I like magnesium citrate, too. When you get some, consider at first taking the same milligrams you're taking now. Then start increasing it maybe a capsule a day, and hold for a few days, then increase another capsule. Get used to the feel of it so you don't blast past what you can tolerate and regret ever giving it a try :) Tolerance till diarrhea sets in can vary widely, from, say, 400 mg to 1200 mg. Good luck!