Why your sleep feels broken, and it's not "just stress"
Hey friend,
We’ve made it to the final week of Month One, and what a foundation you’ve built. You’ve started tracking your cycle, your symptoms, and your food and mood. This week, let’s bring sleep into the picture, because for so many women, disrupted sleep is one of the very first signs that perimenopause has arrived.
If you’ve been waking at 3am for no clear reason, lying there wired and exhausted at the same time, or just generally feeling like your sleep “used to work” and now doesn’t, I want you to know there is real, well-documented biology behind this. It’s not just stress, and it’s not just aging.
Your brain’s sleep control center runs on estrogen
Here’s something genuinely fascinating: the part of your brain responsible for regulating your sleep-wake cycle , called the suprachiasmatic nucleus (SCN) , is rich in estrogen receptors. So is your body’s main thermoregulatory center. This isn’t a coincidence. Researchers describe estrogen as a master regulator that helps your brain respond at multiple timescales to keep things like temperature, sleep, and circadian rhythm coordinated. When estrogen starts fluctuating unpredictably in perimenopause, these tightly coordinated systems can fall out of sync , which is part of why sleep, temperature regulation, and mood often unravel together. PubMed Central
Progesterone matters too — and it’s complicated
Progesterone actually has a calming, sleep-promoting effect on the brain. It acts as a neuroactive steroid that, via its metabolites, has a potent sedative and hypnotic effect on the central nervous system. But ,and this is the kind of nuance I love sharing, progesterone can also raise core body temperature, and elevated body temperature itself disturbs sleep, creating a confusing push-pull effect where the hormone is sleep-promoting in one way and sleep-disrupting in another. ScienceDirect
Melatonin gets caught in the crossfire too
This part explains a lot: sex hormones help sensitize neurons to melatonin, so as estrogen levels decline, melatonin production tends to drop too , directly contributing to perimenopausal sleep disturbances. A comprehensive narrative review covering studies through 2024 confirmed that fluctuating estrogen and progesterone affect sleep quality, while hot flashes and night sweats disrupt sleep further and circadian changes, reduced melatonin, and mood shifts all compound the problem together. Importantly, this isn’t a rare experience, researchers note perimenopause symptoms broadly affect 80–90% of women, so if your sleep has changed, you are very much in good company. MDPI
Why this matters for you, practically
This isn’t just background science for its own sake, it’s permission. Permission to stop blaming yourself for “bad sleep hygiene” when the real driver might be hormonal. And it’s a reason to keep tracking: pair your sleep notes (quality, wake times, night sweats) with your cycle data from Week One. Many women notice their worst sleep clusters in a specific cycle window, that’s useful information for you and your provider.
A both/and note
Whether you and your provider eventually explore options like hormone therapy, or you lean toward natural sleep support, or a combination of both, understanding why your sleep has changed takes away so much of the self-blame. We’ll go deep on specific sleep strategies and supplements next month, so for now, just notice and track.
This week’s gentle action step: Add sleep quality, wake times, and any night sweats to your tracker. You’re building a complete picture now.
Your sleep isn’t broken. Your hormones are just renegotiating the terms and understanding that is the first step toward feeling like yourself again.
With you in this,
Chantal
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Your Sleep Support Toolkit: What to Try Tonight, What to Track, and What to Ask For
You now understand why your sleep has changed. This week’s paid section is short and practical, a toolkit you can actually use, organised by what you can do on your own, what you can add in, and when it’s time to ask for more help.
THE PROTOCOL
Your sleep environment — the non-negotiables first
Before supplements, before anything else, your sleep environment needs to work with your thermoregulation, because as we covered in the free section, estrogen and progesterone both affect your core body temperature. Hot flashes and night sweats are not just uncomfortable, they are physiological wake-up signals your brain cannot ignore.
Keep your bedroom between 16–18°C (60–65°F) — cooler than you might think. This is the temperature range most consistently associated with better sleep onset and fewer night wake-ups in menopausal women
Use layered, breathable bedding — bamboo or linen over synthetic. You want to be able to throw a layer off without fully waking
A cooling pillow or mattress topper is worth the investment if night sweats are frequent — this is not a luxury, it is a sleep intervention
Keep a small fan or open window on your side of the bed if your partner runs cold — your temperature needs and theirs may no longer match, and that is completely normal
The wind-down window — 90 minutes before bed
Your brain needs a signal that the day is ending. In perimenopause and postmenopause, when cortisol is already dysregulated, this transition matters more than it ever did before. The goal of the wind-down window is to lower cortisol and core body temperature simultaneously.
Dim all lights after 9pm — bright overhead lighting suppresses melatonin. Use lamps, candles, or amber-tinted bulbs
No screens after 9:30pm — or use blue light glasses if screens are unavoidable. Blue light directly inhibits melatonin production at a time when melatonin is already declining
A warm bath or shower 60–90 minutes before bed — this sounds counterintuitive but it works. The warm water raises your skin temperature, and when you get out, your core body temperature drops rapidly, triggering the sleep-onset signal your brain is looking for
No alcohol after 7pm — alcohol feels sedating but it fragments sleep architecture, suppresses REM sleep, and worsens night sweats significantly. If sleep is your goal, this is one of the highest-impact changes you can make
Supplements that have evidence behind them
Always check with your healthcare provider before starting any supplement, especially if you are on medication. These are the ones I find most useful clinically at this stage:
Magnesium glycinate — 200–400mg, 30–60 minutes before bed. This is my first recommendation for almost every client with disrupted sleep. Magnesium supports GABA — your brain’s main calming neurotransmitter — and helps lower cortisol. Glycinate is the most absorbable and gentlest form on digestion. Take it with a small amount of food
L-theanine — 100–200mg, taken with magnesium before bed. An amino acid found naturally in green tea that promotes relaxed alertness and supports sleep quality without sedation. Particularly useful for the “wired but tired” feeling that is so common in perimenopause
Ashwagandha (KSM-66 form) — 300–600mg, taken in the evening. An adaptogenic herb with strong evidence for reducing cortisol, improving sleep quality, and supporting the HPA axis — the stress-hormone system that is often dysregulated in perimenopause. Give it 4–6 weeks to show its full effect. Check with your provider if you have thyroid conditions
Melatonin — 0.5–1mg, 60 minutes before your target sleep time. Note the dose — most over-the-counter melatonin is far too high (3–10mg). Research consistently shows lower doses are more effective for sleep onset, and high doses can actually disrupt your natural melatonin rhythm over time. Start at 0.5mg and only increase if needed
📚 RESOURCES WORTH BOOKMARKING
These are tools and trackers I recommend to clients — free or low cost, genuinely useful:
Tracking your sleep:
Oura Ring — the most accurate wearable for sleep staging, HRV, and temperature tracking. Particularly useful for spotting the nights your temperature spikes with a hot flash even if you didn’t fully wake. Not cheap but worth it if sleep is a significant issue
Whoop — subscription-based, strong on recovery and HRV data, good for spotting patterns over weeks and months
Free option: Sleep Cycle app — uses your phone’s microphone to track sleep phases and wake-up quality. Not as accurate as a wearable but useful for spotting patterns without spending anything
Understanding your hormones and sleep:
“The Menopause Brain” by Dr. Lisa Mosconi — the most accessible, science-backed book on what estrogen decline does to the brain, including sleep. Written by a neuroscientist who researches this specifically. Highly recommend
“Why We Sleep” by Matthew Walker — the foundational sleep science book. Read alongside Mosconi for the full picture
For tracking food, mood, and sleep together:
Bearable app — specifically designed for symptom tracking across multiple categories including mood, sleep, food, and energy. Free version is genuinely good. Allows you to spot correlations across weeks of data
Clue or Natural Cycles — if you are still cycling, these apps track cycle phase alongside symptoms and can help you identify whether your worst sleep clusters in a specific hormonal window
If you want to go deeper on the HRT conversation for sleep:
The Menopause Society (menopause.org) — the most credible, up-to-date resource on hormone therapy evidence. Their position statements are written for patients as well as clinicians
Balance Menopause (balance-menopause.com) — Dr. Louise Newson’s UK-based resource. Excellent evidence-based content on sleep, HRT, and perimenopause specifically. Free symptom checker and downloadable resources
⚡ THIS WEEK’S ACTION STEP
Tonight, take magnesium glycinate 30–60 minutes before bed — 200mg is a good starting dose to begin with. If you don’t have it yet, order it today and in the meantime dim your lights and put your phone face down by 9:30pm. One intervention, tonight. Track how you feel on waking tomorrow and add it to your sleep diary.
🔬 SCIENCE SPOTLIGHT
A 2023 meta-analysis reviewed 19 randomised controlled trials on magnesium supplementation and sleep quality. It found that magnesium significantly improved sleep onset, sleep duration, and sleep efficiency — with the strongest effects seen in older adults and people with baseline magnesium deficiency, which as we know is extremely common in perimenopausal and postmenopausal women.
The mechanism is direct: magnesium regulates GABA receptors in the brain — the same receptors targeted by many pharmaceutical sleep aids — and also suppresses the HPA axis, reducing the cortisol that keeps you wired at 3am. It additionally helps regulate core body temperature, which as we covered in the free section is one of the primary drivers of night waking at this stage.
Takeaway: Magnesium glycinate is not a wellness trend. It is one of the most evidence-backed, low-risk sleep interventions available, and most women at this stage are deficient in it.
💛 CHANTAL’S CLIENT INSIGHT
One of my clients came to me at 53, postmenopausal, waking consistently between 2 and 4am and unable to get back to sleep. She had tried melatonin , 5mg, which is a common over-the-counter dose, and felt it made no difference. She was exhausted, frustrated, and beginning to dread going to bed.
We made three changes: dropped her melatonin to 0.5mg taken 60 minutes before her target sleep time, added magnesium glycinate at 300mg alongside it, and she committed to no screens and dimmed lights from 9:30pm. We also dropped the glass of wine she’d been having to “help her relax” — which, as we know, was doing the opposite.
Within ten days she was waking once instead of three times. Within three weeks she was sleeping through most nights. She told me: “I thought I just needed more wine and more willpower. Turns out I needed less of both and more magnesium.”
Your sleep can change. Sometimes faster than you’d expect.
📅 THIS IS WEEK 4 — YOUR MONTH 1 Q&A IS THIS WEEK
This is your final newsletter of Month 1 — and your live Q&A is happening this week. Bring your sleep questions, your tracking observations, anything from the past four weeks that you want to dig into. I’ll be there live to answer in real time.
Your Month 1 Worksheet PDF is also available to download now — it covers all four weeks of tracking tools in one place.
Download your Month 1 Worksheet
Want to go even deeper with personalised support? I work with a small number of 1:1 clients each month to build a plan tailored specifically to your hormones, history, and lifestyle.
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