Ghrelin, a ligand for the growth hormone secretagogue receptor, is an orexigenic hormone
produced in the gastrointestinal tract. In humans and other animals, circulating ghrelin levels
fluctuate over the course of the day in relation to food intake. If circulating ghrelin plays a role
in determining food intake from meal to meal, it will be important to understand the factors
that regulate plasma ghrelin levels in relation to feeding. Circulating ghrelin levels also
appear to reflect body weight changes over the longer term, raising the possibility that …