"Gamma-Aminobutyric acid, or γ-aminobutyric acid, or GABA, is the chief inhibitory neurotransmitter in the developmentally mature mammalian central nervous system. Its principal role is reducing neuronal excitability throughout the nervous system. GABA is sold as a dietary supplement in many countries.
This is used for a number of reasons and has many benefits, and of course use within safe limits.
I would say 3 listens would be a heavy dose.
Be sure to know the advantages and disadvantages of using it."