Fast food contributes to many health problems in children and adults due to its negative effects. Clever marketing campaigns try to influence what and how much fast food people buy, ignoring proper adult portion sizes. The root cause of many child diseases is obesity from fast food, while excess sugar leads to diabetes and heart issues. Too much sodium can cause fluid retention and diseases like congestive heart failure. A single fast food meal may contain a day's worth of calories, contributing to weight gain, as numerous documentaries and books have explained. Working together to learn more about our food could help create a healthier nation.