Night owls have, according to a U.K. cohort study. Biobank higher risk of cardiovascular diseases, but mostly it depends on their overall health behavior.[1] A new study in Experimental Physiology has shown that night owls are more prone to diabetes and heart disease compared to morning nightingales because their bodies do not burn fat for energy as efficiently.[1] Morning nightingales were more sensitive to insulin levels and burned more fat than night owls both at rest and during exercise.[1] Night owls had lower insulin sensitivity and burned more carbohydrates instead of fat for energy.[1] The study shows a higher risk of obesity, type 2 diabetes and cardiovascular disease in night owls compared to morning nightingales.[1] People with an evening chronotype have a significantly higher risk of depression, heart disease, and metabolic disorders.[2] Regular exposure to light at night increases the risk of death, especially if they are in the dark during the day.[3]