Background: Fast food consumption is being significantly affecting physical and mental health of children and adolescent. Unhealthy diet is designated as the major cause of various medical illness. Among these most common is obesity. This also leads to anxiety, sleep disorder, verbal abuse and hence responsible for mental issues as well.

Aim: To observe factors affected by fast food consumption among youngsters.

Methodology: A cross-sectional study design was used to conduct a study for factor analysis of physical and mental health issues related to fast food consumption at a private medical college in Lahore, Pakistan. The data was collected using self-designed questionnaire to collect information about the physical health, mental health, routine exercise, workout and fast -food consumption attitude.

Results: Exploratory Factor Analysis (EFA) was used to access the total explained variation through varimax rotation. Kaiser-Meyer Olkin (KMO) and Bartlett test of sphericity was seen to have a p-value 0.000 which is significant. Significant results of KMO and Bartlett test allows for EFA. It has been seen that thirteen factors contributed to explain more than 70% of the variation

Conclusion: Most commonly affected factors were physical and mental well-being that explained maximum variation. These factors comprised minor mental issues like emotional health, anger, mood swings and anxiety and physical health such as worse effect on health, less physical activity/ inactivity and irregular exercise. Major

Keywords: Fast food, Mental Health, Obesity, Physical Health, Risk.