Pre-workout, or pre-workout supplement, is a bodybuilding supplement. It contains ingredients that are intended to give a sudden boost of energy. These supplements are over the counter and are used by mainly athletes to help aid in performance and recovery. Pre-workout supplements contain ingredients such as, beta alanine, creatine, amino acids, and L- Citrulline, that aid in muscle recovery after a strenuous workout. This boost is mainly supplied by caffeine. Pre-workout can be beneficial for performing strenuous exercises. Most supplement brands will advertise these products that are not safe or scientifically founded. These supplements being advertised are getting little to no benefits and can cause unwanted side effects.