Magnesium is a mineral found in a wide range of foods. Common foods which contain small traces of magnesium are green vegetables like spinach, broccoli, and rocket. It is also present in small traces in nuts and whole grains. Foods that have heavy amounts of dietary fiber are also good sources of magnesium. Magnesium is an electrolyte that is essential for various functions in your body. Electrolytes are electrically charged minerals that play crucial roles in various processes of the body. Magnesium plays a role in the production of energy as well as a contraction in muscles, the smooth functioning of nerves, and the maintenance of healthy bones. Magnesium is mainly sourced from the diet. It is absorbed by the small intestine and colon in increments. After the mineral has been absorbed, reserves are stored in the cells, tissues, and bones. The body maintains optimal levels of the mineral in the body by regulating the amount of magnesium absorbed by keeping a check on how much is excreted or conserved in the kidney. However, it must be noted that only 1% of the total body magnesium is present at any given time in the blood. Therefore, it is difficult for doctors to get an accurate measurement of the total amount of magnesium present in the body from blood tests alone. While blood tests are quicker, urine test
results can be much more holistic. However, the blood test is still helpful in assessing the levels of magnesium in the body and arriving at a diagnosis.