So while in the process of moving I finally came across the bottle of Mag-10 that disappeared from me a long time ago! Yeah, after I spent hours looking for it a couple years ago, it finally shows up. It was part of my pre-order batch before it came out and has been at room temp. ever since. It's lot #560 best by 12/04. Question is, before I drop a lot of money on extra groceries for this cycle, should it still be fairly effective?