It is safe to take magnesium supplements unless you have kidney disease. If you consume excess magnesium it is simply not absorbed by the body. Here are some e

It is safe to take magnesium supplements unless you have kidney disease. If you consume excess magnesium it is simply not absorbed by the body. Here are some excerpts from the article you linked: "It is noteworthy that intestinal absorption is not directly proportional to magnesium intake but is dependent mainly on magnesium status. The lower the magnesium level, the more of this element is absorbed in the gut, thus relative magnesium absorption is high when intake is low and vice versa." "As the kidneys play a crucial role in magnesium homeostasis, in advanced chronic kidney disease, the compensatory mechanisms start to become inadequate and hypermagnesaemia may develop." "Acute and chronic oral magnesium supplementation has been described as well tolerated with a good safety profile."