Magnesium plays a role in hundreds of processes in your body, from supporting energy production and muscle function to maintaining strong bones and healthy nerves. Yet, this essential mineral is easy to overlook in your daily diet.
For women, getting enough magnesium is important at every stage of life, from the reproductive years to menopause. Researchers have also explored its potential role in menstrual discomfort, migraines, sleep, and other health concerns, although the evidence varies.
So, how much magnesium do women need, which benefits are backed by research, and what foods can help meet daily requirements? Let’s take a closer look.
1. Supports Healthy Bones
Bone health becomes increasingly important as women age, especially during and after menopause. As estrogen levels decline, bone loss accelerates, raising the risk of osteoporosis.
Magnesium plays an important role in bone formation and helps regulate calcium and vitamin D, which are essential for maintaining strong bones. In fact, much of the body’s magnesium is stored in the bones, where it contributes to their structure.
An observational study on 73,684 postmenopausal women found that those with higher magnesium intake had 2–3% higher bone mineral density. However, higher intake did not reduce the risk of hip or overall fractures.
Researchers also observed more wrist fractures among women with higher magnesium intake, possibly linked to greater physical activity and an increased risk of falls.
Although magnesium supports bone health, more research is needed to determine whether supplementation can reduce fracture risk.
2. May Provide Relieve from Menstrual Discomfort
Menstrual cramps, bloating, fatigue, and mood changes can make the days around your period challenging. Magnesium has attracted interest for its potential role in menstrual comfort because it supports normal muscle and nerve function.
A study of 60 college students found that magnesium supplementation may help reduce menstrual symptoms, although larger studies are needed to confirm the findings.
However, the evidence for premenstrual syndrome (PMS) is less encouraging. A 2024 review found insufficient evidence that magnesium improves psychological PMS symptoms, such as mood changes and irritability. Most studies had limitations, so better-quality research is needed.
Learn more: 15 Foods that may help relieve period pain
3. Supports Muscle Function and May Reduce Cramps Caused by Deficiency
Magnesium works alongside calcium and potassium to support muscle contractions and nerve signaling, helping your muscles function properly.
Low magnesium levels can cause cramps, twitching, and spasms, although dehydration, exercise, and certain medications can also trigger muscle cramps.
Research in pregnant women offers some insight into magnesium’s potential benefits. A Cochrane review examined eight studies involving 576 pregnant women and found that magnesium supplements may reduce leg cramps in some women, but results were inconsistent and the evidence was low or very low quality.
A later meta-analysis of four trials involving 332 pregnant women found no significant reduction in cramp frequency with magnesium supplementation.
Magnesium supplements may help if your intake is low, but they are not a reliable solution for muscle cramps.
4. Helps the Body Produce Energy
Persistent tiredness can have many causes, including poor sleep, stress, inadequate calorie intake, and iron deficiency. Magnesium is one nutrient that helps your body produce and use energy.
Your cells need magnesium to carry out reactions involving adenosine triphosphate (ATP), the molecule that supplies energy for cellular activities.
A study of 139 healthy older women found that taking magnesium daily for 12 weeks improved walking speed and chair-stand performance, especially among women with lower dietary magnesium intake. However, the study did not directly measure fatigue or energy levels.
Also read: 16 Foods that may boost energy levels
5. Helps Maintain Normal Heart Rythm
Magnesium helps maintain a normal heart rhythm, supports muscle function, and contributes to blood pressure regulation.
In the Nurses’ Health Study, which followed more than 86,000 women, higher dietary magnesium intake was associated with a lower risk of fatal coronary heart disease—but not a lower risk of coronary heart disease overall.
Because this was an observational study, it cannot prove that magnesium itself reduced the risk.
6. May Help Reduce the Frequency of Migraines
Migraines are more common in women than men, and hormonal changes can trigger attacks around menstruation. Magnesium has been studied as a potential option for migraine prevention.
A 2021 study analyzing data from 10,798 US adults showed that women with the highest dietary magnesium intake had 38% lower odds of reporting severe headaches or migraines than those with the lowest intake.
In a smaller, older study involving 20 women with menstrual migraines, magnesium supplementation reduced headache days and improved premenstrual symptoms. However, larger studies are needed to confirm these findings.
7. May Boost Mental Well-Being
Magnesium helps regulate nerve signaling and supports normal brain function. Researchers have investigated whether magnesium intake may also be linked to mood and psychological well-being.
Some studies suggest that magnesium supplements may help reduce depressive symptoms.
A 2023 review of seven clinical trials found an overall reduction in depression scores, although the included studies were small and more high-quality research is needed.
8. May Help With Blood Sugar Regulation
Magnesium plays an important role in glucose metabolism and insulin function, helping your body regulate blood sugar.
Studies involving women have linked higher dietary magnesium intake with a lower risk of developing type 2 diabetes.
However, this does not prove that magnesium directly prevents diabetes. Research on magnesium supplements and blood sugar control has produced mixed results, so supplements should not replace prescribed diabetes treatment.
9. Can Magnesium Help With Menopausal Hot Flashes?
Hot flashes are a common menopause symptom that can disrupt sleep and daily comfort. Researchers have explored whether magnesium can help, but the results have been mixed.
In a small study of 25 breast cancer patients, four weeks of magnesium oxide reduced hot flash frequency by 41.4% and hot flash scores by 50.4%. More than half of the women experienced a greater than 50% reduction in their hot flash scores.
However, the study had no placebo group, so these promising findings needed further testing.
But would these benefits hold up in a larger study? A study involving 289 postmenopausal breast cancer survivors found no significant reduction in hot flash frequency or severity with 800 or 1,200 mg of magnesium oxide daily compared with a placebo.
Magnesium Needs During Pregnancy
Magnesium supports fetal growth and development and helps regulate muscle and nerve function during pregnancy.
The recommended daily intake increases to 350 mg for pregnant women aged 19–30 and 360 mg for those aged 31–50, compared with 310 mg and 320 mg, respectively, for nonpregnant women.
Although some studies suggest magnesium supplements may reduce the risk of complications such as preeclampsia or preterm birth, findings are mixed. There are currently no general recommendations for routine magnesium supplementation during pregnancy.
Pregnant women should consult a healthcare professional before taking supplements.
Best Magnesium-Rich Foods for Women
You can obtain magnesium from a variety of everyday foods. Plant-based options are particularly useful sources, and including a range of magnesium-rich foods in your diet can help you meet your daily needs. Some animal foods also provide magnesium.
Here are some good options to include in your meals:
- Pumpkin seeds
- Chia seeds
- Almonds
- Spinach
- Cashews
- Black beans
- Edamame
- Peanut butter
- Brown rice
- Plain yogurt
- Fatty fish
To improve your magnesium intake, add nuts or seeds to oatmeal, include beans or lentils in lunch, choose whole grains, and eat leafy green vegetables regularly. Eating a variety of these foods is generally more beneficial than relying on a single food or supplement.
Should Women Take Magnesium Supplements?
Most women should aim to meet their magnesium needs through a balanced diet. Supplements may help when dietary intake is inadequate or a healthcare professional identifies a need.
Magnesium supplements come in forms such as citrate, glycinate, and chloride. Magnesium citrate may help relieve constipation, while evidence that a particular form improves sleep is limited.
Before taking supplements, keep these points in mind:
- Check the dose: The U.S. upper limit for adults is 350 mg daily from supplements and medications, excluding magnesium from food.
- Watch for side effects: High doses may cause diarrhea, nausea, and abdominal cramps.
- Check medication interactions: Magnesium can affect the absorption of certain antibiotics and osteoporosis medications.
- Consider kidney health: Kidney disease can increase the risk of magnesium buildup.
Consult a healthcare professional before taking supplements if you have a medical condition, take medication, or are pregnant or breastfeeding., taking regular medication, or considering magnesium for a particular health condition, speak with a healthcare professional before starting supplementation.
Signs of Magnesium Deficiency
Early magnesium deficiency can be difficult to recognize because symptoms are often nonspecific. Possible signs include:
- Loss of appetite
- Fatigue and weakness
- Nausea or vomiting
- Muscle cramps or twitching
- Numbness or tingling
- Abnormal heart rhythms in severe cases
The risk may be higher in people with certain digestive disorders, poorly controlled diabetes, excessive alcohol use, or some medication use.
These symptoms can have many causes and do not necessarily indicate a magnesium deficiency. A healthcare professional can help determine whether further evaluation is needed.
The Bottom Line
Magnesium supports several aspects of women’s health, from bone strength and muscle function to energy production and heart health.
The best way to meet your needs is through a balanced diet rich in nuts, seeds, legumes, whole grains, and leafy greens. Supplements may help when needed, but they aren’t a solution for every health concern.
Consult a healthcare professional before starting a magnesium supplement to determine whether you need one and what dose is appropriate.