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Background  This study aims to examine the effects of the request and purchase of Television (TV) advertised foods on children’s dietary intake, overweight and obesity in China.    Methods  Data from 1417 children (aged 6–17 years) in the 2011 China Health and Nutrition Survey were analysed. The request and purchase of TV advertised foods were assessed through the frequency of children’s requests to purchase TV advertised foods and the frequency of parents’ purchases of these advertised foods, as well as the frequency of children’s purchases of TV advertised foods. The height and weight of children were measured. Logistic regression models were used to identify the associations between the request and purchase of TV advertised foods and overweight/obesity of children.    Results  The request and purchase of TV advertised foods were positively associated with children’s dietary intake of energy, protein, fat and carbohydrates. After adjusting for potential confounding factors, children’s request and purchase of TV advertised foods and parent’s purchase of TV advertised foods were positively associated with children’s overweight/obesity: odds ratio (OR) and 95% confidence interval (CI) for overweight/obesity were: 1.46 (1.01–2.11) for children purchasing advertised foods ≥1 time/week, 1.59 (1.15–2.18) for parents purchasing advertised foods for their children ≥1 time/week and 1.39 (1.00–1.95) for children requesting advertised foods ≥1 time/week.    Conclusions  The request and purchase of TV advertised foods are associated with children’s dietary intake. Moreover, the request and purchase of TV advertised foods can increase the risk of overweight and obesity of children. Health education involving children’s request and purchase of TV advertised foods and parents’ purchase of TV advertised foods should be considered in China.    Supplementary Information  The online version contains supplementary material available at 10.1186/s12889-021-11191-z.

Influence of the request and purchase of television advertised foods on dietary intake and obesity among children in China