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Breakfast is an activity of eating and drinking between waking up to 9 am to fulfill some of the daily nutritional needs(15-30% nutritional needs). The benefits of breakfast are maintaining an ideal body weight because breakfast canreduce the amount of food you eat throughout the day. The purpose of this study was to find out the description ofbreakfast and Body Mass Index (BMI) in students of the Faculty of Medicine, University of Riau in 2017. This researchwas descriptive study with 121 samples. The results showed 16.3% obese I and 8.1% obese II. Respondents with goodbreakfast calories tend to have good nutritional status of 50.0%.

Background Obesity can occur due to the accumulation of excess fat in the body.Obesity has been declared as a global epidemic by the World Health Organization (WHO). In 2016, more than 1,9 billions adults were overweight. In 2018, it was found that 24,1% of adults in Riau Province were obese with an incidence higher in women than men. Research Objectives This research is an analytical study to determine the comparison of nutritional status based on the data that has been collected from body mass index (BMI) measurement and body fat percentage measurement by DXA Scan, which was carried out on 364 adults aged 19-65 years. Metodology The data that has been obtained from BMI measurement will be grouped to four categories and the data that has been obtained from body fat percentage will be grouped to five categories based on their gender. The bivariate analysis using paired T Test will be done to see the p value. Conclusion From this study, it was found that most of the  subjects were obese. According to the BMI examination, about 50,27% of the subjects were  categorized as obese. Meanwhile, according to the body fat percentage measurement using DXA Scan, about 89,56% of subjects were included in the obese category. Based on the p value of 0,001 that obtained from the paired t test, it can be concluded that there are significant differences between these two methods.   Keywords : BMI, DXA Scan, nutritional status, obese