My cortisol is higher in the evenings. About 7 months ago I still couldn't get to sleep until 3:30 am, but now having been on Phosphatidylserine for about 6 months, I can fall asleep around 1 am. I have seen absolutely no change in my high cortisol levels with the earthing sheet, not now or in the past when I first used it. I hope it works for you!!