Effect of soaking and inositol phosphate content on in vitro mineral availability in edible seaweeds

Seaweeds are an ideal food-safe natural source of minerals with a potential use in human nutrition. However, the presence of phytate and different treatments before consumption could modify mineral availability. The content and in vitro mineral availability after a simulated gastrointestinal digesti...

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Veröffentlicht in:Journal of applied phycology 2019-06, Vol.31 (3), p.1981-1989
Hauptverfasser: Sánchez-Moya, Teresa, Martínez-Hernández, Valerie M., López-Nicolás, Rubén, González-Bermúdez, Carlos A., Ros-Berruezo, Gaspar, Frontela-Saseta, Carmen
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container_end_page 1989
container_issue 3
container_start_page 1981
container_title Journal of applied phycology
container_volume 31
creator Sánchez-Moya, Teresa
Martínez-Hernández, Valerie M.
López-Nicolás, Rubén
González-Bermúdez, Carlos A.
Ros-Berruezo, Gaspar
Frontela-Saseta, Carmen
description Seaweeds are an ideal food-safe natural source of minerals with a potential use in human nutrition. However, the presence of phytate and different treatments before consumption could modify mineral availability. The content and in vitro mineral availability after a simulated gastrointestinal digestion of wakame ( Undaria pinnatifida ), nori ( Porphyra spp.), sea salad ( Ulva lactuca , Palmaria palmata , Undaria pinnatifida , Porphyra spp . , Laminaria spp . ), and sea spaghetti ( Himanthalia elongata ) were studied. Experiments were assessed after a soaking treatment of seaweeds with cold (20 °C) or hot (70 °C) water, as usually processing before eating. Moreover, inositol phosphate content was determined in the edible macroalgae and the molar ratio phytate/mineral was used as a predictor of the relative availability of minerals. Overall, edible analyzed seaweeds showed a high Ca, Fe, P, and K contents, highlighting wakame for all the studied minerals. In all cases, soaking in cold water showed the highest soluble and dialyzable mineral fractions. High content of phytic acid (IP6) was observed in sea salad (≈ 25 mg (100 g) −1 ); meanwhile, sea spaghetti showed the lowest IP6 content (3.9 mg (100 g) −1 ). The low molar ratios Phy/Ca and Phy/Zn obtained in seaweeds could indicate an adequate availability. However, ratios Phy/Fe could compromise the iron availability in wakame, nori, and sea spaghetti. Results obtained confirm that external factor such as soaking, gastrointestinal digestion, and inositol phosphates can affect the mineral availability. Consumption of edible seaweeds can be recommended for the necessary intake of available minerals and trace elements.
doi_str_mv 10.1007/s10811-018-1677-x
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However, the presence of phytate and different treatments before consumption could modify mineral availability. The content and in vitro mineral availability after a simulated gastrointestinal digestion of wakame ( Undaria pinnatifida ), nori ( Porphyra spp.), sea salad ( Ulva lactuca , Palmaria palmata , Undaria pinnatifida , Porphyra spp . , Laminaria spp . ), and sea spaghetti ( Himanthalia elongata ) were studied. Experiments were assessed after a soaking treatment of seaweeds with cold (20 °C) or hot (70 °C) water, as usually processing before eating. Moreover, inositol phosphate content was determined in the edible macroalgae and the molar ratio phytate/mineral was used as a predictor of the relative availability of minerals. Overall, edible analyzed seaweeds showed a high Ca, Fe, P, and K contents, highlighting wakame for all the studied minerals. In all cases, soaking in cold water showed the highest soluble and dialyzable mineral fractions. High content of phytic acid (IP6) was observed in sea salad (≈ 25 mg (100 g) −1 ); meanwhile, sea spaghetti showed the lowest IP6 content (3.9 mg (100 g) −1 ). The low molar ratios Phy/Ca and Phy/Zn obtained in seaweeds could indicate an adequate availability. However, ratios Phy/Fe could compromise the iron availability in wakame, nori, and sea spaghetti. Results obtained confirm that external factor such as soaking, gastrointestinal digestion, and inositol phosphates can affect the mineral availability. 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However, the presence of phytate and different treatments before consumption could modify mineral availability. The content and in vitro mineral availability after a simulated gastrointestinal digestion of wakame ( Undaria pinnatifida ), nori ( Porphyra spp.), sea salad ( Ulva lactuca , Palmaria palmata , Undaria pinnatifida , Porphyra spp . , Laminaria spp . ), and sea spaghetti ( Himanthalia elongata ) were studied. Experiments were assessed after a soaking treatment of seaweeds with cold (20 °C) or hot (70 °C) water, as usually processing before eating. Moreover, inositol phosphate content was determined in the edible macroalgae and the molar ratio phytate/mineral was used as a predictor of the relative availability of minerals. Overall, edible analyzed seaweeds showed a high Ca, Fe, P, and K contents, highlighting wakame for all the studied minerals. In all cases, soaking in cold water showed the highest soluble and dialyzable mineral fractions. High content of phytic acid (IP6) was observed in sea salad (≈ 25 mg (100 g) −1 ); meanwhile, sea spaghetti showed the lowest IP6 content (3.9 mg (100 g) −1 ). The low molar ratios Phy/Ca and Phy/Zn obtained in seaweeds could indicate an adequate availability. However, ratios Phy/Fe could compromise the iron availability in wakame, nori, and sea spaghetti. Results obtained confirm that external factor such as soaking, gastrointestinal digestion, and inositol phosphates can affect the mineral availability. 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High content of phytic acid (IP6) was observed in sea salad (≈ 25 mg (100 g) −1 ); meanwhile, sea spaghetti showed the lowest IP6 content (3.9 mg (100 g) −1 ). The low molar ratios Phy/Ca and Phy/Zn obtained in seaweeds could indicate an adequate availability. However, ratios Phy/Fe could compromise the iron availability in wakame, nori, and sea spaghetti. Results obtained confirm that external factor such as soaking, gastrointestinal digestion, and inositol phosphates can affect the mineral availability. Consumption of edible seaweeds can be recommended for the necessary intake of available minerals and trace elements.</abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><doi>10.1007/s10811-018-1677-x</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0001-6325-8672</orcidid></addata></record>
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subjects Algae
Availability
Biomedical and Life Sciences
Calcium
Cold water
Computer simulation
Dialysis
Dietary minerals
Digestion
Digestive system
Ecology
Food sources
Freshwater & Marine Ecology
Gastrointestinal tract
Human nutrition
Inositol phosphate
Inositol phosphates
Iron
Life Sciences
Minerals
Nutrition
Pasta
Phosphates
Phytic acid
Plant Physiology
Plant Sciences
Porphyra
Ratios
Seaweeds
Soaking
Trace elements
Undaria pinnatifida
Zinc
title Effect of soaking and inositol phosphate content on in vitro mineral availability in edible seaweeds
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