Does Ovaltine go bad?!
I bought Ovaltine (hot chocolate powder) when I started college because I used to ALWAYS drink it... that was like 3 or 4 years ago? I still have it, it looks fine and I don't see any expiration date... but I am not sure it's a good idea to drink it lol
Answers:
It won't hurt you. From a micro standpoint it is perfectly safe. Obviously, there will be come chemical changes even in a dry powder, but if it smells ok, it won't hurt you. Some powders that contain even small amount of fat will go rancid but I'm not sure how much fat Ovaltine contains if any.
PhD Food Chemistry and Nutrition