What is the worse that can happen if take 10 month old protien ?

So I was injured for for about a year. I'm finally feelin a like my injury is improving. Anyhow a while back I bought protein and creatin. They are 8 months expired. The vacuum seal was never opened , heck they still have the security seal on them. I also stored them in a cool place. So my question is whats the worse that can happen? Has the protein started to break down? Will I get the runs? Can I get really sick? Or maybe it's still good?