Magnesium: which form matters, and which doesn't
If there is a "starter" mineral for women's hormonal support, it is magnesium. It is involved in over 300 enzymatic reactions, including the ones that regulate muscle relaxation, mood, blood sugar, and sleep.
Most modern diets supply less than the recommended daily intake. Most women, when measured properly, run mildly low.
But "take magnesium" is too vague to act on, because the form matters more than the dose. Here is the version most dietitians and clinicians agree on.
Forms that actually absorb
Magnesium glycinate. The form Dr. Aviva Romm, MD, and most integrative practitioners reach for first. Highly absorbed. Gentle on the stomach. Calming. Often taken in the evening for sleep support. Good for women navigating mood and cycle-related tension.
Magnesium citrate. Also well absorbed. Has a mild laxative effect in some women — which is helpful if constipation is part of the picture, less helpful if not. Often used at the same time as the body is generally low.
Magnesium L-threonate. A newer form with research suggesting it crosses the blood-brain barrier more readily than other forms, which has made it interesting for cognitive and mood-related uses. More expensive. Used at lower doses.
Magnesium malate. Sometimes used for energy and fibromyalgia-pattern fatigue. Less commonly reached for in women's hormonal support specifically.
Forms to skip
Magnesium oxide. By far the most common form in cheap supplements, and by far the worst absorbed. Roughly 4% bioavailable, by the better estimates. It is essentially a laxative in supplement form.
If you have a magnesium bottle in your cabinet and the label says oxide, that's probably why you're not feeling much.
What magnesium is good for in women
Melissa Groves Azzaro, RDN — The Hormone Dietitian — has written that magnesium is one of the few nutrients with consistent evidence for supporting women's premenstrual experience. Dr. Lara Briden has written the same. The mechanism: magnesium supports calm muscle tone, neurotransmitter balance, and the body's stress response — all systems that get tested in the late luteal phase.
Dr. Stacy Sims has written that magnesium also supports recovery from exercise, which most women in their thirties and forties don't get enough of given how active modern life is.
Doses
The general recommendation across these practitioners is 200–400 mg per day of an absorbable form. Higher doses are sometimes recommended in specific clinical contexts; ask your practitioner if you're not sure.
Most women feel a difference within two to three weeks of consistent use — not dramatic, but a quieter background. Better sleep, less calf cramping, less luteal-week irritability.
How Revhora uses it
Hormonal Balance AM and Menopause Support PM both include magnesium in forms selected for absorption and tolerance — not magnesium oxide. The AM ritual uses the form that complements morning physiology; the PM ritual uses the form most associated with evening calm and sleep support.
Like all minerals, magnesium is most useful as a consistent daily input over weeks. Not as a single big dose.
Sources & further reading
- Dr. Aviva Romm, MD. Clinical framing of magnesium forms in women's health. avivaromm.com
- Melissa Groves Azzaro, RDN — The Hormone Dietitian. Magnesium for premenstrual and cycle support. thehormonedietitian.com
- Dr. Lara Briden. Period Repair Manual on magnesium and PMS. larabriden.com
- Dr. Stacy Sims. Magnesium and women's recovery physiology. drstacysims.com
This article is for informational purposes only and does not constitute medical advice. Revhora products are designed to support — not treat, cure, or prevent — and consistent results take time. If you're experiencing symptoms that concern you, please consult a qualified healthcare provider.