Cortisol and weight loss are linked via metabolism: chronically elevated cortisol promotes visceral fat storage and can hinder weight loss. From the context, magnesium supplementation (human-moderate evidence) may modestly lower cortisol, especially if you are deficient or stressed. Other key factors include sleep quality, stress management, and a balanced diet. A DNA or microbiome test cannot directly measure cortisol – a blood test is required. Evidence for direct genetic predictors of cortisol and weight is weak (marketing/unclear). Focus on holistic approaches: exercise, adequate sleep, stress reduction, and possibly magnesium. Caveat: Not a substitute for medical diagnosis if cortisol is high.
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