Overview
- The Frontiers in Nutrition paper published in early July used five‑day data from 287 European and Pacific New Zealand women aged 18–45 and found evening chronotypes had higher BMI, greater total and abdominal fat, and worse cholesterol and glucose measures than morning-types.
- Total daily calorie intake was similar across groups, but morning-types ate most of their energy earlier in the day while evening-types shifted calories into late evening and night, roughly between 8pm and 3am.
- Study authors say the timing matters because the body’s circadian rhythms alter how food is processed, and they advised practical steps for night owls such as stopping eating two to three hours before bed and getting morning daylight to move internal clocks earlier.
- The research is observational and limited by its same‑sex, age‑restricted sample and a small early‑riser subgroup, so the results do not prove that late eating causes the worse body composition or biomarkers.
- The paper strengthens evidence for chrononutrition — that meal timing affects metabolism — and highlights the need for larger, more diverse samples and interventional trials to test whether shifting meal times improves health.