Nutritional and Toxicological Importance of Macro, Trace, and Ultra-Trace Elements in Algae Food Products

Institute of Nutrition, Friedrich Schiller University, Dornburger Strasse 24, D-07743 Jena, Germany.
Journal of Agricultural and Food Chemistry (Impact Factor: 2.91). 01/2008; 55(25):10470-5. DOI: 10.1021/jf0721500
Source: PubMed


The content of 5 macro elements (Na, K, Ca, Mg, and P), 6 trace elements (Fe, Mn, Zn, Cu, Se, and I), and 4 ultra-trace elements (As, Pb, Cd, and Hg) in 34 edible dried seaweed products of brown algae (Laminaria sp., Undaria pinnatifida, and Hizikia fusiforme) and red algae (Porphyra sp.) originated from China, Japan, and Korea and bought by retail in Germany was determined. The content of these elements was analyzed by spectrometric methods (ICP-AES, ICP-MS, HGAAS, and CVAAS). Assuming a daily intake with 5 g FM of algae, the contribution of the essential elements to the diet is low, with the exception of I. Brown algae contained as much as 1316 +/- 1669 mg of I/kg FM. More than 4000 mg of I/kg FM were found in several Laminaria sp. Moreover, some brown algae, such as Hizikia fusiforme, had high contents of total As (87.7 +/- 8.2 mg/kg FM).

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Available from: Christine Dawczynski
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    • "Protein concentration in seaweeds varies according to some factors, such as different species, environmental conditions and it also depends on the applied method of protein determination (Fountoulakis and Lahm, 1998; Fleurence, 1999; Lourenco et al., 2002 ). In previously studied brown seaweeds , the protein content varied between 5% and 15% of dry matter (Burtin, 2003; Dawczynski et al., 2007). In addition, the protein contents of eight green and red seaweeds have been recorded, from 5.98% to 25.12% (Kailas and Nair, 2015). "
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    • "In recent years, with the evaluation and development of H. fusiforme food and medicines, the typical heavy metal contents determination and analysis in H. fusiforme was gradually attracted people's attention. For the typical heavy metals such as arsenic, lead, cadmium, mercury, zinc and copper, the United Nations, the European Union, Japan and other countries have clear food testing method and evaluation standard (copper ≤ 50 mg/kg) (Besada et al., 2009; Dawczynski et al., 2007; Rodenas et al., 2009), but very few reports of such research appeared in China. Heavy metals such as Cu 2+ and other elements exist in natural seawater at lower concentrations. "
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    • "Dawczynski et al [2] "
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