A pre-workout drink is a bodybuilding supplement product used by athletes and weightlifters to enhance athletic performance. It is taken before a workout to increase endurance, energy, and focus during exercise. Pre-workout supplements come in different forms, including tablets, capsules, liquids, powders, and bars. The main ingredient in most pre-workout supplements is caffeine, which is found in 86% of the bestselling pre-workout supplements. Caffeine is a popular ingredient in pre-workout because it increases alertness, mental concentration, and energy. Other common ingredients in pre-workout supplements include creatine, beta-alanine, BCAAs, and electrolytes. These supplements can be good for your health and your workouts, but they can also bring on side effects that you need to be aware of. Some pre-workout products contain ingredients linked to adverse effects, and the FDA warns consumers to be cautious when consuming them. If you are considering taking a pre-workout supplement, it is important to talk to your doctor before doing so, especially if you have any health conditions or take any medicines.