Following article provides good info on relationship between Stress and Obesity.
It also provides great depth of information on Cortisol, its production and its role in human physiology.
Many studies have confirmed relationship between stress and obesity. Many more research are undertaken for its causes and treatment.
Hormones have very important role in human body. It controls our various functions, mental as well as physical. For Stress related issues, it is very important to understand Cortisol and how is functions.
Moreover, attached link will also help readers/novice Reiki practitioners to understand Role of Reiki in managing stress and thereby Obesity.
http://www.unm.edu/~lkravitz/Article%20folder/stresscortisol.html