There are so many thousands of these additives that I won’t even be able to cover all the major categories. There are flavours, flavour enhancers, colours, emulsifiers, artificial sweeteners, thickeners, humectants, stabilisers, acidity regulators, preservatives, antioxidants, foaming agents, anti-foaming agents, bulking agents, carbonating agents, gelling agents, glazing agents, chelating agents, bleaching agents, leavening agents, clarifying agents and so