Episode 3 uses COMT as a practical lens for understanding signal duration and clearance in focus and stress physiology. We trace COMT through the mid 20th century discovery era of neurotransmitter inactivation, then connect it to prefrontal cortex function and later human genetics work on functional variation such as Val158Met. The episode stays focused on real world patterns like wired but tired and fog, then gives repeatable experiments around caffeine timing, light timing, sleep stability, training structure, and downshift rituals. The aim is a cleaner signal, steadier attention, and more predictable recovery, especially for high demand lifestyles like students building a business. Key Terms functions as the glossary, and listening again after vocabulary is familiar typically makes the episode land differently.

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