Magnesium

Involved in hundreds of biochemical reactions in your body

Magnesium is found throughout your body. Every cell in your body contains this mineral and needs it to function. About 60% of the magnesium in your body occurs in bone, while the rest is in muscles, soft tissues, and fluids, including blood . One of its main roles is to act as a cofactor — a helper molecule — in the biochemical reactions continuously performed by enzymes. It’s involved in more than 600 reactions in your body, including :

Energy creation: converting food into energy

Protein formation: creating new proteins from amino acids

Gene maintenance: helping create and repair DNA and RNA

Muscle movements: aiding in muscle contraction and relaxation

Nervous system regulation: regulating neurotransmitters, which send messages throughout your brain and nervous system

Nonetheless, studies suggest that approximately 50% of U.S. adults get less than the recommended daily amount of magnesium.

May boost exercise performance

Magnesium helps move blood sugar into your muscles and dispose of lactate, which can build up during exercise and cause fatigue. Studies show magnesium supplements may be particularly beneficial for improving exercise performance in older adults and those with a deficiency in this nutrient.

May combat depression

Magnesium plays a critical role in brain function and mood; low levels are linked to an increased risk of depression. A 2020 review suggested that stress may deplete magnesium, increasing susceptibility to stress and depression. What’s more, supplementing with this mineral may help reduce symptoms of depression.

May support healthy blood sugar levels

Studies suggest that about 48% of people with type 2 diabetes have low blood levels of magnesium, which may impair the body’s ability to regulate blood sugar levels effectively. Additionally, research indicates that people who consume more magnesium have a lower risk of type 2 diabetes. According to one review, magnesium supplements help enhance insulin sensitivity, a key factor in blood sugar control.

May promote heart health

Magnesium plays an important role in keeping your heart healthy and strong. A 2021 review shows that magnesium supplements can help lower high blood pressure levels, which may be a risk factor for heart disease. Another review linked high magnesium intake to a lower risk of heart disease, stroke, and high blood pressure. What’s more, one review found that magnesium supplements improved multiple risk factors for heart disease, including triglyceride, LDL (bad) cholesterol, HDL (good) cholesterol, and systolic blood pressure levels, especially in people with a magnesium deficiency.

Boasts anti-inflammatory benefits

Low magnesium intake is linked to increased levels of inflammation, which plays a crucial role in aging and chronic disease. One review of 11 studies concluded that magnesium supplements decreased levels of C-reactive protein (CRP), a marker of inflammation, in people with chronic inflammation.

May help prevent migraine attacks

Migraine headaches can be painful and often cause nausea, vomiting, and sensitivity to light and noise. Some researchers believe that people with migraine are more likely than others to have a magnesium deficiency.

May improve PMS symptoms

Premenstrual syndrome (PMS) is one of the most common conditions in female-bodied people of childbearing age. It often causes symptoms such as water retention, abdominal cramps, tiredness, and irritability. Some research suggests that magnesium supplements help relieve PMS symptoms and other conditions such as menstrual cramps and migraine attacks. This may be because magnesium levels fluctuate throughout the menstrual cycle, worsening PMS symptoms in those with a deficiency. As such, supplements may help reduce the severity of symptoms, including menstrual migraine attacks.

May promote bone health

Magnesium is crucial for maintaining bone health and protecting against bone loss. In fact, 50–60% of your body’s magnesium is found in your bones. Some studies associate lower levels of this mineral with a higher risk of osteoporosis, which causes bones to become brittle and weak. A 3-year study in 358 people undergoing hemodialysis — a treatment to help remove waste and water from the blood — showed that those who consumed the least magnesium experienced three times more fractures than those with the highest intake. Moreover, one recent review of 12 studies linked high magnesium intake to increased bone mineral density in the hip and femoral neck, both areas susceptible to fracture.

May support better sleep

Magnesium supplements are often used as a natural remedy for sleep issues such as insomnia. This is because magnesium regulates several neurotransmitters involved in sleep, such as gamma aminobutyric acid. One review of older adults with insomnia found that magnesium supplements lowered the amount of time it took people to fall asleep by an average of 17 minutes. Another study in nearly 4,000 adults linked increased intake of this mineral to improved sleep quality and duration.

May help reduce anxiety symptoms

Some research suggests that magnesium helps treat and prevent anxiety. For example, one study of 3,172 Iranian adults associated increased magnesium intake with a lower risk of depression and anxiety. Similarly, a small 6-week study found that taking 248 mg of magnesium daily significantly reduced anxiety symptoms. Other research suggests that magnesium deficiency may increase your body’s susceptibility to stress, which may amplify symptoms of anxiety.

Safe and widely available. Magnesium is essential for many aspects of health. The recommended daily intake is 400–420 mg for males and 310–320 mg for females. You can get this mineral from both food and supplements.

Food sources

The following foods are rich in magnesium:

• Pumpkin seeds: 37% of the DV per ounce (28 grams)

• Chia seeds: 26% of the DV per ounce (28 grams)

• Spinach, boiled: 19% of the DV per 1/2 cup (90 grams)

• Almonds: 19% of the DV per ounce (28 grams)

• Cashews: 18% of the DV per ounce (28 grams)

• Black beans, cooked: 14% of the DV per 1/2 cup (86 grams)

• Edamame, cooked: 12% of the DV per 1/2 cup (78 grams)

• Peanut butter: 12% of the DV per 2 tablespoons (32 grams)

• Brown rice, cooked: 10% of the DV per 1/2 cup (100 grams)

• Salmon, cooked: 6% of the DV per 3 ounces (85 grams)

• Halibut, cooked: 6% of the DV per 3 ounces (85 grams)

• Avocado: 5% of the DV per 1/2 cup (75 grams)