Yes, your body will get used to anythjng over time. It's like why some people like foods & others don't. The truth isn't that people don't like a food - it's that they aren't accustomed to it. Once your body gets used to something, especially something that gives you instant energy, it will rely on it. I avoid all energy drinks/shots for this reason. I wouldn't recommend drinking those before workouts, unless you make a homemade alternative which is healthier. Most pre packaged supplements are not very healthy.