Background: COVID-19 pandemic has had a great effect on the adolescents' dietary and life style habits. 
Aim: Explore adolescent' dietary changes and lifestyle habits during COVID-19 pandemic Design: 
Correlational-descriptive study design. Setting: This study was conducted at Suez Canal University, Faculty 
of Nursing in Ismailia City. Subjects: A convenient sample (500 students) of first year students of Faculty of 
Nursing, Suez Canal University for academic year 2021/2022. Tools: The structured questionnaire created in 
Google Form. Results: There was statistically significant differences regarding mean of mediterranean diet 
adherence screener scores and dietary habits before and during COVID-19. There were statistically significant 
differences regarding sleeping hours and electronic devices spent hours, while there were no statistically 
significant differences regarding smoked cigarettes and sport times. Conclusion: There were statistically 
significant negative correlations between mediterranean diet adherence screener and body mass index before 
and during COVID-19. There were statistically significant differences between level of mediterranean diet 
adherence screener scores and sport times and electronic devices spent hours before COVID-19. Also; there 
were statistically significant difference between level of mediterranean diet adherence screener scores and 
sleep hours and electronic devices spent hours during COVID-19. Recommendations: The study, emphasized 
on the importance of educating the adolescents about healthy diet, adequate sleep hours, practicing exercise 
and proper use of social media. Also; further studies should be conducted to analyze eating habits and life 
style to encourage the adoption of healthy diet and life style among adolescents