I have some 50% extract Cissus Nutracaps that have been in my cabinet for about a year. The material inside the caps has shrunk and it looks like a black pellet inside the cap. Do you think they are still good?
Sounds like they oxidized or got moisture in. Properly stored they should be good for 2 year. Try it for one day, and if you notice queasiness then they may have gone bad, but I think you should be fine.