Hi Heather. I'm an IBS-C and am taking Magnesium Oxide. I think it does help me but I have bad gas when I take them, especially during the day. I used to take it morning and night, 500mg each and didn't give me gas too much. But I started to get C again and thought I should take magnesium throughout the day, in smaller dosage--250mg each, twice a day, an hour before lunch, and around 4pm, along with my fiber capsules, and that's when I started to get really bad gas. My question is, are there other kinds of magnesiums other than magnesium oxide that can help without the gas and bloating? Thanks a bunch.