Abstract
The research question of this systemic review was: What is the evidence that the ketogenic diet is effective for obesity compared with other low-calorie diets? The aim of this systematic review was to investigate ketogenic diet efficacy for treatment of obesity. The research approach was to use key terms to obtain scientific papers that are associated with science by using the PubMed search engine. A total of 439783 papers related to the subject of obesity were found starting with “Obesity”. To limit the search, filters were used with 141767 articles to pick papers within the recent 5 years. In order to further narrow down the articles, filters have been used to pick human articles and exclude other species. For obesity in humans, 86803 papers were discovered. Adding "diets" further limits the papers into 48068. By adding the term "low calories", the articles have been further restricted to 172 items. By using the word "Ketogenic diet," the number of articles was further reduced into seven papers. It has been found that the ketogenic diet (KD) is an important factor in obesity treatment especially in morbid obese persons with or without diabetes. KD enhance both the loss of weight and quality of life for obese patients who run laparoscopic adjustable gastric banding (LAGB) and struggling to lose more weight, as well as patients who applied intra-gastric balloon positioning. In an obese patient with mild to serious psoriasis, KD increased the response to systemic therapy and therefore improved the quality of life.

Key words: ketogenic diet; obesity; low calorie diets