I tried to do a web search to Wikipedia to find an official definition for the word diet. First, I had to wade through all the possible websites about diets. One of them offered me a free diet. The word diet by definition means "the sum of the food consumed by an organism or group". So by definition we all have a diet. Some are good. Some are not so good. Before you put out your hard earned money to have packaged "diet " food delivered to your door, think about this. While those diets may work long term for some celebrities, there are probably an even larger number of people that have had little or no success. Jade Teta is an integrative physician and founder of the fitness company, "Metabolic Effect". She reported in a recent article that research has proven many times over that diets do not work! The lone term success rate of a standard diet is 5%. Even worse is that 66% of the dieters gain back the weight and more. They gain back more fat. The answer to all of the this is to make informed decisions about the food. Read the labels, use the internet, find a good book and start learning about the food that contributes to your health not just the number on the scale. It might be worth your money to find a nutritionist. As I see it, food can do one of two things. It can work for you or work against you.
Resource: IDEA Fitness Journal March 2014 "How To Help Clients beat Belly Fat" By Jade Teta, ND