This study was aimed to determine the frequency of fast foods consumption among consumer at Benghazi city, explore their health and nutritional knowledge concerning fast foods consumption and calculate their body mass index (BMI). Thus a study has been conducted amongst 400 participants attending fast foods restaurants, parks, and malls in Benghazi city. The main results indicated that, fast food consumers are mainly young, especially those under forty years of age, men were higher than women, and the predominant categories were students and employees. More than two third study sample consume fast foods on a daily basis. In addition, the most of participants were known or had some knowledge about the biochemical component, nutritive value, and calories in fast foods, also the diseases caused by excessive consumption of fast foods. The majority of participants were overweight and obese; the current study reveals a strong positive association between the frequency of fast foods consumption and increased body mass index.
