This is THE ONLY Brand to buy
This is the ONLY magnesium I've been able to tolerate!  (no IBS-D symptoms)  I did start slowly as suggested and now up to 1/2 tsp per day.  I will warn you, mixed with water it is very bitter but the benefits far outweigh that small downside.  I have no more leg cramps, and I feel it has also helped with my heart palpitations. My sleep is improving as well. I highly recommend this brand of magnesium.
Rating: 5 stars