Perimenopause and Sleep

You Can't Supplement Your Way Out of a Wired Nervous System

If you've been lying awake at 2 - 3am lately, mind racing, body tired but somehow on — you're not imagining it, and you're definitely not alone.

Sleep is one of the first things to go sideways in perimenopause, and it's also one of the most frustrating, because the usual advice often doesn't touch the real problem. So let's talk about what's actually going on, and what genuinely helps.

It's not just "getting older"

Somewhere around your 40s, oestrogen stops its regular cyclic rhythm typical of your previous menstruating years and starts doing something more like a rollercoaster — dipping and spiking eratically. Progesterone, meanwhile, tends to decline earlier and more steadily. It's this gap between the two — not just low hormones on their own, that's often behind many perimenopause symptoms - the sleep disruption, the night sweats, the waking-up-and-can't-get-back-to-sleep nights.

Progesterone in particular has a calming effect on your nervous system. So when it starts dropping ahead of oestrogen, your body genuinely has less of its natural "off switch" available to it — which is a big part of why sleep can start feeling harder to come by, even when nothing else in your life has changed.

The stress piece nobody mentions

Here's something that surprises a lot of women: your body makes stress hormones and sex hormones from the same raw materials. Under chronic stress, your body will prioritise producing cortisol — because from a survival standpoint, stress hormones win every time. The trade-off is that there's less raw material left over for progesterone, your calming hormone.

Which means a wired, can't-switch-off nervous system and disrupted sleep aren't separate issues in perimenopause, they're often feeding each other.

So what actually helps?

A wind-down routine matters more than any single "hack." This isn't about a perfect 10-step evening ritual — it's about giving your nervous system consistent cues that it's safe to relax for the night. Think: dimming lights, screens off earlier, the same few things in the same order each night.

Down-regulation practices work with your biology, not against it. Breathwork, meditation, prayer, journalling, sleep music or stories (plenty of apps available), reading, essential oils — these all help shift you out of "on" mode.

Magnesium can support both sleep quality and a calmer nervous system. It's not a magic fix, but for a lot of women it's a genuinely useful piece of the puzzle — supporting the kind of calm that makes falling and staying asleep easier.

The bottom line

You can't supplement your way out of a wired nervous system — but you also don't have to just white-knuckle it through years of broken sleep, telling yourself this is just what your 40s and 50’s look like now.

Sleep struggles in perimenopause usually have a driver — whether that's hormonal, nervous-system load, or something else entirely — and once you know what yours is, the path forward gets a lot clearer.

If this sounds familiar and you'd like some support figuring out what's actually driving your sleep (and energy, and mood) in this season, I'd love to help.