Pre-workout supplements are one of the most popular types of supplements, but pre-workouts should provide more than just an energy boost. The best pre-workouts provide your body with the best ingredients out there. This will include an effective mix of amino acids that will help you build more muscle, have more strength, and produce more power. You should also expect the best pre-workouts to not only give you energy but focus as well. You need to be able to focus on the task at hand and a pre-workout supplement that gives you one without the other isn’t going to be very effective. The best pre-workouts also eliminate the vaso-restrictive effects of certain stimulants like caffeine. They allow for increased blood flow, increased oxygen, and increased amino acid intake.