Gamma-aminobutyric acid, or GABA, lowers anxiety, increases relaxation and enhances immunity in individuals under stress, reports the National Center for Biotechnology Information. When combined with other ingredients, GABA lowers blood pressure in people with hypertension, according to WebMD, and may be helpful for treating motion sickness in some people.
In a study cited by the National Center for Biotechnology Information, electroencephalograms showed that GABA significantly increased alpha waves and decreased beta waves in participants within one hour of ingestion, promoting relaxation and lowering anxiety. A second study administered GABA to individuals with a fear of heights and measured immunoglobulin A saliva levels as they crossed a suspended bridge. Researchers found that GABA acted as an effective natural relaxant, anxiety reducer and immunity enhancer in individuals experiencing stressful conditions.
GABA is possibly effective for treating the cold sweats and pale skin of motion sickness and may help slow the development of the condition in some individuals, states WebMD. GABA is a chemical produced in the brain that blocks neurotransmissions. Although GABA is probably safe when used for periods of three months or less, the optimal dose depends on several factors, including the user’s overall health and age. As of 2015, there is not enough scientific data to establish a suggested dosage range. Due to lack of sufficient evidence, pregnant and nursing women should avoid the use of GABA.