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Phytate intake and molar ratios of phytate to zinc, iron and calcium in the diets of people in China.
Eur J Clin Nutr 2007; 61(3):368-74EJ

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.

Authors+Show Affiliations

National Institute for Nutrition and Food Safety, Chinese Center for Disease Control and Prevention, Beijing, China. mags@chinacdc.net.cn

Pub Type(s)

Journal Article

Language

eng

PubMed ID

16929240

Citation

Ma, G, et al. "Phytate Intake and Molar Ratios of Phytate to Zinc, Iron and Calcium in the Diets of People in China." European Journal of Clinical Nutrition, vol. 61, no. 3, 2007, pp. 368-74.
Ma G, Li Y, Jin Y, et al. Phytate intake and molar ratios of phytate to zinc, iron and calcium in the diets of people in China. Eur J Clin Nutr. 2007;61(3):368-74.
Ma, G., Li, Y., Jin, Y., Zhai, F., Kok, F. J., & Yang, X. (2007). Phytate intake and molar ratios of phytate to zinc, iron and calcium in the diets of people in China. European Journal of Clinical Nutrition, 61(3), pp. 368-74.
Ma G, et al. Phytate Intake and Molar Ratios of Phytate to Zinc, Iron and Calcium in the Diets of People in China. Eur J Clin Nutr. 2007;61(3):368-74. PubMed PMID: 16929240.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Phytate intake and molar ratios of phytate to zinc, iron and calcium in the diets of people in China. AU - Ma,G, AU - Li,Y, AU - Jin,Y, AU - Zhai,F, AU - Kok,F J, AU - Yang,X, Y1 - 2006/08/23/ PY - 2006/8/25/pubmed PY - 2007/4/24/medline PY - 2006/8/25/entrez SP - 368 EP - 74 JF - European journal of clinical nutrition JO - Eur J Clin Nutr VL - 61 IS - 3 N2 - 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. SN - 0954-3007 UR - https://www.unboundmedicine.com/medline/citation/16929240/Phytate_intake_and_molar_ratios_of_phytate_to_zinc_iron_and_calcium_in_the_diets_of_people_in_China_ L2 - http://dx.doi.org/10.1038/sj.ejcn.1602513 DB - PRIME DP - Unbound Medicine ER -