I only worry about what I see, smell, and even taste in front of me, not about the dates too much.
I've see pharmaceuticals (not Anabolics) that were 25 years out of date, and we're at least as strong as when they were manufactured.
But then I've seen others that were still in date, but exposed to moisture/heat, and turned into some form of poison.
I always look at, and smell everything before I use it, but especially if something is older, because it has had more if an opportunity to be exposed to things it shouldn't.