So now days everything inside monster or any other energy drink is considered a poison? If so then I should say same to coffee, soft drinks, and many other because they have chemicals which your body needs. It has sugar in it (your body needs that), there's Vitamin B in it and probably few others.. Including Water..
My school teacher used to say same thing without her knowing what it is and what she drinks is actual poison too, everything we actually eat, drink is poison to your body eventually, no matter if its good or not, call me ignorant but its true.
Edit: Its addicting just like coffee, candy, salt food, smoking, drugs and many other shit.