentrations. Also, the feasibility and accessibility of the study will be assessed.

A promising-looking record is not the same as confirmed eligibility. The study team must review the full criteria and current recruitment status.

Basic eligibility

Age60 Years to 75 Years

SexAll

Healthy volunteersAccepted

ConditionHealthy, Older Adults, Overweight and Obesity

Full registry criteria

Inclusion Criteria: * Participant is able to give written informed consent for their participation in the study. * Healthy. * Non-smoking adults. * Male or female. * Aged 60 to 75 years. * BMI between 25 and 40 kg/m2. Exclusion Criteria: * Systolic BP \> 180mmHg and/or diastolic BP \>110mmHg at the Clinic Screening Visit. * Contraindication for MRI. * Does not have adequate understanding of verbal and written information in English, sufficient to complete an MRI safety screening and to give informed consent. * Any existing or previous medical condition that may affect the study outcomes (i.e., diabetes, kidney dysfunction, malignant cancer, brain surgery, stroke). * Any medical treatment that may affect the study outcomes (i.e., diuretics, anti-acids, organic nitrates, anti-pyschotics or neuro-stimulants). * Evidence of an eating disorder as indicated by the Three-factor eating questionnaire (Eating Attitudes Tests-26). * Blood donation within the last 3 months of the anticipated intervention beginnings. * Having taken part in a research study in the last 3 months involving invasive procedures or an inconvenience allowance. * High-alcohol consumers (≥ 14 units/week for females, and ≥ 22 units/week for males). * Vegetarianism (likely to have very high nitrate intake and food provided during the dietary intervention unsuitable). * Weight change over 3.0kg in the last 2 months (important influence on vascular function).

Treatments and study arms

Nitrate-rich beetroot juice plus calorie-restricted diet

Other

One daily bottle (70ml) of nitrate-rich beetroot juice with a calorie-restricted diet (1,000kcal deficit).

Nitrate-rich beetroot juice plus weight-maintenance diet

Other

One daily bottle (70ml) of nitrate-rich beetroot juice with a weight-maintenance diet (energy will be met).

Primary outcomes

Cognitive function (TMT-B)Baseline Visit (Day 0)-one day before intervention, and End Visit (Day 29)-one day after intervention.

Change in cognitive function from the baseline after 28 days intervention using a pen-and-paper cognitive test (TMT-B) compared to the comparator.

Study locations

1 locations were listed when this page was built. The first 40 are shown.

The University of Nottingham🇬🇧 Nottingham, Nottinghamshire, United Kingdom

Open map

Mushari Alharbi, MBBS, MScContact

Email · Call +44 (0)115 823 0141

Moira A Taylor, PhD RDContact

Email · Call +44 (0)115 823 0141