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

Do GLP-1 Drugs Disrupt Your Body Clock? Ozempic, Circadian Rhythms, and Melatonin

Metabolic Sleep, Sleep & 3AM Wakeups /

Your body’s own GLP-1 secretion follows a circadian rhythm driven by clock genes in your gut — it peaks before your active feeding period and drops at night. Semaglutide has an elimination half-life of about one week, creating sustained GLP-1 receptor exposure that does not follow the short endogenous secretion rhythm. Meanwhile, melatonin — your […]

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Why Will Your Nervous System Not Let You Sleep? Polyvagal Theory and Insomnia

Autonomic Sleep, Sleep & 3AM Wakeups /

Polyvagal theory describes three autonomic states that shape whether sleep is possible. The ventral vagal state — associated with safety and social engagement — supports the parasympathetic activation sleep requires. Sympathetic activation produces hyperarousal: elevated heart rate, cortisol, and alertness that prevent sleep onset. The dorsal vagal state produces a collapse response — extended sleep

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Does Benadryl Degrade Your Sleep? How Anticholinergic Drugs Suppress Rapid Eye Movement Sleep

Autonomic Sleep, Sleep & 3AM Wakeups /

Diphenhydramine (Benadryl) promotes sleep onset by blocking histamine H1 receptors, but its anticholinergic activity suppresses REM sleep and prolongs REM latency. Muscarinic acetylcholine receptors are required for REM generation – a 2018 genetic study found that eliminating two muscarinic receptor subtypes virtually abolished REM in mice. Bladder antimuscarinics and tricyclic antidepressants produce the same effect

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Can Insomnia Be the First Sign of Perimenopause — Even Without Hot Flashes?

Sleep & 3AM Wakeups, Women's Hormones and Sleep /

Yes. Progesterone declines before estrogen in early perimenopause, and since progesterone metabolites drive GABA-mediated sleep maintenance, insomnia can appear before hot flashes, irregular periods, or other recognizable changes. Longitudinal data from the Study of Women’s Health Across the Nation show that sleep disruption is not fully explained by vasomotor episodes. For many women, fragmented sleep

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How Long Does It Take to Reset Your Circadian Rhythm?

Circadian Sleep, Sleep & 3AM Wakeups /

Resetting your circadian rhythm takes different amounts of time depending on which clock you are resetting and what caused the misalignment. The suprachiasmatic nucleus — the brain’s master pacemaker — re-entrains to a new light schedule in 1 to 3 days. Peripheral clocks in the liver, gut, and muscle take 5 to 8 additional days

How Long Does It Take to Reset Your Circadian Rhythm? Read Post »

How Do Blood Sugar, Cortisol, and Leptin Control Whether You Sleep?

Metabolic Sleep, Sleep & 3AM Wakeups /

During sleep, insulin manages blood glucose, cortisol drops to its 24-hour low, and leptin rises to suppress hunger and support overnight repair. These three hormones follow a timed sequence: insulin rises after your last meal, leptin peaks roughly six hours later around 4am, and cortisol reaches its nadir between midnight and 2am before beginning its

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Does Ozempic Give You Anxiety at Night? Why GLP-1 Drugs May Contribute to Nighttime Panic

Metabolic Sleep, Sleep & 3AM Wakeups /

GLP-1 receptor agonists like semaglutide act on GLP-1 receptor pathways that include brain regions involved in arousal, stress responses, appetite, and visceral sensation. In rodent work, semaglutide accessed selected brainstem, hypothalamic, septal, and ventricular-adjacent sites rather than crossing the blood-brain barrier broadly. At night, when external stimulation drops, internal arousal, nausea, lower overnight fuel availability,

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Which Nicotinamide Adenine Dinucleotide Precursor Improves Sleep — Nicotinamide Mononucleotide or Nicotinamide Riboside?

Metabolic Sleep, Sleep & 3AM Wakeups /

Based on current controlled trial evidence, NMN has stronger direct support for sleep improvement. Two randomized controlled trials show NMN at 250 mg/day reduces daytime drowsiness and improves Pittsburgh Sleep Quality Index scores in older adults, with afternoon dosing producing the largest effects. NR reliably raises NAD+ levels — by approximately 40% at standard dose

Which Nicotinamide Adenine Dinucleotide Precursor Improves Sleep — Nicotinamide Mononucleotide or Nicotinamide Riboside? Read Post »

Can a Viral Infection Cause Chronic Insomnia? How Viruses Disrupt Your Autonomic Nervous Regulation and Your Sleep

Autonomic Sleep, Sleep & 3AM Wakeups /

Viral infections — including COVID-19, Epstein-Barr virus (EBV), influenza, and the original SARS coronavirus — can cause chronic insomnia that persists months or years after the acute illness resolves. The mechanism involves autonomic nerve damage: viruses can injure vagal pathways, trigger persistent neuroinflammation, and disrupt the parasympathetic regulation that sleep requires. A systematic review of

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