Dexter Jackson Energizer Pre-workout rocked the pre workout world by delivering INSANE energy without the dreaded crash. Beta-alanine is an amino acid that helps fight muscle fatigue. Taking beta-alanine as a supplement increases its concentration in the body and may improve exercise performance. L-Arginine can improve the sport performance by enhancing protein synthesis and tissue repair. L-arginine is also the precursor of nitric oxide used to increase muscular power, endurance and improvement in blood flow. It could be beneficial for subjects with resistance exercises. L-tyrosine are neurotransmitters influence mood and are tied to feelings of well-being. In addition, they affect your body's ability to react to stress.Specifically, tyrosine helps your body conserve energy, while boosting low norepinephrine levels and monitoring your use of adrenaline.