Pre-workout is a generic term for a range of bodybuilding supplement products used by athletes and weightlifters to enhance athletic performance.[1] Supplements are taken to increase endurance, energy, and focus during a workout.[1] Pre-workout supplements contain a variety of ingredients such as caffeine and creatine, differing by capsule or powder products.[2][3] The first pre-workout product entered the market in 1982, and since then the category has grown in use.[4] Some pre-workout products contain ingredients linked to adverse effects.[2] Although these products are not regulated, the Food and Drug Administration (FDA) warns consumers to be cautious when consuming them.[5]