What it's normally used for
Depressed and bipolar patients usually have lower levels of GABA in their blood plasma. These low levels then reflect lower brain levels. Both Braverman, Pfeifer and Robert Atkins in their books suggest using GABA to fight depression. The idea is that GABA will bring up plasma levels. Unfortunately this theory is too simplistic and might be dangerous.
Women who get depressed from hormonal changes during their menstrual cycle have lower plasma GABA levels than women whose moods are not affected by menstrual changes. Dr. Atkins suggests that GABA supplementation will lift spirits.
2-4 grams of GABA *might* stimulate insulin production and lower blood sugar levels.
What it does for Lucid Dreaming
GABA (Gamma-Aminobutyric Acid) increases dream frequency, intensity, and dream recall.