We finely chop walnuts and put them on our breakfast cereal. Is it okay to keep them in a container and use as needed? Will they spoil if not refrigerated? Do we loose any of the nutrition by chopping them up?

A. Walnuts are rich in polyunsaturated fat, which, when exposed to heat, does oxidized quickly, so if you chop them up it is best to store in an airtight container in the refrigerator or freezer to ensure freshness. Chopping does not affect the nutritional value as long as they are stored properly