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J Agric Food Chem. 2017 Dec 13;65(49):10685-10692. doi: 10.1021/acs.jafc.7b04688. Epub 2017 Dec 5.

Bioactive Compounds of Edible Purple Laver Porphyra sp. (Nori).

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Department of Agricultural, Life and Environmental Sciences, Faculty of Agriculture, Tottori University , Tottori 680-8553, Japan.
Department of Food Quality and Safety, College of Food Science, Northeast Agricultural University , Harbin 150030, China.


Porphyra sp. (nori) is widely cultivated as an important marine crop. Dried nori contains numerous nutrients, including vitamin B12, which is the only vitamin absent from plant-derived food sources. Vegetarian diets are low in iron and vitamin B12; depletion of both causes severe anemia. Nori also contains large amounts of iron compared with other plant-derived foods and eicosapentaenoic acid, which is an important fatty acid found in fish oils. In nori, there are also many bioactive compounds that exhibit various pharmacological activities, such as immunomodulation, anticancer, antihyperlipidemic, and antioxidative activities, indicating that consumption of nori is beneficial to human health. However, Porphyra sp. contains toxic metals (arsenic and cadmiun) and/or amphipod allergens, the levels of which vary significantly among nori products. Further evidence from human studies of such beneficial or adverse effects of nori consumption is required.


Porphyra sp.; iron; nori; plant-derived food; purple laver; vitamin B12

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