Hi Ray, I read in a post somewhere that primeagra had gone through a phase where it had more minerals in it, and there was "old" and "new" primeagra, and the "new" stuff was quite dubious.
I can't recall exactly where I came across it (and I vaguely recall that it may have been you talking about this), and it may well have been a case of thread necromancy and the quality issue may now be moot?