Happiness and mental health are highest among people who eat 7 portions of fruit and vegetables a day. Mental wellbeing appeared to rise with the number of daily portions of fruit and vegetables people consumed. Wellbeing peaked at seven portions a day. In Britain today, a quarter of the population eat just one portion or no portions of fruit and vegetables per day. Only a tenth of the British population currently consume the magic number of seven or more daily portions.
Social Indicators Research, October 2012