Influence of tea drinking on manganese intake, manganese status and leucocyte expression of MnSOD and cytosolic aminopeptidase P

Hope, Stephen J.; Daniel, Katie; Gleason, Kelly; Comber, Sean; Nelson, Michael; Powell, J.

doi:10.1038/sj.ejcn.1602260

Cited by 51 publications

(42 citation statements)

References 23 publications

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“…Thus, in leaf samples with high Mn levels, greater attention should be paid to the contribution to the daily intake rates, especially with TUI index. Hope et al (2006) found that in the infusion of black tea leaves Mn content is commonly found exceeding the RDA value, and in some cases even exceeding the TUI. The low contribution of fruits to the RDA, as compared with leaves, is related to the Mn contents in the fruits being 88% lower than the leaf content (Figure 2).…”

Section: Resultsmentioning

confidence: 99%

Composition, Hot-Water Solubility of Elements and Nutritional Value of Fruits And

et al. 2015

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Yerba mate leaves are the most studied and used parts of the tree, while fruits have been little investigated as to their elemental composition. The objective of this study was to characterize the composition, the hot-water solubility of the elements and the nutritional value of yerba mate (Ilex paraguariensis St. Hill) fruits and leaves. Both fruits and leaves were collected from four yerba mate provenances (cities of Cascavel, Quedas do Iguaçu and Ivaí in Paraná state and Barão de Cotegipe in Rio Grande do Sul state) 17 years of age, grown in the city of Pinhais, Paraná state, Brazil. The total and hot water-soluble contents of 22 and 20 elements, respectively, were determined. The elemental composition of the fruits presented the following decreasing order: C, K, N, Mg, Ca, P, Al, Na, Zn, Mn, Fe, Ba, Cu, Ni, Mo, Pb, Cr, As, Co, Ag, V and Cd. For the leaves the decreasing order was: C, N, K, Ca, Mg, P, Al, Mn, Na, Fe, Zn, Ba, Cu, Ni, Pb, Cr, Mo, As, Co, Ag, V and Cd. It was found than 2 to 8 elements in the fruit presented greater water solubility than in the leaves. In case of consumption via infusion of the fruits or leaves, there would be nutritive value for K, Mg, P, Mn, Cr, Mo, Cu and Zn, while consumption of capsules would have nutritive value only for Mn via the leaves. In general, the fruits have more distinct elemental composition, hot-water solubility and nutritional value than yerba mate leaves.

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Section: Resultsmentioning

confidence: 99%

Composition, Hot-Water Solubility of Elements and Nutritional Value of Fruits And

et al. 2015

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“…Tea is an important source of manganese and chromium which are essential nutrients required for normal metabolism [6][7][8][9]. Mean chromium intakes from food and water range from 52 to 943 μg/day.…”

Section: Compoundmentioning

confidence: 99%

“…Polyphenols are the most biologically active group of tea components which have antioxidative, antimutagenic and anticarcinogenic effects [4,5]. But there are other compounds in green tea with interest for human health like fluoride, caffeine, minerals and trace elements like, chromium and manganese [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Chemical Composition of Green Tea (Camellia sinensis) Infusions Commercialized in Portugal

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Mota-Filipe

et al. 2007

Plant Foods Hum Nutr

141

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To evaluate the potential benefits and risks associated with tea consumption it is important to identify the constituents of this beverage. Levels of some minerals, caffeine and catechins in green tea samples commercialized in Portugal were evaluated. Potassium is the metal present in larger amount (92-151 mg/l). The content of sodium, calcium, fluoride, aluminium, manganese and iron were 35-69, 1.9-3.5, 0.80-2.0, 1.0-2.2, 0.52-1.9, 0.020-0.128 mg/l, respectively. Chromium and selenium were not detected. The resulting data showed considerable variability in catechins content. The levels of epigallocatechin gallate (EGCG) ranged from 117 to 442 mg/l, epicatechin 3-gallate (EGC) from 203 to 471 mg/l, epigallocatechin (ECG) from 16.9 to 150 mg/l, epicatechin (EC) from 25 to 81 mg/l and catechin (C) from 9.03 to 115 mg/l. Caffeine contents in the green tea infusions studied were between 141-338 mg/l. Green tea infusions provide significant amounts of catechins and could be an important source of some minerals.

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“…However, no evidence is available on the effects of manganese depletion on the activity of manganese-dependent enzymes in humans. Hope et al (2006) determined the influence of tea drinking on manganese intake, on fasting manganese concentrations in plasma and whole blood and on leucocyte expression of MnSOD and aminopeptidase P in 24 tea drinkers and 28 controls. Mean manganese intake as assessed by a food frequency questionnaire (FFQ) was significantly lower in non-tea drinkers (3.2 mg/day) than in tea drinkers (5.5 or 10 mg/day, depending on the value used for the manganese content of black tea).…”

Section: Biomarkers Of Intake and Statusmentioning

confidence: 99%

Scientific Opinion on Dietary Reference Values for manganese

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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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Influence of tea drinking on manganese intake, manganese status and leucocyte expression of MnSOD and cytosolic aminopeptidase P

Cited by 51 publications

References 23 publications

Composition, Hot-Water Solubility of Elements and Nutritional Value of Fruits And

Composition, Hot-Water Solubility of Elements and Nutritional Value of Fruits And

Chemical Composition of Green Tea (Camellia sinensis) Infusions Commercialized in Portugal

Scientific Opinion on Dietary Reference Values for manganese

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