I recently found out that my cortisol levels were slightly out-of-range throughout the day (saliva results upon wakening, lunchtime, 5 pm, and bedtime).
I have started taking PS (the version without soy or choline) taken at bedtime. It's said to lower cortisol levels by 30-70% (source: STTM).
There are several adaptogens: ashwagandha, holy basil, relora, rhodiola, eleuthero, maca, licorice root...I guess the latter is excluded since I am on medication for high blood pressure.
The information concerning these adaptogens is conflicting as some recommend them for high cortisol and some for low and some seem to be able to both lower and increase cortisol levels...which is why I'd appreciate input from others having successfully lowered cortisol levels naturally.