Key facts
- TimeTeller's saliva test analyzes circadian rhythms.
- The company's long-term goal is to time cancer treatments for better tolerance and effectiveness.
- TimeTeller has partnered with German health insurer Techniker Krankenkasse.
German startup TimeTeller has developed a saliva test to analyze individuals' circadian rhythms, aiming to personalize cancer treatments and reduce side effects. CEO Angela Relógio cautioned that the direct-to-consumer kit does not yet provide personalized medicine timing, which requires clinical studies.

TimeTeller's approach could lead to more effective and less burdensome cancer treatments by aligning them with a patient's internal biological clock, potentially improving patient outcomes and reducing healthcare costs.
German startup TimeTeller is developing a saliva test kit to analyze individuals' circadian rhythms, with the long-term goal of personalizing cancer treatments to improve tolerance and effectiveness. CEO Angela Relógio, a physicist-engineer and molecular biologist, emphasized that while the test can provide insights into sleep, nutrition, and activity, its direct-to-consumer version does not yet offer precise timing for medical treatments, which requires clinical studies. The company has begun accepting direct orders due to demand from longevity clinics and has partnered with Techniker Krankenkasse, one of Germany's largest health insurers, for test reimbursement. Relógio's research into cancer patient side effects inspired the development of the circadian rhythm test.
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