Ghrelin follows your established eating patterns, rising in anticipation of meals and falling whether or not you actually eat. Research by Cummings shows ghrelin operates as an anticipatory signal, not a continuous hunger alarm. That 12pm hunger isn’t biological necessity — it’s learned timing. Change the pattern, and ghrelin adapts over days to weeks.
This companion covers ghrelin basics, the anticipatory pattern, adaptation to new schedules, and practical implications for fasting. (3 min read)