Status of iodine content of common foods in different geographical areas in Fujian Province

Abstract

Objective To determine the iodine content of common foods in different geographical areas （coastal city, coastal rural area, mountainous city and rural area） in Fujian Province and provide basic data for evaluation of dietary iodine intake. Methods In 2010, based on the types of food of the total diet study, one food sample （consumption rate is greater than 1%） was collected in coastal city （Taijiang）, coastal rural area （Xiang＇an）, mountainous city （Sanyuan） and rural area （Mingxi）. These foods including cereal, beans, potato, meat, eggs, milk, aquatic products, vegetables, fruitS, sugar, be~;erages, liquor and seasoning, and so on 184 kinds of common foods. The iodine content of these food was tested by As （ III ）-Ce4＋ catalytic spectrophotometry. Results Among the 184 kinds of food tested, 164 were not indicated food iodine content in the ＂Chinese Food Composition Tables＂ （2004）. The iodine content of common food in Fujian Province in descending order were salt （30 000 μg/kg）, aquatic products（341.4 μg/kg）, eggs（255.9 μg/kg）, dairy（106.7 μg/kg）, meat（103.2 μg/kg）, cereals （40.7 μg/kg）, vegetables（30.7 μg/kg）, beans（12.9 μg/kg）, sugar（8.5 μg/kg）, fruits（6.7 μg/kg）, potatoes（2.4 μg/kg） and alcohol（2.1 μg/kg）. The iodine content of kelp and laver was the highest in all the food, which was 314 780.1, 176 956.5 μg/kg, respectively. The iodine content of food from animal（241.4 μg/kg） was much higher than that of the food from plant（25.4 μg/kg）. The iodine content of common cereals, potatoes, beans, sea algae, meat, eggs and aquatic products was compared in the four areas, and the difference was not statistically significant （M = 135.5, 20.0, 42.0, 16.0, 54.0, 4.0, X2 = 1.4, all P 〉 0.05）. The iodine content of vegetables and fruits was compared, and the difference was statistically significant （X2 = 8.5, M = 204.5, all P 〈 0.05）. Conclusion The iodine content of different foods is different. Key words: Residents; Diet; Food; Iodine