PhD Studentship: Cocoa Flavanols and Mental Health: An Investigation of Mood, Cognition and Gut–Brain Mechanisms

Department/School: Psychology and Clinical Language Sciences

Supervisors:  Dr Katie Barfoot, Dr Daniel Lamport, Dr Gemma Walton

Project Overview:   Are you interested in how diet influences mental health and brain function? This PhD explores how bioactive compounds in cocoa may support mood, cognition and psychological wellbeing.

Mental health disorders and cognitive decline are growing global challenges, with increasing interest in dietary strategies as accessible, low-risk interventions. Flavonoids—naturally occurring compounds in plant-based foods—have been linked to improved cognitive performance and wellbeing. Cocoa is a rich source of flavanols, which may affect brain function via cerebral blood flow and the gut microbiome.

This project addresses key evidence gaps using a novel high-flavanol cocoa product developed by an industry partner. Unlike previous research, it enables investigation of dose–response effects within realistic dietary intake.

This interdisciplinary PhD spans psychology, nutrition and biological sciences, combining evidence synthesis with experimental and clinical research. You will conduct a systematic review, develop and pilot study protocols, and undertake both pre-clinical and clinical research. Laboratory work will explore how cocoa flavanols are metabolised by the gut microbiome, while at least two human trials will examine effects on mood, cognition, stress and gut health.

You will gain training in clinical trials, biological and psychological assessment, data analysis and scientific communication, while collaborating with industry. This project is ideal for candidates interested in mental health, diet and interdisciplinary research.

Eligibility: 

• Applicants should have a good bachelor’s degree (minimum 2:1 or equivalent) and a master’s degree (minimum UK merit or equivalent) in either psychology, nutrition, neuroscience, biological science or a related discipline.
• Due to the nature of the funding this studentship is open to UK/Republic of Ireland applicants.

Funding Details:   

• Starts October 2026
• 3 years
• UK tuition fees covered for the full 3 years
• Stipend maintenance allowance of £21,805 per year

How to apply:  

To apply click the 'Apply' button above and create your account, and use the link sent by email to start the application process. During the application process please select the PhD in Psychology. You will be required to submit a personal statement (1 A4 page).

*Important notes*

• 1) Please quote the reference ‘DRC26-016’ in the ‘Scholarships applied for’ box which appears within the Funding Section of your on-line application.
• 2) If the application system prompts you to submit a research proposal, please paste in the project title and move on to the next step in the application.

Application Deadline:  Sunday 21^st June

Further Enquiries:  

Please note that, where a candidate is successful in being awarded funding, this will be confirmed via a formal studentship award letter; this will be provided separately from any Offer of Admission and will be subject to standard checks for eligibility and other criteria. 

For further details please contact katie.barfoot@reading.ac.uk.

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