Magnesium citrate is the easiest to be absorbed by the body. How much magnesium are you taking? I'm getting around 700 mg a day. It is in the malic acid/magnesium supplement. So, I'm taking half of it in the morning and half in the evening.
I would start out with about 100 mg in the morning and 100 mg in the evening. Do this for several days. If you have no diarrhea, take 200 in the morning and evening. Wait and see what happens. Your body might need to get used to the magnesium again. If this goes fine and you want to take more, then keep upping the incriments in this manner. That's how I did it and I don't not have a problem with diarrhea. Hope this helps!
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