How can I get my Mom to let me drink monster energy?

I would STRONGLY suggest you do your homework. Investigate what all is in the drink. Then, I would also research what, if any, health risks are involved. "Taurine" is a main ingredient in energy drinks. Before you try to figure out how to convince your mom, you, yourself just might want to read up on what that is. My guess is after you learn about that, you won't worry so much about trying to persuade your mom, but you'll be thanking her instead! Either way, if you decide to pursue this, as a mother, I advise you to have all of your facts straight, present her with information, and then be mature enough to discuss your facts and her concerns. You just might win her over. But, us moms fear the unfamiliar, and we're too busy to check into every single thing ourselves. So, if my kids came to me with facts to support their argument and presented it in a respectful, educated manner, chances are I would bend!