Circadian Meal Timing

The same meal eaten in the evening produces a higher insulin spike and longer suppression window than if eaten in the morning. An 18-hour fast ending at noon is framed as more aligned with favorable insulin sensitivity than one ending at 4 PM. The article does not provide a complete meal-timing protocol for travel or individual metabolic conditions. Insulin sensitivity is highest in the morning and declines through the afternoon and evening. During travel, ghrelin and meal-timing cues may stay aligned with the old time zone and cause hunger at inappropriate local times. Hunger hormones and gut microbes are described as following rhythms. Meal timing is presented as a strong signal for gut bacteria and body clocks, while light strongly signals the brain clock. Finishing dinner at 8 or 9 PM creates a higher starting insulin baseline and pushes the fast endpoint outside the more favorable morning-to-noon window. Meal timing is presented as equally important to fasting duration. Fasting, light exposure, and deliberate meal timing are described as tools for resetting circadian rhythm during travel.