a) Name two food additives needed to keep food wholesome, and say what they do.
b) Name two food additives (or types of additive) which are not necessary for keeping food wholesome.
a) Preservatives like sodium nitrite (cured meat) or sulphur dioxide (fruit juice) might be needed to prevent bacteria growing in food.
b) Artificial colouring and flavouring are not essential, nor are additives which easily cause the food to retain more water.