Chelated minerals do not need stomach acid to break them down and can be taken without stomach acids. To reduce stomach upset, it’s best to take magnesium glycinate supplements with food. On an empty stomach, diarrhea can be caused by magnesium supplements. Vitamin C is a must for the body to absorb iron more effectively. If you are taking medications, consult your healthcare specialist or pharmacist. If you don’t have Food Chelated Mineral Supplements such as Calcium Citrate and Magnesium Glycinate Chelett Minerals like Magnasi Citrat, try them with dinner or right before bed.