While based on the frequency, there was a significant relationship between socioeconomic status with western fast food consumption levels with p = 0.00 and local fast food with p = 0.00 influence of friends was significant with western fast food consumption levels in adolescents (p = 0.002). Moreover, adolescents with prosperous socioeconomic status have a higher consumption of fast food was very high with a duration of 1 time/week and 2 times/week. Based on the duration per week, there was a relationship between socio-economic status with the western fast food consumption levels (p = 0.00) and local fast food (p = 0.00). Data analysis by means of descriptive, and Chi Square test (П‡ВІ). The instruments used were questionnaire and FFQ. Dependent variable was the consumption of fast food, and the independent variable was socioeconomic status. The study was observational studies with cross sectional design. To know the relationship of socioeconomic status with fast food consumption levels among adolescents in Mataram city. Fast food is food containing high in calories, fat and low fibers. Adolescent are required to more selective in choosing food products consumed.

Modernization has brought negative impact to the public, including in adolescents directly or indirectly, that has directed the diversion a healthy diet.

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