The principle and common name of preservatives

Meanwhile, antioxidant preservatives prevent the chemical changes that can give food an off-flavor or color.Smoke has been used to preserve food for millennia because some of the aromatic compounds in wood smoke are antioxidants.Combining smoking with salting was an effective way of preserving meat before refrigeration.For antioxidant activity without a smoky flavor,there are compounds like BHT and tocopherol,better known as vitamin E.