Before going to sleep at night or before getting out of bed are great times to do it because you are in a half sleep state of alpha brain wave. (raisefrequency.com)
Teaching people to generate alpha brain waves, for example, can significantly reduce cortisol much more than stimulating any adrenal reflex. (philmaffetone.com)
L - Theanine (an amino acid that can increase alpha brain wave activity to promote relaxation and mental alertness) (uncommonwisdomdaily.com)