INQ is a simple and practical index to evaluate the nutritional quality of food, which is recommended in view of the recent nutritional problems of the American public.

That is, the ratio of nutrient density (the ratio of a nutrient contained in food to the supply) to thermal energy density (the ratio of thermal energy contained in food to the supply).

Formula: (content of a certain nutrient in a certain food/recommended intake RNI)/ amount of this nutrient)/(recommended intake of energy provided by a certain food is good)

INQ= 1 This kind of food has the same ability to provide nutrition as energy, and it is a "product with qualified nutritional quality".

INQ & gt； 1 The ability to provide nutrients is greater than the ability to provide energy. It is a kind of "food with qualified nutritional quality", especially suitable for overweight and obese people.

INQ< 1 The ability of food to provide nutrition is less than that of extract.