Last checked September 2026 against 7 sources · Editorial policy
Magnesium for menopause
Magnesium doesn't reduce hot flashes: in a placebo-controlled trial of more than two hundred women, magnesium oxide worked no better than placebo and caused more diarrhea. Women over 30 need 320 mg a day, which most can get from leafy greens, nuts, seeds, beans and whole grains. MedlinePlus says magnesium supplements aren't currently advised for preventing disease. Supplements up to 400 mg a day are unlikely to cause harm.
Magnesium didn't beat placebo for hot flashes in a trial. How much you need (320 mg a day), food sources, glycinate vs citrate vs oxide, and supplement safety.
Magnesium for menopause: expectation vs reality
What people often expect
“Magnesium glycinate is the missing mineral that will fix my hot flashes and sleep”
What the evidence shows
The one large trial of magnesium for hot flashes found no benefit over placebo. There are no trials of magnesium glycinate for menopause in the sources we reviewed. Magnesium is essential, and true deficiency is uncommon, though older adults, people with type 2 diabetes and heavy drinkers are more likely to run low.
Magnesium for menopause: what it can and can't do
Does magnesium help hot flashes?
No, according to the best evidence. In the North Central Cancer Treatment Group trial N10C2, women took magnesium oxide or placebo; hot flash scores and frequencies were similar in every group, and magnesium caused more diarrhea. The researchers concluded the results don't support magnesium oxide for hot flashes.
Learn more →What magnesium does in the body
Magnesium is needed for more than 300 biochemical reactions. It helps maintain normal nerve and muscle function, supports the immune system, keeps the heartbeat steady, helps bones stay strong, helps adjust blood sugar and aids energy and protein production. Diets high in protein, calcium or vitamin D increase the need for magnesium.
How much magnesium do women need?
US guidelines set the RDA at 320 mg a day for women 31 and older. The UK figure is 270 mg a day for women aged 19 to 64. Good sources are dark leafy greens, nuts such as almonds and cashews, seeds, peas and beans, soy foods such as tofu, whole grains, bananas, avocados, dried apricots and milk.
Learn more →Magnesium for sleep in menopause
Magnesium is often marketed for sleep, but the sources we reviewed don't include trials showing it improves menopausal sleep. For insomnia, CBT has good evidence, and HRT can improve sleep disrupted by night sweats. Sleepiness is actually listed among the signs of magnesium shortage, not a benefit of taking more.
Learn more →Magnesium glycinate vs other forms
Supplements come as magnesium oxide, citrate, glycinate and other forms. The hot flash trial used magnesium oxide. We didn't find menopause trials comparing forms, so claims that glycinate works better for menopause aren't backed by the evidence we reviewed. Whatever the form, the NHS says 400 mg or less a day from supplements is unlikely to harm.
Signs of low magnesium
True deficiency is rare. Early signs include loss of appetite, nausea, vomiting, fatigue and weakness; moderate deficiency causes numbness, muscle cramps, personality changes and abnormal heart rhythms. It's more likely with alcohol misuse, gut conditions that affect absorption, older age and type 2 diabetes.
Too much magnesium
The body usually removes extra magnesium, so problems are uncommon except in people with reduced kidney function. Excess usually comes from supplements or magnesium-containing laxatives. High doses, more than 400 mg, can cause diarrhea in the short term, which matched the side effects seen in the hot flash trial.
Magnesium and bones after menopause
Magnesium helps keep bones strong and supports the parathyroid glands, which make hormones important for bone health. Milk provides magnesium and phosphorus, which help the body use calcium. For bone protection, focus on calcium, vitamin D, exercise and, when needed, osteoporosis treatment.
Learn more →Magnesium by the numbers
320 mg
400 mg
300+
0
US and UK intake targets differ slightly; the hot flash trial tested magnesium oxide only.
Magnesium supplements for menopause compared
Magnesium from food
Good for
Leafy greens, nuts, seeds, beans and whole grains cover most women's needs.Watch
Harder with a diet low in plants.Magnesium oxide
Good for
The form tested in the hot flash trial.Watch
No benefit for hot flashes; more diarrhea.Magnesium glycinate or citrate
Good for
Widely sold.Watch
No menopause trials in the sources we reviewed.Proven hot flash treatments
Learn more →Good for
HRT, CBT, SSRIs or SNRIs, gabapentin and fezolinetant have good evidence.Watch
Some need a prescription.
How to take magnesium safely
- Try food first; supplements aren't currently advised for preventing disease.
- Keep supplements at 400 mg a day or less.
- Avoid supplements if you have kidney disease unless your doctor advises them.
- Don't buy magnesium for hot flashes; it didn't work in a large trial.
When to ask a doctor about magnesium
Muscle cramps, numbness or an irregular heartbeat
See a doctor; these can have many causes, including low magnesium.
Kidney disease
Check with your doctor before taking magnesium supplements or laxatives.
Poor sleep for weeks
Ask about CBT for insomnia and treating night sweats.
More →Hot flashes affecting daily life
Ask about HRT or proven non-hormonal medicines.
Magnesium and menopause: questions women ask
Does magnesium help with hot flashes?
No. In a placebo-controlled trial of more than two hundred women, magnesium oxide didn't reduce hot flash scores or frequency, and it caused more diarrhea.
Is magnesium good for menopause?
Magnesium is essential for nerves, muscles, bones and blood sugar, so getting enough matters. But supplements haven't been shown to ease menopause symptoms, and most women can meet the 320 mg target from food.
What is the best magnesium for menopause?
There's no evidence that one form works best for menopause. The hot flash trial used magnesium oxide without benefit. If you need a supplement for a low intake, keep it at 400 mg or less a day.
Is magnesium glycinate good for menopause?
We didn't find menopause trials of magnesium glycinate. It's a form of magnesium supplement; the only large trial tested magnesium oxide and found no benefit for hot flashes.
Can magnesium cause hot flashes?
Hot flashes weren't reported as a side effect in the magnesium trial; diarrhea was more common. If hot flashes started with a new supplement, tell your doctor.
How much magnesium should a menopausal woman take?
The RDA for women 31 and older is 320 mg a day from all sources. From supplements, the NHS says 400 mg or less is unlikely to cause harm.
Does magnesium help menopause sleep?
The sources we reviewed don't show that it does. CBT for insomnia has good evidence, and treating night sweats often improves sleep.
Related →What foods are high in magnesium?
Dark leafy greens, nuts such as almonds and cashews, seeds, beans and peas, tofu and soy flour, whole grains like brown rice, bananas, avocados, dried apricots and milk.
Sources
- Park H, Qin R, Smith TJ, et al. North Central Cancer Treatment Group N10C2 (Alliance): a double-blind placebo-controlled study of magnesium supplements to reduce menopausal hot flashes. Menopause. 2015;22(6):627-32.
- MedlinePlus Medical Encyclopedia. Magnesium in diet.
- NHS. Vitamins and minerals: others (including magnesium).
- Ayers B, Smith M, Hellier J, et al. Effectiveness of group and self-help cognitive behavior therapy in reducing problematic menopausal hot flushes and night sweats (MENOS 2): a randomized controlled trial. Menopause. 2012;19(7):749-59.
- NHS. Insomnia.
- MedlinePlus Medical Encyclopedia. Calcium in diet.
- The North American Menopause Society. The 2023 nonhormone therapy position statement of The North American Menopause Society. Menopause. 2023;30(6):573-590.
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