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This book is the result of the author's many years of experience and observation throughout his 26 years in the stockbroking industry. It was written for general public to learn to invest based on facts and not on fantasies or hearsay....
laychee
1,743 posts
Posted by laychee > 2019-05-30 16:29 | Report Abuse
Change it to warm light or turn on blue light filter on new equipments.
Blue light excite cortisol, suppress melatonin.
We need cortisol to wake up from sleep, melatonin to fall asleep.
9pm, we need melatonin. 4am we need cortisol.
Too much cortisol and too less melatonin can degrade our immune system.