To help with the research the University is looking for 200 people, from the Bristol area, to take part in the study.  Prior to taking part, volunteers will be asked to complete two short questionnaires to make sure they are suitable for the study, focusing on diet, health and wellbeing. All volunteers will receive a copy of the final study results.

Dr Katherine Appleton, a researcher in Experimental Psychology, said: 'A healthy diet is important for both physical and psychological health and wellbeing.  Healthy diets, however, can be difficult to achieve, resulting in many of us turning to dietary supplements as a way of maintaining a healthy lifestyle.'

Volunteers will have their expenses paid, and will be free to withdraw at any time. All data collected will be kept confidential and anonymous.

If you wish to take part or have further questions about the study, please contact Dr Katherine Appleton on 0117 954 6618 or email k.appleton@bristol.ac.uk

The 200 individuals will be asked to take either dietary supplements or placebo tablets for a period of 12 weeks.  At the start, in the middle and at the end of the 12 weeks, physical and psychological health will be measured using a number of questionnaires, computer tests and a blood test.

The study is organised and run by the University of Bristol, in collaboration with the MRC Human Nutrition Research in Cambridge.

The research is being carried out in the University of Bristol's Department of Experimental Psychology by researchers, Dr Katherine Appleton and Dr Rob Hayward, under the supervision of Professor Peter Rogers.  Also involved in the research are Dr Andy Ness, Deputy Director of ALSPAC, Professor David Gunnell, Department of Social Medicine and Dr David Kessler and Professor Tim Peters from the Division of Primary Health Care.

The study is funded by the Food Standards Agency, a non-ministerial department of the UK government.