The price of rice has doubled since January, while the cost of dairy products, soya beans, wheat and sugar have also surged in recent months.

NPR: Summit on Food Crisis Scrutinizes Causes, Solutions

Even when firms such as Unilever manage to find a source of, say, non-modified soya to put in their products, it tends to get contaminated with genetically modified stuff since there is so much of it about.

ECONOMIST: Sticky labels

It all depends on whether products like sugar, soya and cotton are included on the list.

ECONOMIST: A small step on the road to Canc��n

Chinese food expert and chef Fuchsia Dunlop says historically dairy products were not part of the diet because soya and tofu have provided much of the same nutrition.

BBC: UK food delegation on China dairy trade promotion