Nature Valley Sweet & Salty Nut Granola Bars

[elliot1]

Are we worried about the “natural flavor” containing animal products?
See answer below:

Non-Hechsher Kashrut

The question is very strong and important and the answer seems vague and possibly misleading. I’m doing some research since I mistakenly ate a Nature Valley chewy granola bar without supervision. OU said the ingredients are kosher but the equipment not (i.e they cook/prepare other products with non kosher ingredients). Assuming the worst case ( cooking /heating is used in the preparation of the product) how would that be permissible? (I’m obviously looking for a serious leniency) Thanks!