Gaba the amini acid sold in stores DOES NOT CROSS THE BLOOD BRAIN BARRIER, so please dont wate your money as its also expensive.
Some supplments to do,are
Picamilion - a supplment that attacthes to nicacin as its carrier and does cross the BRAIN and raises gaba.
I tried this. It's also expensive and I didn't notice even a slight difference in anything.
L Theanine - Also crosses the brain and is said to raise both gaba and dopamine
This has a nice effect if you drink tea. The pills are useless.