Abstract：
OBJECTIVE:To assess the phytate intake and molar ratios of phytate to calcium, iron and zinc in the diets of people in China. DESIGN:2002 China Nationwide Nutrition and Health Survey is a cross-sectional nationwide representative survey on nutrition and health. The information on dietary intakes was collected using consecutive 3 days 24 h recall by trained interviewers. SUBJECTS:The data of 68 962 residents aged 2-101 years old from 132 counties were analyzed. RESULTS:The median daily dietary intake of phytate, calcium, iron and zinc were 1186, 338.1, 21.2 and 10.6 mg, respectively. Urban residents consumed less phytate (781 vs 1342 mg/day), more calcium (374.5 vs 324.1 mg/day) and comparable amounts of iron (21.1 vs 21.2 mg/day) and zinc (10.6 vs 10.6 mg/day) than their rural counterparts. A wide variation in phytate intake among residents from six areas was found, ranging from 648 to 1433 mg/day. The median molar ratios of phytate to calcium, iron, zinc and phytate x calcium/zinc were 0.22, 4.88, 11.1 and 89.0, respectively, with a large variation between urban and rural areas. The phytate:zinc molar ratios ranged from 6.2 to 14.2, whereas the phytate x calcium/zinc molar ratios were from 63.7 to 107.2. The proportion of subjects with ratios above the critical values of phytate to iron, phytate to calcium, phytate to zinc and phytate x calcium/zinc were 95.4, 43.7, 23.1 and 8.7%, respectively. All the phytate/mineral ratios of rural residents were higher than that of their urban counterparts. CONCLUSIONS:The dietary phytate intake of people in China was higher than those in Western developed countries and lower than those in developing countries. Phytate may impair the bioavailability of iron, calcium and zinc in the diets of people in China.
journal_name
Eur J Clin Nutrjournal_title
European journal of clinical nutritionauthors
Ma G,Li Y,Jin Y,Zhai F,Kok FJ,Yang Xdoi
10.1038/sj.ejcn.1602513subject
Has Abstractpub_date
2007-03-01 00:00:00pages
368-74issue
3eissn
0954-3007issn
1476-5640pii
1602513journal_volume
61pub_type
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