The first three letters of the above word scare me out of my wits! However to day we are not meant to offer dictionary definition for diet. My right guess just as yours is that a majority if not all of us have a rough clue on that. We will thus take a slight analysis of how the first three letters are related to the entire word and further on how we can dissociate them.
Food alongside shelter and clothing is basic human need. It gives us energy that is the fuel of success. Food combination however is a key area studied by world scientists with specialty in food science. Ivav Pablov was the first scientist to launch into this field. We mostly remember him for his stimulus study in which he used a dog. The dog learnt to associate ringing of the bell and feed time.
Whether at our homes or at the most favorite luxurious resorts, everyone likes the best food. For instance a majority of us will combine meat with potatoes, rice with fish, chicken with potato chips and the list grows deliciously long. As tantalizing as the above combinations appear, research shows its completely wrong! Why?
It takes us back to digestion. Starchy foods (rice,potato,chips) require an alkaline medium to digest which is initially provided in the mouth by enzyme pytalin. Protein rich foods (meat, fish, chicken) require an acidic medium to digest this is provided by hydrochloric acid and pepsin. Its a law of Chemistry that two contrary mediums can not work in harmony at the same time. They neutralize each other due to incompatibility. When you ingest a starch(rice) and protein(fish) digestion is impaired or completely arrested. undigested food becomes soil for bacteria which ferment it and decompose it giving rise to digestive disorders and gas!
Offered suggestions indicate that we can arrest this by; Taking plenty of water rich foods preferably fresh fruits. They contain fructose which is easily converted into glucose, Include a salad with each meal and for the case of the combinations, we are to choose one of the meals. a starch or a protein at a time. However if we still feel that its necessary we take both of them, we can choose to take a starch at lunch and a protein for dinner; better put at different timings. Eating too much starch regularly leads to obesity on the contrary side under nutrition results to disorders such as kwashiokor which my friend jokingly refers to PDR _poverty related diseases!
*offered here is not a recommendation but views of my basic food research.