Directions For C4 Original: Take one serving (1 scoop) of C4® Original, mixed with 6 fl. oz. of water 20-30 minutes before training. During your workout, it is recommended that you drink plenty of water or performance beverage such as Cellucor Alpha Amino® to stay hydrated. Some individuals may experience a harmless tingling sensation, which is attributed to beta alanine. USE ONLY AS DIRECTED.