Magnesium Deficiency (Hypomagnesemia)

Magnesium deficiency, also called hypomagnesemia, happens when your body does not have enough magnesium. Magnesium is a mineral that helps more than 300 chemical reactions in your body. It helps your muscles relax, keeps your heart beating steadily, and supports your nerves and immune system.

Your body stores most of its magnesium inside your cells and bones, not in your blood. This makes deficiency easy to miss with standard blood tests. Only about 1% of your total magnesium circulates in your blood. Many people have low magnesium levels without knowing it.

Low magnesium can affect your energy, sleep, mood, and long-term health. It often develops slowly over time due to poor diet, certain medications, or digestive problems. Catching and correcting magnesium deficiency early can help prevent serious health issues down the road.

• Muscle cramps, twitches, or spasms, especially in your legs at night
• Fatigue and low energy that does not improve with rest
• Weakness or difficulty with physical activity
• Irregular heartbeat or heart palpitations
• Numbness or tingling in your hands or feet
• Headaches or migraines that happen frequently
• Anxiety, irritability, or mood changes
• Difficulty sleeping or restless sleep
• Loss of appetite or nausea
• High blood pressure that is hard to manage

Many people with mild magnesium deficiency have no obvious symptoms at first. The signs often develop gradually and can be mistaken for other conditions. Severe deficiency can cause more serious problems like seizures or abnormal heart rhythms.

Magnesium deficiency often results from not getting enough magnesium in your diet. Processed foods contain very little magnesium compared to whole foods like leafy greens, nuts, and seeds. Certain health conditions can also prevent your body from absorbing magnesium properly. Digestive disorders like Crohn's disease, celiac disease, or chronic diarrhea reduce magnesium absorption. Kidney disease can cause your body to lose too much magnesium through urine.

Several medications increase your risk of deficiency. Proton pump inhibitors for acid reflux, diuretics for high blood pressure, and some antibiotics can all deplete magnesium. Type 2 diabetes often causes magnesium loss through urine. Older adults are at higher risk because absorption decreases with age. Heavy alcohol use depletes magnesium and interferes with absorption. Chronic stress also increases magnesium loss through your kidneys.

Diagnosing magnesium deficiency requires the right type of blood test. Standard serum magnesium tests often miss deficiency because they only measure magnesium in your blood. Most of your magnesium lives inside your cells, not in your bloodstream. A red blood cell magnesium test, or RBC magnesium, provides a much more accurate picture of your true magnesium status.

RBC magnesium testing measures the magnesium inside your red blood cells. This reflects your long-term tissue magnesium levels and catches deficiencies that serum tests miss. Rite Aid offers RBC magnesium testing as an add-on to our preventive health panel. You can get tested at over 2,000 Quest Diagnostics locations nationwide. Early detection helps you address deficiency before it causes serious health problems.

• Increase magnesium-rich foods like leafy greens, nuts, seeds, whole grains, beans, and avocados
• Consider magnesium supplements under medical guidance, typically 200 to 400 mg daily
• Choose magnesium glycinate or magnesium citrate for better absorption
• Reduce or eliminate alcohol, which depletes magnesium stores
• Manage stress through meditation, yoga, or other relaxation techniques
• Review your medications with your doctor to identify any that may deplete magnesium
• Address underlying digestive issues that may affect absorption
• Get adequate vitamin D, which helps your body use magnesium properly
• Stay hydrated, but avoid excessive caffeine which increases magnesium loss
• Work with a doctor to monitor your levels and adjust treatment as needed