Life on earth follows the movement of the sun. The blue light that is emitted from the sun stimulates our brain to say it is time to rise. Our waking hormone, cortisol, surges, waking us up.
Many people have difficulty waking up, but, if 30-45 minutes after waking, you feel okay, then you are probably making enough cortisol to get you going. 50% of all the cortisol you make in a day is secreted between 30-45 minutes after waking.
To maintain your energy throughout the day, please read the section about blood sugar regulation.
Cortisol gradually declines throughout the day, whereas melatonin gradually increases, helping you to fall asleep.