The use of iron pots has decreased the prevalence of anemia.
Objective
To investigate the release of iron, zinc, and lead from metallic iron and zinc bars incubated in water and in meals.
Methods
Iron, zinc, and lead concentrations were measured at different incubation conditions in water and in meals.
Results
The iron concentration in water was 1.26 mg/L after incubation with one iron bar at pH 7 and 100°C for 20 minutes and in meals was 0.97 mg per 100 g of wet meals, rich in phytate, cooking at 100°C during 20 minutes. The maximum contents were 7,720 mg/L of iron and 1,826 mg/L of zinc in vinegar at pH 3 and 20°C after 90 and 32 days, respectively. Lead was released from the bars, but at concentrations well below the upper tolerable limits.
Discussion
In outreach populations, the use of iron and zinc metallic bars in water and meals could contribute to sustainable, very low-cost prevention of iron and zinc deficiencies, and home-fortified vinegar could be used for treatment of both deficiencies.
Conclusions
Field trials should be performed to determine the impact that the use of iron and zinc metallic bars in water and meals might have on the iron and zinc status of population groups.
United Nations Administrative Committee on Coordination/Sub-Committee on Nutrition. Fourth report on the world nutrition situation. January 2000: Nutrition throughout the life cycle. Geneva: ACC/SCN Secretariat, 2000.
2.
UNICEF. State of the world's children. New York: Oxford University Press, 2001.
3.
Grantham-McGregorSAniC. A review of studies on the effect of iron deficiency on cognitive development in children. J Nutr2001;131(2S-2):649S–68S.
4.
PollittEGormanKS. Nutritional deficiencies as developmental risk factors. In: NelsonC, ed. Threats to optimal development. Minnesota Symposia on Child Psychology 1994;27, chapter 6.
5.
AllenLH. Anemia and iron deficiency: Effects on pregnancy outcome. Am J Clin Nutr2000;71(5 suppl): 1280S–4S.
6.
BrownKHPeersonJMRiveraJAllenLH. Effect of supplemental zinc on the growth and serum zinc concentrations of prepubertal children: A meta-analysis of randomized controlled trials. Am J Clin Nutr2002;75:1062–71.
7.
BhuttaZABlackREBrownKHGardnerJMGoreSHidayatAKhatunFMartorellRNinhNXPennyMERosadoJLRoySKRuelMSazawalSShankarA. Prevention of diarrhea and pneumonia by zinc supplementation in children in developing countries: A pooled analysis of randomized controlled trials. Zinc Investigators' Collaborative Group. J Pediatr1999;135:689–97.
8.
SazawalSBlackREMenonVPDhingraPCaulfieldLEDhingraUBagatiA. Zinc supplementation in infants born small for gestational age reduces mortality: A prospective, randomized, controlled trial. Pediatrics2001;108:1280–6.
9.
BrownKHWuehlerSEPeersonJM. The importance of zinc in human nutrition and estimation of the global prevalence of zinc deficiency. Food Nutr Bull2001;22:113–25.
10.
Instituto Nacional de Estadística e Informática. Encuesta demográfica y de salud familiar (ENDES IV). Lima, Peru: INEI, 2000.
11.
YipR. Iron deficiency: Contemporary scientific issues and international programmatic approaches. J Nutr1994;124(8 suppl):1479S–90S.
12.
ReevesJDYipRKileyVADallmanPR. Iron deficiency in infants: The influence of mild antecedent infection. J Pediatr1984;105:874–79.
13.
International Zinc Nutrition Consultative Group. Technical Document (in press).
14.
GibsonR. Zinc nutrition in developing countries. Nutr Res Rev1994;7:151–73.
15.
SandsteadHH. Zinc deficiency. A public health problem?Am J Dis Child1991;145:853–59.
16.
PennyMEMarinRMPeersonJMDuranALanataCFLonnerdalBBlackREBrownKH. Randomized trial of the impact of zinc supplementation, with and without other micronutrients, on the duration of persistent diarrhea and on subsequent morbidity. J Pediatr1999;135:208–17.
17.
BrownKHLanataCFYuenMLPeersonJMButronBLonnerdalB. Potential magnitude of the misclassification of a population's trace element status due to infection: Example from a survey of young Peruvian children. Am J Clin Nutr1993;58:549–54.
Dutra-de-OliveiraJEde AlmeidaCA. Domestic drinking water—An effective way to prevent anemia among low socioeconomic families in Brazil. Food Nutr Bull2002;23(3 suppl):213–6.
20.
LiuDYChenZGLeiHQLuMQLiRLiLX. Investigation of the amount of dissolved iron in food cooked in Chinese iron pots and estimation of daily iron intake. Biomed Environ Sci1990;3:276–80.
21.
AdishAAEsreySAGyorkosTWJean-BaptisteJRojhaniA. Effect of consumption of food cooked in iron pots on iron status and growth of young children: A randomised trial. Lancet1999;353:712–6.
22.
MistryANBrittinHCStoeckerBJ. Availability of iron from food cooked in an iron utensil determined by an in vitro method. J Food Sci1988;53:1546–8.
23.
MartinezFEVannucchiH. Bioavailability of iron added to the diet by cooking food in an iron pot. Nutr Res1986;6:421–28.
24.
BorigatoEVMartinezFE. Iron nutritional status is improved in Brazilian preterm infants fed food cooked in iron pots. J Nutr1998;128:855–9.
25.
GeerligsPPBrabinBMkumbwaABroadheadRCuevasLE. The effect on haemoglobin of the use of iron cooking pots in rural Malawian households in an area with high malaria prevalence: A randomized trial. Trop Med Int Health2002;8:310–5.
26.
AllenLAhluwaliaN. Improving iron status through diet. OMNI/US Agency for International Development, 1997.
27.
Joint FAO/WHO Expert Committee on Food Additives (JEFCA), 1986 and 1993. Provisional tolerable weekly intake (PTWI) of lead. [PDF] Rolling revision of the WHO guidelines for drinking-water quality. www.who.int/entity/water_sanitation_health/dwq/chemicals/petroleum.pdf. Accessed 1 September 2007.
28.
LechtigAGrossRAquinoOGrossU and López de RomañaD. Lessons learned from the scaling-up of a weekly multimicronutrient supplementation program in the Integrated Food Security program. Food Nutr Bull.Vol. 27, No 4, December 2006. S160–64.
29.
SunilSBlackRERamsanMChwayaHMStoltzfusRJDuttaADhingraUKaboleIDebSOthmanMKKaboleFM. Effects of routine prophylactic supplementation with iron and folic acid on admission to hospital and mortality in preschool children in a high malaria transmission setting: Community-based, randomised, placebo-controlled trial. Lancet2006;367:133–43.
