Estimation of available dietary iron

Monsen, Elaine R; Hallberg, Leif; Layrisse, Miguel; Hegsted, D. M.; Cook, James D.; Mertz, Walter; Finch, Clement A.

doi:10.1093/ajcn/31.1.134

Cited by 529 publications

(330 citation statements)

References 26 publications

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“…It has been shown that physiological adaptation occurs after blood loss at delivery with an increase in iron absorption in postpartum women. Iron status of an individual is the main factor affecting iron absorption (Monsen et al, 1978). Absorption increases as iron stores become depleted and decreases as stores increase (Herbert, 1987).…”

Section: Discussionmentioning

confidence: 99%

Postnatal iron status of Hong Kong Chinese women in a longitudinal study of maternal nutrition

et al. 2001

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Objective: To report postnatal iron nutritional status of Hong Kong Chinese women during the ®rst 6 months postpartum. Design and subjects: A longtitudinal study examining postnatal calcium and iron status of Hong Kong Chinese breastfeeding and formula-feeding women was conducted during 1998. Postpartum women aged 20 ± 40 y, with no bone or blood disorders were recruited and interviewed at 0 (baseline), 2, 6 weeks, 3 and 6 months postpartum. Dietary intake was assessed by a 3 day dietary record and cross checked by a 24 h recall. Complete blood count and serum ferritin level were measured to assess anaemia and iron status. In this report, subjects were divided into an anaemic group (haemoglobin level`10 gadl) and a non-anaemic group (haemoglobin level ! 10 gadl) according to baseline haemoglobin levels. Results: At baseline, 13a47 (27.7%) subjects were anaemic. Two of these 13 anaemic subjects were still anaemic at 3 and 6 months postpartum. Anaemic subjects showed signi®cantly (P`0.01) greater amounts of blood loss and a higher rate of primary postpartum haemorrhage than the non-anaemic subjects. Daily food intake and dietary nutrient intake did not differ signi®cantly between the two groups. During the ®rst 6 weeks postpartum, subjects in both groups consumed more poultry and egg, and comparable amounts of meat, compared with women in the Hong Kong general population. Iron and vitamin C intakes for the majority of subjects reached 60% of the US Recommended Daily Allowances. Regression analysis suggested that the rate of change in haemoglobin level in the ®rst 6 weeks postpartum was positively correlated with baseline MCV level and serum ferritin level, but negatively correlated with baseline haemoglobin level. Conclusions: Blood loss at delivery is an important factor for postpartum anaemia. Postnatal recovery of iron status of this group of women appeared to be more related to physiological factors than to dietary factors. The role of diet as well as other physiological changes in postpartum women requires further investigation. Finding ways to minimise blood loss at delivery could be the most practical strategy to reduce the rate of postpartum anaemia.

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Section: Discussionmentioning

confidence: 99%

Postnatal iron status of Hong Kong Chinese women in a longitudinal study of maternal nutrition

et al. 2001

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“…Haem Fe was assumed to constitute 40 % of total Fe (31) , including that in meat and fish. The remaining total Fe intake was assumed to be non-haem Fe.…”

Section: Dietary Assessmentmentioning

confidence: 99%

Iron intake does not significantly correlate with iron deficiency among young Japanese women: a cross-sectional study

Asakura

Sasaki

Murakami

et al. 2009

Public Health Nutr.

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Objectives: We evaluated the association of nutrient intake with Fe deficiency with regard to lifestyle factors and health condition in young Japanese women. Uniquely among developed countries, dietary habits render Japanese populations vulnerable to Fe deficiency, owing to their relatively low intake of Fe and high intake of Fe absorption inhibitors, such as green tea and soyabeans. Design: A cross-sectional study. Setting and subjects: The subjects were 1019 female Japanese dietetic students aged 18-25 years. Dietary habits during the preceding month were assessed using a previously validated, self-administered, diet history questionnaire. Blood analysis was performed to assess body Fe status. Subjects were categorized with Fe deficiency when their serum ferritin levels were ,12 ng/ml. Twenty-nine dietary variables, i.e. intakes of energy, sixteen nutrients including Fe and twelve food groups, were analysed using multivariate logistic regression models adjusted for possible confounders. Results: Of the subjects, 24?5 % were categorized with Fe deficiency. However, no dietary factors assessed were significantly associated with Fe deficiency. The risk of Fe deficiency was significantly lower in women with infrequent or no menstrual cycles than in those with regular cycles (OR 5 0?58; 95 % CI 0?34, 1?00) and significantly higher in women with heavy menstrual flow than in women with average flow, albeit that these were self-reported (OR 5 1?83; 95 % CI 1?35, 2?48). Conclusions: These results suggest that dietary habits, including Fe intake, do not significantly correlate with Fe deficiency among young Japanese women.

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“…For non-haem iron, bioavailability was determined for each meal using an algorithm based on Monsen et al (1978) and modified by Murphy et al (1992). Starting with a basal percentage bioavailability of 5%, bioavailability was increased by the meal content of meat=fish=poultry protein (>9 g=4.18 MJ, þ5%; >27 g=4.18 MJ, þ10%) and ascorbic acid (>35 mg=4.18 MJ, þ5%; >105 mg=4.18 MJ, þ10%), and decreased by tannin-containing teas and coffees (250 g standard strength beverage, 720% of percentage bioavailability, to a maximum of 60% per meal).…”

Section: Determination Of Nutrient Intakes From Complementary Foodsmentioning

confidence: 99%

Complementary feeding practices and dietary intakes from complementary foods amongst weanlings in rural Malawi

Hotz

2001

Eur J Clin Nutr

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Objective: The objectives of this study were to estimate the quantity and nutritive quality of the complementary diet in rural Malawi, and to identify feeding practices, nutrients and dietary modifiers of iron and zinc bioavailability that may limit the quality of the diet. Design: This cross-sectional study design included an anthropometric survey, a feeding practices questionnaire, and an interactive, 24 h recall dietary data survey. Setting: Four rural villages in Balaka district, southern Malawi. Subjects: Mothers resident in the study communities with breastfed children aged up to 24 months were eligible. Results: Stunting was prevalent among these weanlings. Maize was the predominant food source, with limited contribution of animal foods. Deficits in dietary energy and several nutrients were found when compared to estimated needs. When expressed per kg body weight, energy intakes appeared adequate. The bioavailability of zinc was low due to a high phytate:zinc molar ratio. Iron bioavailability was also low due to low intake of absorption enhancers such as meat=fish=poultry protein and ascorbic acid. Dietary quality was poorest for 6 to 8-month-old infants. Conclusions: Iron, zinc and calcium were the most limiting nutrients to the quality of the diet, partly exacerbated by the poor bioavailability of iron and zinc. Increased total intake and bioavailability of iron and zinc would improve the complementary diets.

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Estimation of available dietary iron

Cited by 529 publications

References 26 publications

Postnatal iron status of Hong Kong Chinese women in a longitudinal study of maternal nutrition

Postnatal iron status of Hong Kong Chinese women in a longitudinal study of maternal nutrition

Iron intake does not significantly correlate with iron deficiency among young Japanese women: a cross-sectional study

Complementary feeding practices and dietary intakes from complementary foods amongst weanlings in rural Malawi

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