Kirkland Signature Extra Strength energy Shot is formulated with a system of nutrients and B-Vitamins proven to increase the energy producing capacity of the body, both mentally and physically, without the nervous and jittery feelings associated with other energy shots. This liquid shot contains a proprietary energy blend that is not only formulated to boost energy levels, It also provides a healthy source of many b-vitamins including vitamins B3, B5, B6, B12 and Folic Acid, beneficial amino acids including L-Tyrosine, L-Phenylalanine and taurine, and the brain boosting nutrients Glucuronolactone and N-Acetyl L-Carnitine which have been proven to help enhance mental focus and concentration for hours.