Saliva test that measures your biological clock to time treatment
TimeTeller GmbH, a 2023 spin-off from Charité research, develops an in-vitro diagnostic that profiles a person's circadian rhythm from at-home saliva samples using molecular gene-expression analysis and computational modelling, then gives personalised timing recommendations for sleep, meals, light and exercise. It is being used in clinical studies to optimise the timing of medical treatments, including for cancer patients, and was selected for the TechCrunch Disrupt 2026 Startup Battlefield Top 20.