We take all-natural seriously! Bubbies horseradishes are fortified using natural mustard oil, not the artificial stuff often hidden in ingredients like "soybean oil" and "flavoring." Our horseradishes are OU Kosher certified, made with gluten free vinegar and produced in a gluten free facility. The pungent flavor adds zest and color to any meal and they continue the high quality for which all Bubbies' products are known.