Nutrition got some unexpected attention when Lake Superior State University recently announced that “superfood” appears on the school’s 2013 List of Banished Words. It’s understandable why the college would go all superior on the term. It’s vague, melodramatic and conjures up images of a chicken flying around with a red “S” on its organic chest. Nevertheless, “even though ‘superfoods’ seems like a sensational label, there are foods that have been identified as nutrition powerhouses associated with health,” said Nancy Goodale Graham, a News-Review columnist and registered dietitian with Sacred Heart Medical Center at RiverBend in Springfield. “Across the board, the …