the former designates the objective of the unhealthy food; the latter is investigating

the outcome of the unhealthy food

the former disputes the nutritiousness of food for public; the latter further

elaborates why it is so

the former defines the food that people eat; the latter is figuring out the best solution

to food problems

the former describes the cause of many illnesses which is related to unhealthy diet:

the latter specifies the fondness of people to add additives to meat