A more accurate measure of magnesium can be obtained via red blood cells which contain 2 – 3x more Mg than serum. Mg is a mineral necessary for energy production, muscle contraction, nerve function, maintenance of strong bones, carbohydrate and protein metabolism, and over 300 enzymatic processes in the body. It is obtained through diet and is absorbed in the small intestine and colon. Levels may indicate deficiency due to malabsorption or gastrointestinal disorders.

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