hundred people are taking. the scientists want to know which diet helps to keep the test subjects physically and mentally fit for longer. the doctors do regular blood tests for things like blood sugar lippitt and inflammatory marcuse which provide information on chronic illnesses the tests also show whether the individual has been sticking to the diet. throughout the entire study the doctor who's a monitoring participant health. this study will not be complete for another three years but well conducted extensive studies carried out by hospitals still have one drawback most of the participants have some kind of prior health issues such as high blood pressure increased levels or excess weight they may therefore respond more quickly or more noticeably to a change in diet than