Magnesium is the fourth most abundant mineral in the human body.
It plays several important roles in the health of your body and brain.
However, you may not be getting enough of it, even if you eat a healthy diet.
Here are 10 evidence-based health benefits of magnesium.
Magnesium is a mineral found in the earth, sea, plants, animals and humans.
About 60% of the magnesium in your body is found in bone, while the rest is in muscles, soft tissues and fluids, including blood (1Trusted Source).
In fact, every cell in your body contains it and needs it to function.
One of magnesium’s main roles is acting as a cofactor or helper molecule in the biochemical reactions continuously performed by enzymes.
In fact, it’s involved in more than 600 reactions in your body, including (2Trusted Source):
- Energy creation: Helps convert food into energy.
- Protein formation: Helps create new proteins from amino acids.
- Gene maintenance: Helps create and repair DNA and RNA.
- Muscle movements: Is part of the contraction and relaxation of muscles.
- Nervous system regulation: Helps regulate neurotransmitters, which send messages throughout your brain and nervous system.
SUMMARYMagnesium is a mineral that supports hundreds of chemical reactions in your body. However, many people get less than they need.
Magnesium also plays a role in exercise performance.
Magnesium helps move blood sugar into your muscles and dispose of lactate, which can build up during exercise and cause fatigue (5Trusted Source).
In one study, volleyball players who took 250 mg of magnesium per day experienced improvements in jumping and arm movements (9Trusted Source).
In another study, athletes who supplemented with magnesium for four weeks had faster running, cycling and swimming times during a triathlon. They also experienced reductions in insulin and stress hormone levels (10Trusted Source).
SUMMARYMagnesium supplements have been shown to enhance exercise performance in several studies, but research results are mixed.
One analysis in over 8,800 people found that people under the age of 65 with the lowest magnesium intake had a 22% greater risk of depression (14Trusted Source).
However, others emphasize the need for more research in this area (16Trusted Source).
In a randomized controlled trial in depressed older adults, 450 mg of magnesium daily improved mood as effectively as an antidepressant drug (17Trusted Source).
SUMMARYThere may be a link between depression and magnesium deficiency. Supplementing with it can reduce symptoms of depression in some people.
Magnesium also benefits people with type 2 diabetes.
Studies suggest that about 48% of people with type 2 diabetes have low levels of magnesium in their blood. This can impair insulin’s ability to keep blood sugar levels under control (1Trusted Source, 18Trusted Source).
One study which followed more than 4,000 people for 20 years found that those with the highest magnesium intake were 47% less likely to develop diabetes (21Trusted Source).
Another study showed that people with type 2 diabetes taking high doses of magnesium each day experienced significant improvements in blood sugar and hemoglobin A1c levels, compared to a control group (22Trusted Source).
However, these effects may depend on how much magnesium you’re getting from food. In a different study, supplements did not improve blood sugar or insulin levels in people who weren’t deficient (23Trusted Source).
SUMMARYPeople who get the most magnesium have a lower risk of type 2 diabetes. Moreover, supplements have been shown to lower blood sugar in some people.
In one study, people who took 450 mg per day experienced a significant decrease in systolic and diastolic blood pressure (27Trusted Source).
However, these benefits may only occur in people who have high blood pressure.
Another study found that magnesium lowered blood pressure in people with high blood pressure but had no effect on those with normal levels (28Trusted Source).
SUMMARYMagnesium helps lower blood pressure in people with elevated levels but does not seem to have the same effect in those with normal levels.
In one study, children with the lowest blood magnesium levels were found to have the highest levels of the inflammatory marker CRP.
In the same way, high-magnesium foods — such as fatty fish and dark chocolate — can reduce inflammation.
SUMMARYMagnesium has been shown to help fight inflammation. It reduces the inflammatory marker CRP and provides several other benefits.
Migraine headaches are painful and debilitating. Nausea, vomiting and sensitivity to light and noise often occur.
Some researchers believe that people who suffer from migraines are more likely than others to be magnesium deficient (36Trusted Source).
In one study, supplementing with 1 gram of magnesium provided relief from an acute migraine attack more quickly and effectively than a common medication (39Trusted Source).
SUMMARYPeople with frequent migraines may have low magnesium levels. Some studies show that supplementing with this mineral can provide relief from migraines.
Insulin resistance is one of the leading causes of metabolic syndrome and type 2 diabetes.
It’s characterized by an impaired ability of muscle and liver cells to properly absorb sugar from your bloodstream.
Magnesium plays a crucial role in this process, and many people with metabolic syndrome are deficient (3Trusted Source).
In addition, the high levels of insulin that accompany insulin resistance lead to the loss of magnesium through urine, further reducing your body’s levels (41Trusted Source).
One study found that supplementing with this mineral reduced insulin resistance and blood sugar levels, even in people with normal blood levels (45Trusted Source).
SUMMARYMagnesium supplements may improve insulin resistance in people with metabolic syndrome and type 2 diabetes.
Premenstrual syndrome (PMS) is one of the most common disorders among women of childbearing age.
Its symptoms include water retention, abdominal cramps, tiredness and irritability.
SUMMARYMagnesium supplements have been shown to improve symptoms that occur in women with PMS.
You can get it from both food and supplements.
The following foods are good to excellent sources of magnesium (49):
- Pumpkin seeds: 46% of the RDI in a quarter cup (16 grams)
- Spinach, boiled: 39% of the RDI in a cup (180 grams)
- Swiss chard, boiled: 38% of the RDI in a cup (175 grams)
- Dark chocolate (70–85% cocoa): 33% of the RDI in 3.5 ounces (100 grams)
- Black beans: 30% of the RDI in a cup (172 grams)
- Quinoa, cooked: 33% of the RDI the in a cup (185 grams)
- Halibut: 27% of the RDI in 3.5 ounces (100 grams)
- Almonds: 25% of the RDI in a quarter cup (24 grams)
- Cashews: 25% of the RDI in a quarter cup (30 grams)
- Mackerel: 19% of the RDI in 3.5 ounces (100 grams)
- Avocado: 15% of the RDI in one medium avocado (200 grams)
- Salmon: 9% of the RDI in 3.5 ounces (100 grams)
If you have a medical condition, check with your doctor before taking magnesium supplements.
Though these are generally well-tolerated, they may not be safe for people who take certain diuretics, heart medications or antibiotics.
Supplement forms that are absorbed well include magnesium citrate, glycinate, orotate and carbonate.
SUMMARYGetting enough magnesium is vital. Many foods contain it, and many high-quality supplements are available.
Getting enough magnesium is essential for maintaining good health.
Be sure to eat plenty of magnesium-rich foods or take a supplement if you’re unable to get enough from your diet alone.
Without enough of this important mineral, your body can’t function optimally.
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