Creatine Go Bad?

I know this has to have been addressed before, but I cant seem to find a definitive answer.

I have a bottle of creatine-“Natures Best Perfect Creatine Monohydrate” that I bought last June, took a couple servings of, and forgot about. There is no experation date. It has been sitting in my closet ever since. Still good?

Should be fine if it was closed and in a dry place away from extremes in temp.