The DUTCH Podcast Decoding the HPA Axis: How Stress, Cortisol & Circadian Rhythms Shape Our Health
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Nov 26, 2024 
Tom Guilliams, a dietary supplement expert and founder of the Point Institute, joins Dr. Jaclyn Smeaton to decode the HPA axis's role in stress and health. They explore how cortisol affects metabolism and discuss the impact of early life stressors. The conversation touches on circadian rhythms, gut inflammation, and the link to obesity. They also delve into holistic approaches for HPA dysfunction, emphasizing adaptogens and the necessity of physical activity for resilience. Gender differences in stress responses and burnout factors are highlighted for a comprehensive understanding.
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Brain Chemistry Shapes Stress Response
- Brain neurochemistry, including neurotransmitters and neurosteroids, modulates how stressors are perceived and HPA axis responses.
- This biochemical filter explains why individuals vary greatly in stress sensitivity and anxiety levels.
Circadian Rhythm's Impact on HPA Axis
- Circadian rhythms regulate cortisol secretion which synchronizes peripheral clocks across organs.
- Disruptions from jet lag or shift work stress the HPA axis and drain its reserve capacity.
Sleep Quality Influences Cortisol Response
- Sleep disorders like sleep apnea blunt the cortisol awakening response, impairing HPA axis plasticity.
- Improving sleep quality restores more robust morning cortisol release and HPA function.