Is it okay to take magnesium citrate while breastfeeding?

Why do you want to take this. If it is used as a laxative, there are alternatives - You may take a fiber laxative like Metamucil and drink enough water daily so that your urine is colorless. For the long term you may try to increase your intake of fiber foods. for info: http://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/high-fiber-foods/art-20050948