Metabolic balance of manganese in young women

McLeod, Barbara E.; Robinson, Marion F.

doi:10.1079/bjn19720085

Cited by 27 publications

(10 citation statements)

References 16 publications

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“…The mean Mn intake (2.7 mg/d) corresponded very closely with the 2.8 mg/d reported previously for four women in New Zealand (McLeod & Robinson, 1972) and was within the range of 2-4 mg/d provided by the majority of mixed Western diets (Belz, 1960;North, Leichsenring & Norris, 1960;Schroeder, Balassa & Tipton, 1965;Tipton, Stewart & Dickson, 1969;White, 1969;Kirkpatrick & Coffin, 1974). Intakes of less than 2 mg Mn/d were reported by Gormican (1970) and White & Gynne (1971).…”

Section: Discussionsupporting

confidence: 87%

“…Until recently, the only information on the daily intake of trace elements by New Zealand people came from the analysis of constant diets of four young women participating in a balance study (McLeod & Robinson, 1972;Robinson, McKenzie, Thomson & van Rij, 1973). The concentrations of manganese, copper, zinc and cadmium in some New Zealand foods is now known (Guthrie, 1975) but the lack of information on recent food intake and dietary patterns make it difficult to estimate from food concentrations the intakes of the trace elements for people of different ages.…”

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confidence: 99%

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Daily intakes of manganese, copper, zinc and cadmium by New Zealand women

Guthrie

Robinson

1977

Br J Nutr

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1. A total of 179 duplicate diets were collected by twenty-three women consuming their habitual diet. Twelve of the subjects were living in a residential hall for students, the others were living in their own homes or in flats. Collection periods varied from 3 to 21 d. 2. Average daily intakes were: manganese 2-7 mg; copper 1-5 mg for diets not containing liver, 7-6 mg for fifteen diets containing liver; zinc 10-0 mg; cadmium 21 microgram for diets not containing liver, 27 microgram for fifteen diets containing liver. 3. The intakes were compared with values for adults from other countries and with current recommended dietary allowances or estimated minimum requirements. Mn intakes were typical for non-vegeratian Western diets. Cu and Zn intakes may have been marginally low. The intakes of Cd were low. 4. Daily intakes of protein (71 g), fat (83 g), fat (83 g), carbohydrate (224 g) and energy (8-1 MJ) from 129 of the diets were similar to recent values obtained for New Zealand women. 5. Subjects living in the residential hall had higher intakes of all nutrients than subjects living in their own homes or flats.

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Section: Discussionsupporting

confidence: 87%

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confidence: 99%

Daily intakes of manganese, copper, zinc and cadmium by New Zealand women

Guthrie

Robinson

1977

Br J Nutr

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“…Positive balances were observed in two women with respective mean manganese intakes of 2.48 mg/day and 2.62 mg/day for 27 days (McLeod and Robinson, 1978). In another study with 20 men and 20 women, balances did not differ significantly from zero (0.27 ± 1.07 mg/day in men vs. −0.12 ± 0.49 mg/day in women: not statistically different) when subjects consumed a controlled diet providing 3.51 mg/day of manganese (at an energy intake of 2 000 kcal/day) for four weeks (Finley et al, 1994).…”

Section: Balance Studies On Manganesementioning

confidence: 96%

Scientific Opinion on Dietary Reference Values for manganese

Products¹

2013

EFS2

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Following a request from the European Commission, the Panel on Dietetic Products, Nutrition and Allergies (NDA) derived Dietary Reference Values (DRVs) for manganese. Manganese is an essential dietary mineral which is a component of a number of metalloenzymes involved in amino acid, lipid and carbohydrate metabolism. A specific manganese deficiency syndrome has not been described in humans. The body is able to adapt to a wide range of manganese intakes by regulating both efficiency of absorption in the intestine and the quantity excreted via bile. There are no reliable and validated biomarkers of manganese intake or status and data on manganese intakes versus health outcomes are not available for DRVs for manganese. As there is insufficient evidence available to derive an average requirement or a population reference intake, an Adequate Intake (AI) is proposed. Mean intakes of manganese in adults in the EU are around 3 mg/day. In addition, null or positive balances have consistently been observed with intakes of manganese above 2.5 mg/day. An AI of 3 mg/day is proposed for adults, including pregnant and lactating women. For infants aged from 7 to 11 months, an AI of 0.02-0.5 mg/day is proposed, which reflects the wide range of manganese intakes that appear to be adequate for this age group. The AI for children and adolescents is based on extrapolation from the adult AI using isometric scaling and reference body weights of the respective age groups. Manganese is an essential dietary element for mammals. It is a component of metalloenzymes such as superoxide dismutase, arginase and pyruvate carboxylase, and is involved in amino acid, lipid and carbohydrate metabolism. A specific manganese deficiency syndrome has not been described in humans.Absorption of manganese in the intestine is low (< 10 %). Regulation at the level of absorption appears to be one of the adaptive responses to dietary manganese intake and such regulation allows manganese homeostasis to be maintained over a wide range of intakes. A reduction in the biological half-life of manganese has been observed with increased dietary manganese intakes indicating the role of whole-body turnover rate in manganese homeostasis. Elimination of manganese is primarily via the faeces.The assessment of manganese intake or status using biological markers is difficult owing to the rapid excretion of manganese into bile, to homeostatic mechanisms and to the lack of sensitivity of biomarkers over the normal range of intakes. Therefore, there are no reliable and validated biomarkers of manganese intake or status.Nuts, chocolate, cereal-based products, crustaceans and molluscs, pulses, and fruits and fruit products are rich sources of manganese. The main contributors to the manganese intake of adults are cerealbased products, vegetables, fruits and fruit products and beverages. In the EU, estimated mean manganese intakes of adults range from 2 to 6 mg/day, with a majority of values around 3 mg/day. Estimated mean manganese intakes range from 1.5 to 3.5 mg/day in ...

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“…The manganese retention rate, similar to absorption rate, was 10.2% for men and 3.7% for women. McLeod and Robinson [17] have reported that the manganese absorption rate was ~ 12% for meatloaf, ice cream, and tea. However, North et al [18] showed that the absorption rate was 50% for the group on a low-protein and high-vegetable diet, while Mena et al [19] indicated that the absorption rate of manganese for healthy adults is only 3 -4%.…”

Section: Discussionmentioning

confidence: 99%

Estimated balance status of manganese in healthy young adults

Kim¹,

Kim²,

Choi³

2013

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Manganese is an essential nutrient for human metabolism; however, few studies have been conducted to establish the dietary recommended intake (DRI) for manganese. The purpose of this study is to provide data that ean inform the manganese intake level and address the RI by analyzing the manganese intake of 513 young Korean adults and evaluating the blood levels and estimated .manganese balanee of 51 selected subjects. The average age of the total subjects was 22.6 years for men and 21.6 years for women. The average daily energy intake was 1,758.50 kcal for men and 1,578.5 kcal for women. " In addition, the daily manganese intake was 3,772.7 |ig for men and 3,444.2 Hg for women. The manganese intake of all subjects was lower than the tolerable upper intake. The manganese intake, excretion through urine and feces, retention amount, and retention rate of the selected subjects were 2,922.8 ng, 2,612.2 ng, 331.1 ^g, and 6.7%, respectively, with no significant difference between men and women except urinary excretion (0.34 iigfor men vs. 0.1841g for women, p < 0.05). The manganese intake was positively related with the ' intakes of food, energy, protein, fat, and carbohydrate. Also, the manganese retention amount was positively related with the intakes of energy, protein, and fat. These results show that both food intake and energy intake are important factors for manganese intake and retention.

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Metabolic balance of manganese in young women

Cited by 27 publications

References 16 publications

Daily intakes of manganese, copper, zinc and cadmium by New Zealand women

Daily intakes of manganese, copper, zinc and cadmium by New Zealand women

Scientific Opinion on Dietary Reference Values for manganese

Estimated balance status of manganese in healthy young adults

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