Eliminates the need for additives such as bah, but, sulfur dioxide, sorbets, benzoates, etc. * Use with gas flushing/vacuum packaging to absorb virtually all oxygen and absorb any oxygen that may permeate the package * Significantly improves keeping qualities of polyunsaturated fats and oils * Helps retain fresh-roasted flavor of coffee and nuts * Eliminates the need for additives such as BHA, BHT, sulfur dioxide, sorbets, benzoates, etc. * Prevents oxidation of spice oleoresins present in spices themselves and in seasoned foods; Prevents oxidation of vitamins A, C and E.The Oxygen Indicators are suppose to be Pink (indicates there is no oxygen in the package). When they turn Dark Purple it lets you know the product is no goo and has expired.