One of the life hacks I learned from my friend Jeffrey Lam, something he learned on a podcast. One way to hack your metabolism is immediately after waking up, go outside and expose yourself to some natural light.
Personally natural light as something I believe in for myself, my ideal house would just be a glass cube, surrounded by trees, with tons of natural light.
Why did a lot of ancient religions see the sun as God?
It seems to make sense: the sun is the source of all energy. Thus if you want more physical and physiology energy during the day, expose yourself to more sun?
Also another thought: sun is for the privileged.