Adequate food is able to promote the proper functioning of the intestine and promote the reduction of harmful factors such as cholesteral, diabetes, fat accumulation, among others. In this case, a diet rich in fiber and vegetable oils can promote good digestion and reduce the accumulation of bad fats in the blood. This is because fiber assists in digestion allowing good intestinal transit, while vegetable fats do not accumulate, preventing cholesterol.
It makes them more motivated more confident after they find out they could be doing somthing wrong. After looking at their health in full view it makes them realise to do better.