Delayed sleep onset is linked to decreased melatonin clearance, delayed melatonin peaks, increased melatonin levels during daytime and altered circadian variation of core body temperature
One of the critical limitations is the absence of a standardized formula or content with an unknown dosing regimen
formal human studies have primarily used doses up to ~300 mcg daily [7]
By age 60, levels drop to around 80 ng/mL, a 60% reduction
Free Radical Damage and Reproductive Cells Oxidative stress occurs when your body produces more free radicals than it can clear
Conversely, other PK studies imply that increasing age has no effect on toxicity [68,69,70,71,72]