Brain Health: REZEN includes several natural ingredients that support cognition health, memory, and learning which are called Nootropics.* For example, GABA is an amino acid and neurotransmitter responsible for balancing the excitatory transmitters – in other words, it acts like a “brake” during times of stress.* Other Nootropics in ReZEN are Acetyl L-Carnitine, Ashwagandha, Bacopa Monnieri, L-Theanine, Rhodiola Rosea, and Vitamin B6.*