Every organism is very complex and the human body is one of the more complex.
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When mice are housed in constant bright/dim light, they consume more food during the subjective light phase. These mice exhibit significantly increased body mass and reduced glucose tolerance compared with mice under standard light/dark cycles, despite similar caloric intakes and total motor activity.
Genes being expressed as a reaction to a factor or genes being expressed at a different time than usual can lead to a cascading effect.
I just want to let you guys know that I'm a person who doesn't care about time. I eat whenever I want, usually right before bed.