What to watch with Cortisol senken and sleep?

When aiming to lower cortisol and improve sleep, watch for several key factors. Genetic variants in COMT (stress neurotransmitter breakdown) or NRF2 (antioxidant defense) have small effects – no supplement is proven to 'fix' them. Your circadian clock (CLOCK/PER genes) influences chronotype, but light exposure and lifestyle matter more. Beware of too-low cortisol (adrenal fatigue) as well as high cortisol. Best practice: measure cortisol via saliva (diurnal profile) and prioritize sleep hygiene – consistent bedtime, blue-light reduction, no caffeine after 2 PM. Supplements like magnesium, ashwagandha, or L‑theanine may help, but evidence is moderate. Check thyroid function (TRH, TSH) because thyroid issues can disrupt cortisol metabolism. Caveat: consumer DNA tests cannot diagnose – see a doctor for persistent sleep or stress issues.