What happens within the first hour of drinking a cola?

10 minutes: 10 teaspoons of sugar hit your system, which is 100 percent of your recommended daily intake. You'd normally vomit from such an intake, but the phosphoric acid cuts the flavor.

Photo: Image and text taken from Organic Consumers Association

20 minutes: Your blood sugar skyrockets. Your liver attempts to maximize insulin production in order to turn high levels of sugar into fat.

40 minutes: As your body finishes absorbing the caffeine, your pupils dilate, your blood pressure rises, and your liver pumps more sugar into the bloodstream.

45 minutes: Your body increases dopamine production, tricking you into feeling pleasure and adding to the addictiveness of the beverage.

60 minutes: The sugar crash begins.

Source: Dr. Mercola: http://www.organicconsumers.org/articles/article_9665.cfm