Overweight and obesity are major risk factors for many chronic diseases, including diabetes, cardiovascular diseases, and cancer. High body mass index (BMI) led to nearly 4 million deaths in 2015, a 19.5% increase since 2005 worldwide. It is the leading risk factor in terms of healthy years of life lost in Turkey, second leading in six other OECD countries, and third leading in another 24 member countries (Forouzanfar et al., 2016). Obesity has risen quickly in the OECD in recent decades, and projections show that this trend will continue (OECD, 2017). It has affected all population groups, regardless of gender, age, race, income or education level, though to varying degrees (Sassi, 2010).