Food additives represent a major supply sector for the $2,000 billion international processed foods market, with total sales of additives estimated at around $20 billion a year. The largest single sectors within the additives market are flavours, worth $5 billion a year, hydrocolloids, worth $2.82 billion, flavour enhancers, worth around $2.5 billion, and acidulants, worth $2.16 billion.