You have to be careful here.  The fats are crafty this way for example they went with soda then changed it to Diet soda but now bam they left that space and are into juicing, sugar coffee and smoothies.  They like the appearance of eating "healthy" (of course they eat a 2500 calorie healthy snack 4 or 5 times a day at work but don't know why they cant lose weight) before getting home and killing the half gallon ice cream.  Point I am making you have to be one step ahead and not just stereotype to get rich of their food habits.  You need to find the next Jamba before they do.