Not all products you find in the grocery store require kosher certification. Some products are simply kosher by their nature. Below is a list of common items you might come across when shopping that do not require kosher certification:
Baking Powder
Baking Soda
Barley
Carrots (raw, sliced, baby, shredded)
Cocoa powder
Coffee beans: whole or ground, unflavored (regular or decaf)
Coffee, Instant: unflavored (regular or decaf)
Dish soaps and cleaners
Flour
Foil products
Mushrooms, sliced
Oats
Paper and plastic disposables
Popcorn kernels
Raw Beans and lentils
Rice (raw or parboiled)
Sugar (white, brown, powdered, confectioners)
Water