Tests, Fixes, and Ideas That Are Shaping My Longevity Strategy

Does Hormone Replacement Therapy Help with Sleep in Menopause?

Hormone replacement therapy can improve sleep in menopausal women, but the benefit depends on whether vasomotor episodes are driving the sleep disruption. In women with hot flashes and night sweats, a meta-analysis of over 15,000 women found moderate sleep improvement. The regimen with the largest effect size in head-to-head comparisons was transdermal 17-beta-estradiol combined with […]

Does Hormone Replacement Therapy Help with Sleep in Menopause? Read Post »

What cognitive behavioral therapy can (& can’t) do for 3 a.m. wakeups after 50

You’ve probably seen “CBT-I” mentioned as the non-drug treatment for insomnia. Cognitive Behavioral Therapy for Insomnia (CBT-I) is a structured, skills-based approach that changes habits, thoughts, and scheduling around sleep.

Insomnia becomes more common with age; roughly 20–30% of older adults live with insomnia, often for years. It’s linked with memory and concentration problems, mood changes, higher fall risk, and worse outcomes in conditions such as heart disease and chronic pain.

Major guidelines, including those supported by the American Academy of Sleep Medicine, recommend CBT-I as the first-line treatment for chronic insomnia, especially in older adults where sedative-hypnotic drugs can raise fall and confusion risk.

At the same time, CBT-I has trade-offs:

It asks you to follow a very regular schedule and temporarily cut time in bed (“sleep restriction”), which can be tiring in the short term.

It takes effort: sleep diaries, behavioral changes, and challenging long-held beliefs about sleep.

Access can be limited – there are not many clinicians trained in CBT-I, and traditional one-to-one therapy is time-intensive and expensive.

In this review, we’ll walk through four recent peer-reviewed studies (2023–2025) that help answer practical questions for adults in midlife and beyond:

What can CBT-I actually do for sleep and daytime function?

How does it seem to work in the brain?

What’s realistic to expect – and by when?

Who tends to benefit most, and where are the limits?

How can you use this evidence to decide whether CBT-I is a good fit for you?

Let’s get started.

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Why Can’t You Sleep Before Your Period?

Premenstrual insomnia has three converging causes. Progesterone drops in the late luteal phase, withdrawing GABAergic sedation that maintained sleep earlier in the cycle. Core body temperature rises approximately 0.4 °C after ovulation, blunting the nocturnal temperature drop that normally initiates sleep. In one study, melatonin onset was delayed by up to 90 minutes in the

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What Causes the “Wired but Tired” Feeling in Menopause?

The “wired but tired” pattern — exhaustion during the day, hyperarousal at night — reflects a flattened cortisol curve driven by HPA axis dysregulation. In perimenopause, declining and fluctuating progesterone reduces allopregnanolone-mediated GABA-A inhibition of the HPA axis, while declining estrogen reduces serotonergic arousal regulation. The result: cortisol runs too high at night and too

What Causes the “Wired but Tired” Feeling in Menopause? Read Post »

Why Doesn’t Melatonin Work for Menopause Insomnia?

Melatonin supplements add melatonin directly — but in menopause, the problem starts upstream. Estrogen supports serotonin production, and serotonin is the biochemical precursor to melatonin. When estrogen declines, the entire synthesis chain is impaired. Two independent meta-analyses (Yi et al., 2021; Du & Tan, 2026) found melatonin supplementation did not improve sleep quality in menopausal

Why Doesn’t Melatonin Work for Menopause Insomnia? Read Post »

Why Do You Wake Up at 3am During Menopause?

Around 3am, melatonin output declines while cortisol begins its pre-dawn rise. In perimenopause and menopause, declining progesterone and estrogen weaken HPA axis regulation that normally keeps this cortisol rise gradual. The result is an earlier, sharper cortisol spike that triggers arousal hours before your alarm. This nocturnal cortisol pattern explains why many midlife women wake

Why Do You Wake Up at 3am During Menopause? Read Post »

Does Keto Cause 3am Waking? What Happens to Blood Sugar When You Cut Carbs

Carbohydrate restriction depletes liver glycogen — the stored glucose the brain draws on during sleep. When the normal 3-4am cortisol rise occurs, the liver has less glycogen to release and relies more on gluconeogenesis, where cortisol stimulates glucose production from non-carbohydrate sources like amino acids and glycerol. In a 2026 study of 220 people with

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Your Brain Makes Its Own Sleep Drug—And It’s More Sophisticated Than Valium: progesterone for sleep

Your brain produces allopregnanolone, a metabolite of progesterone, that acts on the same GABA-A receptors as benzodiazepines—but reaches receptor sites that sleep medications cannot access. Where benzodiazepines produce short bursts of sedation that suppress deep sleep and REM, allopregnanolone generates steady background calming that preserves natural sleep architecture. Allopregnanolone activates both synaptic and extrasynaptic (δ-containing)

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Can Fixing Your Gut Fix Your Sleep? How Gut Bacteria Entrain Your Body Clock

Gut bacteria produce short-chain fatty acids — butyrate, propionate, and acetate — that entrain peripheral circadian clocks by inhibiting histone deacetylase enzymes and modulating PER2 expression. A 2022 study in Gastroenterology showed that microbial SCFAs induce concentration-dependent phase shifts of several hours in intestinal circadian oscillations. Two meta-analyses of probiotic randomized controlled trials confirm improved

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