The Society for Light, Rhythms, and Circadian Health (SLRCH) is an international scientific non-profit organization devoted to promoting research and knowledge about the effects of light on the organism and the chronobiology of psychiatric as well as other medical disorders.

Founded in 1988 as the Society for Light Treatment and Biological Rhythms, the society has brought together leading scientific experts, clinicians, and interested participants from different professional and multi-disciplinary backgrounds for discussion and exchange on the science and practical application of chronotherapy in medicine.

Biological timing systems adapt to regular circadian and seasonal changes in the environment, and are found in many different forms of life. The last years have brought about an astounding surge in discoveries and scientific publications on the molecular background of biological clocks, including the award of the Nobel Prize for Physiology or Medicine 2017 for discoveries of molecular mechanisms controlling the circadian rhythm.  Many of our members were involved in breakthrough discoveries in this fascinating scientific field.

Much of the research development seen in Chronotherapeutics (e.g., light therapy, sleep time stabilization, sleep phase advance and wake therapy, melatonin and “dark” therapy) has been done by SLRCH members or collaborators, and promises to improve treatment in a wide range of psychiatric conditions.

SLRCH is helping the transition between molecular chronobiology and its clinical application in human health and medicine. Our goal is to make this knowledge of Chronotherapeutics available to all fields of modern medicine, and ultimately, to help improve treatment strategies and patient care.