Answer:

As explained in the Concerns and Cautions section of our Magnesium Supplements Review, the caffeine in coffee can cause a slight increase in magnesium excreted in the urine, but coffee provides more magnesium than is lost, so drinking coffee is not expected to cause magnesium depletion or deficiency.

Learn more about magnesium and our Top Pick among supplements in the Magnesium Supplements Review.

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