The sun

The influence of sunlight and daylight on our biorhythm and well-being

Sunlight plays a central role in our health and well-being. It is far more than just a source of light - it is a biological clock that determines our internal rhythm. The daily quantity and quality of daylight directly influences our so-called circadian rhythm - the internal clock that controls sleep-wake cycles, hormone production, body temperature and many other physiological processes.

The importance of natural light

The day begins for our body at dawn, i.e. before the sun actually rises. The increasing light signals the brain, in particular the hypothalamus, to reduce the production of the sleep hormone melatonin and prepare the body for wakefulness and activity. Conversely, as dusk falls in the evening, a biological signal for retreat begins - melatonin is increasingly released, bodily functions slow down and sleep pressure increases.

This close link to the course of the day explains why a lack of light - especially in winter or if you lead a very “indoor” lifestyle - can lead to sleep disorders, concentration problems, mood swings and even serious health problems in the long term.

The course of the sun as a biological clock

The precise calculation of sunrise, sunset and twilight times in deepr.life is based on the geographical location and the respective time zone. These times are not abstract values, but have a tangible effect on our daily rhythms. It is important to note that the information relates to the next relevant point in time. For example, if the sun has already set but twilight is still continuing, the twilight time still applies to the current day, while sunset is already related to the next day.

Light - an underestimated health factor

A regular supply of light - ideally daylight - helps to stabilize the biorhythm and measurably improves mood. Exposure to morning light in particular has been shown in studies to be especially effective against depressive moods. The quality and duration of sleep also improves with sufficient exposure to daylight. In addition, sunlight promotes the body's own vitamin D production, which is essential for the immune system, bone health and numerous metabolic processes.