Magnesium for perimenopause

Not all magnesium is the same. One form helps sleep. The other makes you run to the bathroom. Here's which is which.

4 minute read

Some links on this page are affiliate links. If you buy something, we may earn a commission — at no cost to you. We only link to things we'd recommend to a friend.

Here's the plain-English version. If you walked into a drugstore and grabbed the first magnesium bottle you saw, there's a 50/50 chance it was the wrong kind for what you're trying to do. Magnesium comes in at least ten different forms, and they do different things.

Glycinate: the one you want

Magnesium glycinate (sometimes called "bisglycinate") is the form that crosses into the nervous system and supports calm and sleep. It's gentle on the stomach. It doesn't cause the bathroom problem. For perimenopause sleep and anxiety, this is the form.

Citrate: useful but not for this

Magnesium citrate is a real laxative. Your doctor may prescribe it for constipation. If you take it at bedtime hoping to sleep, you will not sleep. Avoid for this purpose.

Other forms you'll see

• Oxide: Cheapest, poorest absorption. Skip.
• Threonate: Marketed for brain effects. Expensive. Real evidence is thin.
• Malate: OK for daytime energy and muscle. Not the first pick for sleep.

How much and when

Start with 300mg magnesium glycinate, about 60 minutes before bed. If nothing happens after a week, try 400mg. Don't go above 400mg from supplements unless a doctor tells you to.

What magnesium won't do

It's not a sleeping pill and it's not HRT. If your sleep is wrecked by night sweats or 3am cortisol surges, magnesium alone won't fix it. It's a helper, not a treatment. Read progesterone for sleep if magnesium isn't enough.