Untamed Science offers a short explanation in the video below.
Applications for Education
After watching the video to learn why we crave sugar, have students take a look at their personal sugar consumption habits. Sugar Stacks is a good website for understanding how much sugar is in the food and beverages that we consume. Sugar Stacks lists popular food and beverage items in ten categories. Every item is pictured with a stack of sugar cubes. Each sugar cube represents four grams of sugar. This is a great way to see just how much sugar you really consume in your favorite snack or beverage.
H/T to the Pearson OLE blog.