The National Capital Region's (NCR) teenage population's health is the focus of this study on the effects of fast food eating. In order to determine how often teenagers in the NCR ate fast food, a sample of them was surveyed. In addition, physical and mental health markers were assessed through health assessments. The results show that teenagers consume fast food at a worrying rate, which has consequences for their physical and mental health. Frequent intake of fast food is linked to negative physical health indicators like high blood pressure and cholesterol, according to analysis of health outcomes. Fast food intake has also been linked to mental health problems, such as an increased risk of anxiety and depression. These findings highlight how critical it is to address fast food consumption among teenagers in the NCR by means of focused interventions and public health campaigns meant to encourage better eating practices and enhance general health.