Magnetic monopoles are extremely massive particles carrying a net magnetic charge, which is a result of predictions made by all the grand unified theories. By combining the grand unified theories with non-inflation scenarios the expected age of the universe is no longer 13.73 billion years old and it becomes about 30,000 years old. Inflation eliminates these monopoles by arranging the parameters so that inflation takes place after or during monopole production, so the monopole density is diluted to a completely negligible level.
Perhaps creationists can use this in an argument for a young universe. Has anyone heard it be used?
 Guth, “Eternal Inflation and Its Implications,” in The Nature of Nature eds. Bruce Gordon and William Dembski (Wilmington, DE: ISI Books, 2011), 490.