This project aims to investigate whether consumption of cocoa polyphenols has an impact on cognitive function in individuals aged 50 to 60 years of age and if such an improvement is a result of an improvement in risk factors associated with cognitive decline in ageing.
Healthy cognitive ageing is an important aspect of the ageing process as it involves larger numbers of people compared to those who have already been diagnosed with conditions on the dementia spectrum (Deary et al, 2009). Hence, an active effort looking at potential lifestyle factor modification interventions to help maintain cognitive well-being are warranted. With an ageing population, the prevalence of cognitive syndromes such as Alzheimer's disease and Parkinson's disease increases (Vauzour, 2012). Nutritional interventions can play a role in successful ageing by helping to delay the onset of age-related conditions (Hendrickx, McEwen \& van der Ouderaa, 2005; Brown, Riby \& Reay, 2009; Monti, Moulton \& Cohen, 2015). Studies have investigated the potential role of polyphenols as part of a neuroprotective lifestyle. Mouse model studies have looked at varying polyphenol sources such as tea (Haque et al., 2006; Kaur et al., 2008), blueberry (Shukitt-Hale et al., 2015; Williams et al., 2008), Gingko Biloba (Shif et al., 2008) and cocoa (Bisson et al., 2008) to mention a few. Ageing and neurodegenerative diseases are caused by neuronal death which in turn can be triggered by neurotoxins, neuroinflammation and specific genetic mutations (Bishop, Lu \& Yankner, 2010). Dietary polyphenols have been observed to provide neuroprotection against cellular alteration by modulating the neuronal function against endogenous neurotoxins and inhibition of glial induced neuroinflammation (Vauzour, 2012).
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
DOUBLE
Enrollment
16
High polyphenol content chocolate bar. Each participant will consume 581.4mg of polyphenols
High polyphenol content cocoa powder. Each participant will consume 6g containing 554mg of polyphenols
Low polyphenol content matched chocolate bar. Each participant will consume 198.5mg of polyphenols
Queen Margaret University
Edinburgh, United Kingdom
Cognitive Function
A test battery consisting of 7 tests will be used to investigate the role of cocoa flavanols on cognitive function in the cohort.
Time frame: 8 weeks
Blood Pressure
Time frame: 8 weeks
Pulse Wave Analysis
Carotid to femoral Pulse Wave Velocity (PWV) and Augmentation Index (Aix) will be measured using a Vicorder.
Time frame: 8 weeks
Glycated Haemoglobin (HbA1c)
Time frame: 8 weeks
Weight (Kg)
To allow for BMI measurement
Time frame: 8 weeks
Height (m)
To allow for BMI measurement
Time frame: 8 weeks
Body Fat Percentage
Time frame: 8 weeks
Energy intakes (Kj)
Time frame: 8 weeks
Flavonoid intakes (mg)
Time frame: 8 Weeks
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Low polyphenol content cocoa powder. Each participant will consume 6g containing 191.2mg of polyphenols