What causes low magnesium in the body?

As a healthcare professional with a background in nutrition and physiology, I am often asked about the causes of nutrient deficiencies, including low magnesium levels in the body. Magnesium is an essential mineral that plays a crucial role in over 300 enzymatic reactions in the body, including nerve and muscle function, blood sugar control, and blood pressure regulation. Causes of low magnesium in the body can be multifactorial, including: 1. Poor dietary intake: A diet lacking in magnesium-rich foods such as whole grains, nuts, seeds, and green leafy vegetables can lead to deficiency. 2. Gastrointestinal malabsorption: Conditions like Crohn's disease, celiac disease, or other gastrointestinal disorders can impair the absorption of magnesium. 3. Chronic alcoholism: Excessive alcohol consumption can deplete magnesium levels due to poor dietary choices and impaired absorption. 4. Age: Older adults may have reduced magnesium absorption and increased excretion due to changes in their gastrointestinal function. 5. Diuretic use: Certain medications, particularly diuretics, can increase the excretion of magnesium in urine. 6. Diabetes: High blood sugar levels can cause increased urinary excretion of magnesium. 7. Chronic kidney disease: The kidneys play a role in regulating magnesium levels, and kidney dysfunction can lead to low magnesium levels. 8. Dehydration: Loss of fluids can lead to a decrease in magnesium levels, especially if there is also a loss of electrolytes. 9. Certain medications: Besides diuretics, other medications like antibiotics and some heart or cancer drugs can affect magnesium levels. It's important to note that not all cases of low magnesium are due to dietary deficiency. Medical conditions and medications can also play a significant role. If you suspect you have low magnesium, it's crucial to consult with a healthcare provider for a proper diagnosis and treatment plan.

Medications That Can Cause Magnesium Deficiency. Among the known magnesium deficiency causes are prescription medications such as diuretics, antibiotics, painkillers and cortisone, which can deplete magnesium levels in the body by impairing absorption or by increasing excretion by the kidneys.