that isn't scientifically rigorous they have too few participants or there's no control group lilian christestudies all the major diseases of modern civilization such as cancer dementia and heart attacks. looking at what might protectors and what might increase the risks the epidemiologist is hoping to counter scientific myths such as detoxing with facts davison shaft mr. science wants to bring the truth to light and he wants to dispel myths rushed into it once to explain links and determine whether treatments help or not. the aim is to find out more about the human body for example. million crist works for the nationwide narco health study narco is the german national cohort and has been running since two thousand and fourteen the scientists want to examine two hundred thousand people at regular intervals over a period of twenty to thirty years. the scientists have set the bar high for their study all the tests are strictly standardized from the questionnaire to the smell identification test. despite great progress in many areas science often cannot find simple solutions to complicated prob