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Magnesium is one of seven essential macrominerals. These macrominerals are minerals that people need to consume in relatively large amounts — at least 100 milligrams (mg) per day.
An adult body contains around 25 gram (g) of magnesium, 50–60% of which the skeletal system stores. The rest is present in muscle, soft tissues, and bodily fluids.
Almonds, spinach, and cashew nuts are some of the foods highest in magnesium. If a person cannot get enough magnesium through their diet, their doctor may recommend taking supplements.
Magnesium is a mineral that helps:
- turn the food we eat into energy
- make sure the parathyroid glands, which produce hormones important for bone health, work normally
Good sources of magnesium
Magnesium is found in a wide variety of foods, including:
- wholemeal bread
How much magnesium do I need?
The amount of magnesium you need is:
300mg a day for men (19 to 64 years)
270mg a day for women (19 to 64 years)
1. Bone health
While most research has focused on the role of calcium in bone health, magnesium is also essential for healthy bone formation.
Research from 2013 has linked adequate magnesium intake with higher bone density, improved bone crystal formation, and a lower risk of osteoporosis in females after menopause.
Magnesium may improve bone health both directly and indirectly, as it helps to regulate calcium and vitamin D levels, which are two other nutrients vital for bone health.
Research has linked high magnesium diets with a lower risk of type 2 diabetes. This may be because magnesium plays an important
role in glucose control and insulin metabolism.
A 2015 review in the World Journal of Diabetes reports that most, but not all, people with diabetes have low magnesium and that magnesium may play a role in diabetes management.
A magnesium deficiency may worsen insulin resistance, which is a condition that often develops before type 2 diabetes. On the other hand, insulin resistance may cause low magnesium levels.
In many studies, researchers have linked high magnesium diets with diabetes. In addition, a systematic review from 2017 suggests that taking magnesium supplements can also improve insulin sensitivity in people with low magnesium levels.
However, researchers need to gather more evidence before doctors can routinely use magnesium for glycemic control in people with diabetes.
3. Cardiovascular health
The body needs magnesium to maintain the health of muscles, including the heart. Research has found that magnesium plays an important role in heart health.
A 2018 review reports that magnesium deficiency can increase a person’s risk of cardiovascular problems. This is partly due to its roles on a cellular level. The authors observe that magnesium deficiency is common in people with congestive heart failure and can worsen their clinical outcomes.
People who receive magnesium soon after a heart attack have a lower risk of mortality. Doctors sometimes use magnesium during treatment for congestive heart failure (CHF) to reduce the risk of arrhythmia, or abnormal heart rhythm.
According to a 2019 meta-analysis, increasing magnesium intake may lower a person’s risk of stroke. They report that for each 100 mg per day increase in magnesium, the risk of stroke reduced by 2%.
Some research also suggests that magnesium plays a role in hypertension. However, according to the Office of Dietary
Supplements (ODS), based on current research, taking magnesium supplements lowers blood pressure “to only a small extent.”
The ODS call for a “large, well-designed” investigation to understand the role of magnesium in heart health and the prevention of cardiovascular disease.
4. Migraine headaches
Magnesium therapy may help prevent or relieve headaches. This is because a magnesium deficiency can affect neurotransmitters and restrict blood vessel constriction, which are factors doctors link to migraine.
People who experience migraines may have lower levels of magnesium in their blood and body tissues compared with others. Magnesium levels in a person’s brain may be low during a migraine.
A systematic review from 2017 states that magnesium therapy may be useful for preventing migraine. The authors suggest that taking 600 mg of magnesium citrate appears to be a safe and effective prevention strategy.
The American Migraine Foundation report that people frequently use doses of 400–500 mg per day for migraine prevention.
The amounts that may have an affect are likely to be high, and people should only use this therapy under the guidance of their doctor.
5. Premenstrual syndrome
Magnesium may also play a role in premenstrual syndrome (PMS).
Small-scale studies, including a 2012 article, suggest that taking magnesium supplements along with vitamin B-6 can improve PMS symptoms. However, a more recent 2019 reviewTrusted Source reports that the research is mixed, and further studies are needed.
The American College of Obstetricians and Gynecologists suggest that taking magnesium supplements could help to reduce bloating, mood symptoms, and breast tenderness in PMS.
Magnesium levels may play a role in mood disorders, including depression and anxiety.
According to a systematic review from 2017, low magnesium levels may have links with higher levels of anxiety. This is partly due to activity in the hypothalamic-pituitary-adrenal (HPA) axis, which is a set of three glands that control a person’s reaction to stress.
However, the review points out that the quality of evidence is poor, and that researchers need to do high quality studies to find out how well magnesium supplements might work for reducing anxiety.
minerals also help your body function. Minerals are elements that our bodies need to function that can be found on the earth and in foods. Some minerals, like iodine and fluoride, are only needed in very small quantities. Others, such as calcium, magnesium, and potassium, are needed in larger
amounts (macrominerals). Microminerals, such as iron and zinc, are just as important, though people need them in smaller amounts.
As with vitamins, if you eat a varied diet, you will probably get enough of most minerals.