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[Sugar content in common prepackaged sugary foods sampling from supermarkets].

OBJECTIVE
To analyze the content of sugar in the sugary foods in China, in order to provide data for further assessment of the level of consumption of sugar among residents.


METHODS
The most common sugary foods, including drinks, biscuits, pastries, milk and dairy products, sugar, candy, and so on, were randomly collected. The content of galactose, glucose, fructose, sucrose, lactose, maltose were determined by chromatographic method. In addition, the content of the sugar was compared with the content in the US food. All measurement data was classified based on the national standard classification of sugary foods, the level of content of sugar in the foods of same class, sugar nutrition claims as well.


RESULTS
The content of sugar varied significantly in different kinds of sugary food, the content of total sugar in the drinks ranged of 3. 00-34. 9 g/100 g( mL), the content of total sugar in the biscuits was in the range of 2. 39-27. 2 g/100 g, the content of total sugar in the processing pastry was in the range of 10. 5-19. 8 g/100 g, the content of total sugar in the bread was in the range of 7. 97-18. 4 g/100 g, the content of total sugar in the milk and dairy products was in the range of 6. 09-45. 1 g/100 g( mL), the content of total sugar in the milk and dairy products was in the range of 11. 6-42. 0 g/100 g. Among the other sugary foods, plain oatmeal contained the minimum content of total sugar( 2. 25 ± 0. 23 g/100 g), while the maximum content of total sugar was in jam( 65. 9 ± 7. 06 g/100 g). When compared with the US content data, the content of total sugar in our ice cream, pastry and non-biscuit was less than that in the US food( P < 0. 05), while the content of total sugar in China's whole wheat bread and soda cracker was higher than that in the US food( P < 0. 05).


CONCLUSION
The sugar composition is related to the certain category of sugary foods. Sucrose is the most widespread type of sugar in sugary food of this study, and the content of sucrose in the biscuits, pastry and candy is higher than that in the other foods. There are significant differences of the content of total sugar between Chinese biscuits, breads and icecream and the same kind of American sugary foods.