Testosterone, growth hormone, and DHEA all decline as men age — starting as early as the late 20s and accelerating after 40. These hormonal changes don’t reduce sex drive and muscle mass alone; they directly alter the brain’s ability to produce and maintain deep sleep. Declining testosterone function involves three concurrent changes: falling production from […]
Overview: Metabolic impairment — including insulin resistance, blood sugar instability, mitochondrial decline, and disrupted fat metabolism — can directly fragment sleep and degrade its deepest and restorative stages. Five mechanisms contribute: Insulin resistance suppresses slow-wave sleep — the deepest sleep stage responsible for overnight metabolic restoration — creating a self-reinforcing cycle where less deep sleep
Overview: Circadian disruption occurs when the body’s internal ~24-hour clock — controlled by the suprachiasmatic nucleus in the hypothalamus — loses alignment with the external light-dark cycle or with the body’s own organs and tissues. Five mechanisms link circadian disruption to fragmented sleep, 3am wakeups, and light shallow sleep: Orexin timing misalignment — the suprachiasmatic
Overview: Inflammatory sleep disruption occurs when persistent, low-level immune activation — elevated cytokines, overactive inflammatory pathways, and immune cells in a sustained activated state — can interfere with the biological processes that produce and maintain sleep. Five mechanisms appear to contribute to it: Cytokine overload — chronic elevation of IL-6, TNF-α, and IL-1β is associated
Magnesium alone is not enough to solve everyone’s sleep problems because not all sleep problems are caused by low magnesium. The benefit of magnesium supplementation tops out once the magnesium deficiency is no longer present — and magnesium does not solve sleep problems that aren’t related to magnesium in the first place. This piece walks
Your dinner can wake you up at 3 a.m. through reflux that happens during sleep without heartburn — and because your conscious awareness of what’s happening in the esophagus drops during sleep, you may not feel it. This video walks through what’s happening in your esophagus while you sleep, why the reflux and light shallow
Overview: Autonomic sleep disruption occurs when the body’s involuntary regulation — heart rate, stress hormones, and neural inhibition — fails to transition properly into sleep mode. Three mechanisms can drive it: Weakened vagal tone — parasympathetic activation doesn’t engage at sleep onset, leaving heart rate elevated through the night Reduced GABA — the brain’s primary
Autonomic Sleep Disruption: What It Is, How It Fragments Sleep, and How to Recognize It Read Post »
Most people who come to Kat are already on melatonin — and one of the first things she does is figure out whether they actually need it. The gap between how people take melatonin and how their body uses it tends to be where the confusion lives. This video walks through three things that change
When I Actually Suggest Melatonin… (Almost Never) Read Post »
A glass of wine at dinner can feel like it’s helping you relax and fall asleep faster — but alcohol is also altering your autonomic balance, impairing blood sugar regulation, and disrupting REM sleep in ways that converge at 3 a.m. Even one to two standard drinks can alter the natural sleep architecture your brain
Peeing at night is often misunderstood, and the specific pattern of nighttime urination points to different potential causes and different solutions. For the generally healthy individual, nighttime peeing falls into sleep-related and non-sleep-related categories, each with distinct drivers. Changes in antidiuretic hormone regulation, reproductive hormones, and sleep disruption all play a role in why this
