The term literature review refers to an extensive and systematic examination of publications relevant to research project. Before starting any research, a literature review of previous studies and experiences related to the proposed investigation must be done.
Studies related to:
1. Changing trends in adolescents’ eating pattern.
2. Promoting factors of junk food
3. Health hazards of junk food
4. Effectiveness of Health Teaching Programme
Studies Related to Changing Trends in Adolescents’ Eating Pattern:
A National Health and Nutrition Examination survey was conducted in USA to determine the adolescent’s beverage consumption trends and causes. The sample consisted of 73, 345 individuals aged 12-16 years. The results of the study showed that, for this age group sweetened beverage consumption increased and milk consumption decreased. Over all energy intake from sweetened beverages increased by 85% and was reduced by 38% for milk, with a 278 total calorie increase. This trend was associated with increased proportion of adolescents consuming sweetened beverages, and reduction in milk consumption. This study recommended the beneficial impacts of reduced soft drink and fruit drink intake
A cross sectional study was conducted in USA to describe foods and beverages consumed at schools in terms of number of serves. The data have been collected from 1001 children aged 4-12yrs. Food and beverage intake was assessed using a school food checklist. The result of the study showed that 39% of children had fruit bars, 59% had packed snacks (potato, corn chips) and 26% had chocolates during their lunch and coffee breaks. Ten percent of children reported using the canteen and fast foods were the most frequently purchased items. A reduction in energy dense snacks and the promotion of healthy sandwiches would improve the healthiness of school lunch
.
A study to determine the food habits of teenagers and important food sources of