I’ve been taking 400 mg of magnesium citrate daily for almost a week which is also about the same amount of time I’ve been learning about 180 health and trying to implement some of it. I’ve always been constipated so when things started to soften a bit and happen more this past week, I thought it was due to drinking less and eating more sugar/carbs but maybe due to the mag. citrate? Anyway, I haven’t gotten diarrhea, at least not yet. I take the mag. citrate with D3 and have read that taking calcium with it too may or may not be necessary – I’m somewhat leery of supplemental calcium so haven’t added it.