From the tongue and salivary glands to the excretory organs, this complex system of digestion, filtration and excretion is critical to the necessary absorption of the vast majority of fluids, vitamins, nutrients, and minerals required for every bodily process. Some of the organs in this system include the stomach, intestinal tract (such as the large and small intestines, spleen, gallbladder, appendix, and rectum), as well as the liver, kidneys, and urinary tract.
Magnesium has been attributed in both modern and eclectic medicinal practices to be effective laxative and mild antacid treatments. Daily recommendations for dietary intake of magnesium from food vary widely, but an approximate 365-425 mg/day dietary intake is recommended. However, due to magnesium’s hygroscopic and laxative nature, it is estimated that a relatively small percentage (reportedly 10-24%) of total ingested supplemental magnesium is absorbed through the bowel, depending on the form of magnesium supplemented, the method of delivery, and bioavailability of the applicable molecule. Magnesium that is not absorbed within the large and small intestines is excreted in fecal matter.
Despite the increasing popularity of oral magnesium supplementation, bowel sensitivity due to prolonged usage of any laxative substance has been reportedly indicated as a common side effect of oral magnesium in every form. Magnesium deficiency is typically treated in the medical field via intravenous application of magnesium, often in conjunction with various saline and mineral solutions, which bypasses the gut and utilizes the kidneys for filtration of excess magnesium and better retention of serum concentrations. A small percentage of total magnesium filtered through the kidneys is excreted through the urine.
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