Oat groats (Avena sativa L.; variety Belinda) were obtained fromLantmännen Cerealia, Moss, Norway. Oat oils of different purities(OPL4 and OPL15, containing approximately 4 and 15% of polar lipids,respectively; and crude oat oil, Ocrude) were a generous gift fromSwedish Oat Fiber (Swedish Oat Fiber AB, Bua, Sweden).