Eat the same bowl of pasta at breakfast and at dinner, and your body will tell two different stories. In the morning, insulin sensitivity is near its daily peak: glucose rises, insulin answers efficiently, and the curve settles within a couple of hours. In the evening, the same meal typically produces a higher, longer glucose excursion — a well-documented effect of circadian insulin resistance.
Why it happens: as the day progresses, melatonin onset and shifting cortisol levels reduce how strongly muscle and liver respond to insulin. The pancreas compensates with more insulin, which takes longer to clear the same load.
What this means in practice is descriptive, not a rule. Some people see a 20–30% larger evening response; others barely notice. That is exactly the kind of pattern IQFood’s engine surfaces: log the same meal at different times for a week and the curves show your difference, not a population average.
Things people commonly observe in their own data: carb-heavy dinners produce the tallest curves of the day; an after-dinner walk visibly flattens them; and earlier dinners leave more of the night in fat-burning mode. None of this is medical advice — it is your own physiology, made visible enough to reason about.