> there's no details on why. It's explained in the paragraph right before the one you quoted. >A look at their hormone levels showed why: Eating later caused

> there's no details on why. It's explained in the paragraph right before the one you quoted. >A look at their hormone levels showed why: Eating later caused their levels of ghrelin, a hormone that increases appetite, to spike, while simultaneously suppressing their levels of leptin, a hormone that causes satiety.