People who get bright light before 10 AM weigh on average 1.5 BMI points less — and it has nothing to do with exercise or vitamin D. A Northwestern University study proved that the timing of light exposure independently predicts body weight.Topics covered:- How 20,000 neurons in your brain control your entire metabolism- The cortisol awakening response and why you want high cortisol in the morning- How light timing controls leptin, ghrelin, and hunger signals- 17% worse glucose tolerance in the evening vs morning- Why blue light at night impairs your pancreas- The free 10-minute habit that realigns everythingSources: Northwestern University (Zee et al., 2014), PLOS ONE, Huberman Lab, Diabetes & Metabolism Journal