Many diseases in humans are thought to be directly or indirectly related to nutrition, These include, but are not limited to, deficiency diseases, caused by a lack of essential nutrients.
Additionally, several diseases are directly or indirectly impacted by dietary habits, and require very close attention to the nutrient content of food.
Overnutrition (eating too much)
Vitamin poisoning Vitamins
Iron overload disorder Microminerals and Macrominerals
Deficiencies (eating too little)