Magnesium deficiency

Inadequate Dietary Intake

This is one of the primary causes of magnesium deficiency and may be due to:

• Starvation
• Dieting or selective eating
• Difficulty swallowing
• Mental health issues
• End-stage cancer
• Critically ill patients on total intravenous (IV) nutrition

Age

As people age, the body’s ability to absorb magnesium from the digestive tract decreases. Older individuals are also more likely to have chronic conditions that deplete magnesium levels.

Gastrointestinal Disorders

Poor absorption of magnesium can occur in conditions such as:

• Celiac disease
• Inflammatory bowel disease
• Gastric bypass surgery
• Crohn’s disease
• Chronic diarrhea
• Pancreatitis

Excessive Fluid Loss

Excessive sweating or frequent urination caused by kidney disorders can increase the risk of magnesium deficiency.

Type 2 Diabetes

People with type 2 diabetes are more prone to magnesium deficiency due to increased excretion of magnesium. The risk may increase by 13.5–47.7% in diabetic individuals.

Chronic Alcohol Use

Long-term alcohol consumption significantly increases the risk of magnesium deficiency. Around 30% of individuals with magnesium deficiency are chronic alcohol users.

Certain Medications

Magnesium deficiency is common among those taking medications such as:

• Loop and thiazide diuretics
• Proton pump inhibitors
• Aminoglycoside antibiotics
• Amphotericin
• Pentamidine
• Digitalis
• Chemotherapeutic drugs like cisplatin and cyclosporine

Genetic Disorders

Some rare genetic conditions are linked to magnesium deficiency, including:

• Gitelman syndrome
• Hypercalciuric hypomagnesemia
• EAST (SeSAME) syndrome

Burns

Large burns can lead to fluid loss through the affected areas of the body, increasing the risk of magnesium deficiency.

Quick Note

Hyperaldosteronism, a condition where the adrenal glands produce too much aldosterone, can also raise the risk of magnesium deficiency. The adrenal glands, located on top of the kidneys, help regulate salt and water balance in the body.

Magnesium deficiency is diagnosed based on a combination of clinical symptoms, medical history, physical examination, and laboratory tests:

Medical History and Physical Examination

The doctor will inquire about symptoms, your medical history, and lifestyle factors such as diet. A physical examination is also conducted to look for signs of magnesium deficiency. Specific signs that might be observed include:

• Chvostek sign: Twitching of the upper lip.
• Trousseau sign: A specific hand posture when the blood pressure cuff is inflated above systolic pressure for 3 minutes.

Laboratory Tests

Magnesium deficiency may result in lower levels of calcium and potassium. Essential blood tests include:

• Magnesium blood test
• Calcium blood test
• Potassium blood test
• Comprehensive metabolic panel (CMP)
• Urine magnesium test

Imaging Tests

Imaging tests are used to detect the impact of the deficiency:

• Electrocardiography: To check for irregular heart rhythms.
• Bone X-rays: To detect bone deformities.
• Renal Ultrasonography: To assess kidney function and abnormalities.

Genetic Testing

Genetic testing may be considered in cases of unexplained magnesium deficiency or if there is a family history of the condition.

Incorporate Magnesium-Rich Foods into Your Diet

The Recommended Dietary Allowance (RDA) for magnesium varies by age and gender. Below are the RDA values for different groups:

For children:

• 1-3 years: 80 mg/day
• 4-8 years: 130 mg/day
• 9-13 years: 240 mg/day

For adolescents and adults:

• Males 14-18 years: 410 mg/day
• Females 14-18 years: 360 mg/day
• Males 19-30 years: 400 mg/day
• Females 19-30 years: 310 mg/day
• Males >31 years: 420 mg/day
• Females >31 years: 320 mg/day

During pregnancy and lactation, the requirement is typically 350-360 mg/day.

Ensure your diet includes magnesium-rich foods such as:

• Spinach
• Legumes
• Whole grains
• Swiss chard
• Nuts (Brazil nuts, cashews, peanuts, almonds, hazelnuts)
• Seeds (pumpkin, sesame, chia)
• Avocado
• Milk
• Yogurt
• Bananas
• Dark chocolate

These sources are further detailed in the "Home Care" section.

Consider Magnesium Supplements

Magnesium supplements may be helpful for individuals with type 2 diabetes or low magnesium levels. For pregnant women who develop diabetes, magnesium supplementation can improve insulin sensitivity and lower blood sugar.

Limit Alcohol and Certain Medications

Excessive alcohol intake and long-term use of certain medications can impair magnesium absorption. Reducing alcohol consumption or discussing alternative medications with your doctor can help prevent deficiency.

Promote Gut Health

A healthy gut ensures better absorption of magnesium. Include fermented foods like:

• Yogurt
• Kefir
• Kombucha
• Sauerkraut

Limit Caffeinated and Carbonated Drinks

Caffeine can increase magnesium loss, and fizzy drinks with phosphoric acid may deplete magnesium levels. Limiting these beverages may reduce the risk of magnesium deficiency.

Specialists to Consult

If you suspect magnesium deficiency, the following specialists can help:

• General Physician: Can diagnose and treat magnesium deficiency with blood tests, dietary advice, and supplements.
• Gastroenterologist: Helps if deficiency arises from malabsorption.
• Nutritionist: Assists in assessing dietary habits and creating a magnesium-rich meal plan.
• Geneticist: Diagnoses genetic causes of magnesium deficiency (inherited forms).

The treatment approach depends on the severity of the deficiency and its underlying cause. Common treatment methods include:

Dietary Changes

Increasing magnesium-rich foods can address mild deficiencies.

Oral Magnesium Supplements

For moderate deficiency, oral supplements like tablets or capsules are often recommended. Types of magnesium supplements include:

• Magnesium citrate: Widely used and effective for constipation.
• Magnesium chloride: Available in both oral and topical forms, useful for muscle and joint health.
• Magnesium glycinate: Gentle on the stomach, often used for those who experience stomach discomfort with other types.
• Magnesium sulfate: Primarily used to treat seizures in pregnant women with high blood pressure and low magnesium levels.
• Magnesium lactate: Easily absorbed, especially beneficial for those with digestive issues.
• Magnesium malate: Well absorbed, associated with relief from muscle pain.
• Magnesium taurate: May help manage blood sugar and blood pressure.
• Magnesium oxide: Used for indigestion and constipation but not recommended for treating deficiency due to poor absorption.
• Magnesium L-threonate: Potentially beneficial for brain health, and may alleviate anxiety, muscle tension, and sleep issues.

Intravenous (IV) Magnesium

In severe cases, magnesium is administered through an IV, especially if the deficiency is life-threatening.

Did You Know?

Topical magnesium products, like oils and sprays, are available for muscle and joint health support, though their effectiveness in raising magnesium levels still requires further research.

Fatigue and Weakness

Low magnesium levels are often associated with fatigue, tiredness, and general weakness.

Muscle Cramps and Weakness

Magnesium deficiency can cause muscle cramps, weakness, and spasms.

Irregular Heartbeat

Inadequate magnesium levels can lead to arrhythmias, or irregular heart rhythms, as magnesium plays a key role in heart function.

Osteoporosis

Chronic magnesium deficiency may negatively impact bone health, potentially contributing to conditions like osteoporosis.

Mood Swings

Magnesium imbalances can cause mood disturbances, including anxiety, depression, and irritability.

To meet the recommended magnesium intake, it's best to include a variety of magnesium-rich foods in your diet, such as:

Nonfat or Low-Fat Greek Yogurt

Greek yogurt is an excellent source of magnesium. You can pair it with fiber-rich fruits for a quick, nutritious breakfast.

Soybeans

Soybeans are a magnesium-packed food that also provides fiber and essential vitamins. Snacking on half a cup of dry roasted soybeans can offer around 106 mg of magnesium and 20.2 g of protein.

Fatty Fish

Incorporating fatty fish like salmon and tuna into your meals can help you increase your magnesium intake.

Pumpkin Seeds

A single ounce of pumpkin seeds provides around 150 milligrams of magnesium. These seeds make for a healthy snack or can be added to salads and yogurt.

Spinach

One cup of cooked spinach contains roughly 157 milligrams of magnesium. It's a versatile ingredient for salads, omelets, and various other dishes.

Almonds

A quarter-cup of almonds provides approximately 97 milligrams of magnesium. They can be enjoyed as a snack or sprinkled over cereals and salads.

Avocado

A medium-sized avocado delivers about 58 milligrams of magnesium. You can enjoy it in salads, sandwiches, or as a standalone snack.

Dark Chocolate

Dark chocolate is an excellent source of magnesium. A 28g serving of dark chocolate can offer 65 mg of magnesium, along with fiber that supports magnesium production in the body.

Tofu

Tofu is a great protein source for vegetarians, and it is also rich in magnesium. A 100g serving provides 35 mg of magnesium.

Bananas

One large banana contains about 37 mg of magnesium, along with a variety of other nutrients. It is a popular and easy-to-eat fruit.

Managing magnesium deficiency involves careful monitoring of your health, diet, and any treatments prescribed by your healthcare provider:

Early Diagnosis

Consult a healthcare provider to confirm the deficiency and assess its severity. They may recommend further tests to determine the underlying cause.

Take Supplements as Prescribed

Your doctor may recommend oral or injectable magnesium supplements. Make sure to follow their prescribed dosage and frequency.

Monitor Your Diet

Keeping a food diary can help you track your magnesium intake and identify areas where you may be lacking. This can help you make necessary adjustments to your diet.

Regular Check-ups

Schedule routine check-ups to monitor your magnesium levels and overall health. Your doctor can advise on any adjustments needed in your treatment.

Watch for Symptoms

Be attentive to any signs or symptoms of magnesium deficiency, and report new or worsening symptoms to your doctor promptly.

Educate Yourself

Understanding magnesium deficiency, its causes, and management options empowers you to make informed decisions about your health and collaborate effectively with your healthcare provider.

Avoid Overdose

Taking too many magnesium supplements can lead to toxicity. The total intake, including both dietary and supplement sources, should not exceed the recommended levels.

Symptoms of Magnesium Toxicity

Magnesium toxicity can occur when serum concentrations exceed 1.74–2.61 mmol/L, leading to symptoms such as:

• Low blood pressure (hypotension)
• Nausea and vomiting
• Flushed skin
• Urinary retention
• Depression
• Lethargy
• Breathing difficulties
• Severe hypotension
• Irregular heartbeat
• Cardiac arrest

People with impaired kidney function are more susceptible to magnesium toxicity.