The Loft at UC San Diego

A campus talk with a specific audience problem in view. Student life runs almost exactly counter to circadian biology, with late nights, irregular meals, bright screens after dark and sleep compressed into whatever hours are left, and the costs show up in mood, learning and metabolic markers rather than in anything that feels like illness.

Dr Panda makes the case with his own research. Melanopsin, the blue light sensor he identified in a subset of retinal cells, is what allows light to set the brain's clock. Late evening light activates it at the wrong hour and suppresses melatonin. Meanwhile the clocks in the liver and gut take their cue from feeding, so an eating pattern spread across sixteen hours leaves them unanchored. Further work on light quality, intensity and timing has shown effects on mood, mental health and even recovery in hospital settings.

The practical portion is aimed at what a student can realistically change during a term, which makes it more useful than the usual sleep hygiene talk.