Common mistakes around cortisol and nutrition: Many people turn to supplements like ashwagandha or phosphatidylserine without first identifying the root cause (e.g., poor sleep, chronic stress). Evidence for such supplements is mostly mechanistic or based on small trials. Another mistake is focusing on single nutrients (e.g., magnesium) while ignoring lifestyle factors like exercise and stress management. Cortisol tests (saliva, serum) are often misinterpreted due to diurnal variation. MyBody-X notes that elevated cortisol cannot be corrected by diet alone. Genetic variants (e.g., NR3C1, FKBP5) lack sufficient evidence for tailored nutrition advice. A holistic approach with medical guidance is essential.
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