Metabolic Sleep | The Longevity Vault

Can a Blood Sugar Drop Wake You Up at 3am?

Yes. When blood glucose drops below approximately 70 mg/dL during sleep, the body releases epinephrine, cortisol, and glucagon to raise it back up. These same stress hormones activate the brain, producing the experience of waking abruptly — often between 2 and 4am — with a racing heart, sweating, or sudden alertness. This counterregulatory response occurs […]

Metabolic Sleep Disruption: How Metabolic Impairment Fragments Sleep and How to Recognize It

Sleep & 3AM Wakeups, Metabolic Sleep / Kat Fu, M.S., M.S.

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

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