The functional food market is undoubtedly developing strongly inmost of the countries and regions of the world where there is an established processed foods market. Limiting the definition of a functional food to foods and drinks that make a specific health claim on pack or in advertising, the market in Europe, the US, Japan and Australia had a combined value of over $5.7 billion in 1999. Of this, Japan accounted for over $2 billion, ahead of Europe and the US, each worth around $1.8 billion.