I trued GABA supplements for insomnia. Did not work. I did more research and found that ingesting GABA orally is getting it by the wrong route. It doesn't cross the blood-brain barrier efficiently, so it doesn't get where it needs to be to work well. Over the counter supplements of GABA are a waste of money. In desperation I tried some deep breathing exercises and some vagus nerve exercises. Both eork pretty well.