Muffins and bagels are acid-forming. Unless you add enough raisins. Or other alkalizing ingredients. See the Acid-Alkaline Bagels and English Muffins PRAL List.
Acid-Alkaline Ready-To-Eat Cereal, higher sugar PRAL List
Are ready-to-eat cereals acidic or alkaline? Almost a third are alkaline so the choice is yours. See Acid-Alkaline Ready-to-eat cereal, higher sugar PRAL List.