References

[1] Public Health England (2016) National Diet and Nutrition Survey. Results from Years 5 and 6 (combined) of the Rolling Programme (2012/2013 – 2013/2014) https://www.gov.uk/government/statistics/ndns-results-from-years-5-and-6-combined. Last accessed 23rd September 2016 

[2]  Does not include Princes Fruit Cocktail Pollitt et al. (1982). Fasting and Cognitive Performance. Journal of Psychiatric Research. 17, 169-174.