Gamma Aminobutyric Acid (GABA) is a chemical the brain uses to calm nerve signals. As a supplement, people take it to feel more relaxed and settled.
Many reach for GABA before bed to quiet a racing mind or during the day to take the edge off stress. Some try it for sharper focus or to bounce back after tough workouts. Human research on these extra benefits, however, falls short.
Capsules and powders are the usual forms. Taking it on an empty stomach about 30 minutes before sleep is common. Certain products pair GABA with other ingredients to boost absorption, but how well plain GABA crosses into the brain remains a topic of debate.
Drowsiness is the main side effect. Do not mix it with alcohol, sedatives, or any medication that slows the nervous system. Skip it if you are pregnant or nursing, and check with a doctor if you take daily prescriptions.