Mag. citrate is simply one of many magnesium based formulas that work by drawing fluid into the bowel to eliminate the excess magnesium that the body cannot absorb. Its an excellent laxative and small doses may help keep you regular. However, it is not good for the deep cleansing of the colon that most on this forum are seeking. It also does nothing to strengthen the peristaltic movement s or tone the muscles of the colon. Basically, all it does is clean you out.