Written by the PureMuze team and published October 7, 2026. This article is general information, not medical advice, and is not a substitute for a consultation with a licensed clinician.
You go to bed tired and your brain will not switch off. Or you fall asleep easily and wake at two or three in the morning, wide awake, and cannot get back. If that started in your forties, the panel had an explanation that most sleep advice skips: your hormones have changed what sleep needs from you.
Melatonin goes first
“Before any of our sex hormones decline, melatonin starts to decline,” Angela Foster said. That is why the habits you used to get away with, the late screen, the glass of wine, the 11pm email, start to cost real sleep in your forties. The buffer is thinner.
Then progesterone
Progesterone is the calming hormone, and it is the first of the sex hormones to fall in perimenopause. Dr. Sarah Bonza described its loss as the most direct cause of the 2am waking: “As women lose their progesterone, the most frequent symptom is waking up at two or three a.m. and having trouble falling back asleep.” Night sweats, where they occur, come from the estrogen swings on top. In her practice, restoring progesterone is one of the things patients notice fastest; whether that is appropriate for you is a question for your own clinician, and it is a prescription decision, not a supplement one.
Cortisol, and why mornings matter
Cortisol and melatonin work in opposition: when cortisol is high at night, melatonin stays low. The lever Angela reaches for first is morning light. Getting outside soon after waking, even on a grey day, strengthens the cortisol awakening response and sets a rhythm where cortisol rises in the morning and falls through the day, which is what lets melatonin rise at night. The evening is the second half of the same rhythm: a wind-down that actually lowers cortisol before bed, rather than expecting sleep to do it.
We ask too much of sleep
Angela relayed a line from a sleep scientist that reframes the problem: we ask sleep to repair and recharge us, and we also ask it to be our wind-down and our stress relief, which it is not. The entry into sleep has to be built. A warm bath or hot shower an hour before bed helps for a physical reason: the drop in body temperature afterwards is a sleep signal. Dim light, no work, and a repeatable ritual do the rest.
Supplements the panel discussed, with the caveat they gave
Angela was explicit that she could not give advice and that these are things to discuss with a practitioner. Within that framing, what she described:
- Glycine, which is calming through the GABA pathway and lowers body temperature slightly, and which many people already take as part of magnesium glycinate. Her own ritual is chamomile tea with a little glycine in the evening; chamomile contains apigenin, which is also sleep-supportive.
- L-theanine, promising for calming the mind before sleep, with early animal research on protection during sleep deprivation. Not a substitute for sleep.
- Phosphatidylserine, which some people find helpful for an overactive stress response at night.
- Adaptogens like ashwagandha are strong, and the panel’s caution applied most here: “because it’s a supplement, we think maybe not so much, but in actual fact they do” have a powerful effect on the body.
Find your domino
You cannot fix morning light, the wind-down, stress, exercise and nutrition at once, and trying to is how routines collapse. Angela’s advice is to find the one change that tips the others over. For many women that is exercise, which improves sleep, which improves food choices. For others it is the morning walk. Pick one, keep it for a month, and let the rest follow.
If sleep has changed alongside your cycle, mood or energy, it is worth reading Perimenopause can start at 35 and What to test in perimenopause, and raising the whole pattern with a clinician rather than treating the nights on their own.
The session, and this article, are general health education, not medical advice. Neither the panelists nor PureMuze are your clinicians, and nothing here is a diagnosis or a treatment recommendation for you. If something applies to you, take it to your own clinician.
