|Review articles are the summary of current state of understanding on a particular research topic. They analyze or discuss research previously published by scientist and academicians rather than reporting novel research results.
Review article comes in the form of systematic reviews and literature reviews and are a form of secondary literature. Systematic reviews determine an objective list of criteria, and find all previously published original research papers that meet the criteria. They then compare the results presented in these papers. Literature reviews, by contrast, provide a summary of what the authors believe are the best and most relevant prior publications.
The concept of "review article" is separate from the concept of peer-reviewed literature. It is possible for a review to be peer-reviewed, and it is possible for a review to be non-peer-reviewed.
Obesity is currently the most widely expanding epidemic disease of the modern world . It is defined as the excessive storage of body fat and it is diagnosed mainly according to the World Health Organization (WHO) Body Mass Index (BMI) criteria. A woman is diagnosed as obese when BMI is 30 Kg/m2 and overweight when BMI is between 25-29.9 Kg/m2. Obesity is a multifaceted, chronic inflammatory disease, characterized by metabolic and endocrine disorders, as well as behavioural declinations. The two prime factors for the manifestation of obesity are the genetic predisposition accounting for 60% and the environmental conditions accounting for another 40%.