There are literally hundreds of thousands of diets. Some are for losing weight, others for gaining weight, lowering cholesterol, living a long and healthy life, etc. The Mediterranean Diet, for example, reflects the culinary habits of southern European people.
The word diet comes from Old French diete and Medieval Latindieta meaning “a daily food allowance”. The Latin word diaeta and Greek word diaita mean “a way of life, a regimen”.
A diet can be described as a set course of eating and drinking in which the kind and amount of food one should eat is been planned out in order to achieve weight loss or follow a certain lifestyle.
This Medical News Today information article provides details on the most popular diets according to three criteria: how many articles there are around about these diets/lifestyles, how popular they seem to be generally, and how often we receive feedback on them.