The statement "For some, it's food for thought" refers to the idea that some people may find the information or subject being discussed to be thought-provoking and worth considering. It is saying that the information can be used as mental nourishment for those who are interested in it.
Involving in taking an action, is not clearly stated in the given statement. It might be in context of a conversation or a statement that is being made, but it is not explicitly stated in the sentence provided.
Uday Tahlan