Why We Sleep
Matthew Walker's synthesis of sleep science explores the mechanisms of circadian rhythms and sleep architecture to explain their vital roles in human health and cognitive function. The book details the biological consequences of chronic sleep deprivation, including its effects on metabolic regulation, immune response, and emotional stability.
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ADHD adults experience chronically elevated cortisol from executive function friction, rejection sensitivity, and daily overwhelm. Six supplements have meaningful clinical evidence for cortisol reduction, and several work especially well for the ADHD nervous system.
**Low cortisol—a state of adrenal insufficiency or dysregulation—can amplify ADHD symptoms by depleting energy reserves, impairing focus, and disrupting the brain's stress-response systems.** While ADHD is primarily a dopamine-related executive function disorder, cortisol plays a critical supporting role in maintaining alertness, regulating inflammation, and modulating the body's response to daily demands. When cortisol levels drop too low, adults with ADHD often experience worsening brain fog, fatigue, and difficulty initiating tasks—creating a compounding effect that standard ADHD treatments may not fully address.
For ADHD adults, cortisol does not just spike harder, it lingers longer. Rejection sensitivity, executive function strain, and chronic shame all load the stress axis in ways most cortisol guides ignore. This post covers what actually works for ADHD nervous systems, fast.
Alcohol sedates you but doesn't produce sleep — it produces a neurologically different state that suppresses REM sleep, causes rebound arousal at 3-4 AM, and leaves you more tired than if you hadn't drunk at all. Here's the science and what to do instead.