Be careful with supplements. They are FULL of MSG ingredients. I had a four-month MSG headache because of a calcium supplement with maltodextrin. Having heard that a calcium deficiency caused headaches, I would take extra and make the headache worse & worse. It was a nightmare that messed up my life well beyond the miserable four months. Now I'm having the same trouble finding a magnesium supplement that doesn't give the same headache, though I don't know which of the ingredients is the problem.