NYT: Morning people may instinctively choose a healthier diet than night owls do.

Finnish researchers tracked the diets of 1,854 men and women ages 25 to 74 and used a well-validated questionnaire to classify them as morning people or evening types.

After controlling for age, sex, education, B.M.I., smoking, sleep time and other factors, they found that total energy intake did not differ between morning and evening types.

But on weekdays, evening types ate less in the morning and tended to choose breakfast foods that were higher in sugar and lower in fiber, carbohydrates and fats, including saturated fat. By evening, the night owls were eating more sugar and fats than the morning people

https://www.nytimes.com/2017/03/08/well/eat/night-owls-eat-less-healthfully-than-morning-people-do.html?