Hey fellas my old roomate left some Phosphagen (Creatine Monohydrate) in our kitchen from 2009. Its opened but nearly full (2.2 lbs) and it has a "best by date" of May 2009. On a tight budget and after buying an insane amount of groceries each week supps are last priority. Thoughts..
Unless it's been exposed to moisture (as in "solid brick of white") it should be fine.
+1 internets for the picture.