The circadian Rhythm is basically your biological clock.
it affects all functions of the body and hormone secretion schedule during day and night.
Lets take the pineal gland for example, it only secrets melatonin when we sleep at night while it is dark .
and one of its primary goals is to detox the body. However if we don’ts sleep within that cycle or our nights are filled with light, the pineal gland function will be disturbed