Magnesium gives me diarrhea!?

Verily, I have ventured to partake of magnesium, enticed by its reputed powers to quicken the faculties of the mind. Yet, upon consuming this curious mineral, I am beset by an odd and most disquieting phenomenon. In due course, as time doth elapse, a torrent most unbidden and unrelenting doth issue forth from my bowels with an urgency heretofore unmatched in all my days. Pray, could it be that magnesium, in its mysterious workings, doth serve as an anal diuretic?