Transition from dim to bright light in morning induces an immediate elevation of cortisol

Well SupportedA morning pulse of cortisol, promoting wakefulness and immune function, occurs naturally every 24 hours and can be timed by sunlight.

Well SupportedBright light, particularly blue light, suppresses melatonin production; high exposure during the day and minimal exposure at night is beneficial.

Well SupportedHigher peak cortisol levels early in the day, achieved through bright light exposure, lead to lower cortisol levels later in the evening and at night, facilitating sleep.

Well SupportedDimming lights and using red light bulbs help keep cortisol levels low and prevent a reduction in melatonin levels.

Well Supported