Advanced nutrients.... expiration dates???

Wanting to use leftovers from last season. I think all would be fine except the voodoo juice cuz that stuff had live bacteria in it.

Anyone got expertise in this area?

I just got a bottle of tarantula from DAN, discount advanced nutrients on 8/22/14, and it was dated 10/10/14. I called the manufacture, and they said it was ok. But the voodoo and piranha I got in the same order, were 12/10/15. Something doesn't pass the smell test to me.