The downside of making your own meth (other than addiction and various ill effects)? The process is dangerous and leads to an explosion if oxygen is allowed to participate in the reaction.

This article claims that teenagers eat thirty-four teaspoons of added sugar daily, on average. It also has some other interesting information, such as the amount of sugar that “fruit-flavored” yogurt contains: six teaspoons.

And to put this into a unit that actually helps you: one teaspoon of sugar is about 4.2 grams.