The circadian clock
ticks in virtually every body cell

The biological clock, also known as the circadian clock, regulates the timing of many cellular and molecular mechanisms and plays a vital role in maintaining human health. Disruption of your circadian rhythms is associated with diseases like sleep disorders, depression, diabetes, neurodegenerative diseases, obesity and cancer. A dysregulated circadian clock can impair both physical and cognitive performance.

Why TimeTeller?

We all have our own
circadian rhythm

Circadian rhythms and the timing of our molecular processes differ from person to person. Knowing your personal circadian rhythms and adjusting activities such as sleep, exercise, daylight or medicine intake according to your internal timing can improve health and reduce recovery or therapy time in patients.

This image has an empty alt attribute; its file name is TimeTeller_Rythms_4er@2x.png

TimeTeller profiles your unique circadian rhythm

We have developed a non-invasive method to profile the personal circadian rhythm. Using an easy, risk-free at-home test, you send your samples to TimeTeller for analysis and get a personal report back.

TimeTeller profiles your circadian clock using molecular analysis of saliva samples and mathematical modelling to provide personalized recommendations for lifestyle adjustments or medical treatment timing.

TimeTeller in cancer care

Adjusting the timing of medical treatment to the circadian rhythm of the individual patient can optimize efficacy and diminish unwanted side effects, leading to improved life quality for patients and reduced healthcare costs.

We currently participate in clinical studies to validate and bring the benefits of our method to cancer patients in Germany and beyond.


Prof. Dr. Angela Relógio
Group Leader – Systems Biology of Cancer
Institute for Theoretical Biology-ITB
Molecular Cancer Research Centre-MKFZ
Charité Medical University of Berlin