Commercial extract of the brown seaweed Ascophyllum nodosum enhances phenolic antioxidant content of spinach Crops, Seaweed extracts, Spinach, Di Fan, D. Mark Hodges, Junzeng Zhang, Christopher W. Kirby, Xiuhong Ji, Steven J. Locke, Alan T. Critchley, Balakrishnan Prithiviraj View Research