These fruits are bred to be larger, and contain more sugar, than ever before in history. We are frequently told that it’s okay—beneficial, even—to consume “unlimited” fruit, but looked at through an evolutionary lens, fruit (and particularly today’s cultivated, high-sugar versions) may be uniquely adept at tricking our bodies’ metabolisms.

I thought fruit was supposed to be eaten alone, otherwise it rots in our stomach?

Avoid too many sweet fruits: berries, apples or pears are fine, but sweet tropical fruits such as mango, pineapple, melon and bananas are full of sugar.

This is thanks in part to the fibrous matrix that the sugars are bound in, water, and other phytonutrients. Whole-fruit consumption is also self-limiting, because the fiber makes it more filling. For example, it would be quite difficult to eat five apples, but it’s a breeze to drink the sugar contained in five apples when juiced.