🧠 What is it?

GABA (gamma-aminobutyric acid) is a naturally occurring neurotransmitter that inhibits overactive brain signals, promoting calmness and relaxation.

How does it work for medicinal purposes?

• Enhances parasympathetic nervous system activity, lowering stress.
• Promotes alpha brain waves, linked to relaxation.
• Supports blood pressure regulation through calming effects.

Active ingredient

• GABA itself (endogenous neurotransmitter)

Forms

• Capsules, tablets, powders
• Functional beverages with added GABA

Imbalance or deficiency

• Low GABA levels are linked to anxiety, stress, insomnia, and some mood disorders.

First medicinal use

Isolated as a neurotransmitter in the 1950s, studied as a supplement in Japan (1990s).

Conditions it helps (studies show)

1. Anxiety (both, more reported in women) – Reduces acute stress.
2. Insomnia (both) – Improves sleep onset and quality.
3. Stress response (both) – Lowers cortisol and heart rate.
4. High blood pressure (men & women with mild hypertension) – Slight reductions in BP.
5. Mood disorders (both) – Supports calm mood.

Conditions it helps prevent

• Stress-related insomnia
• Chronic high cortisol levels
• Hypertension (mild cases)

Foods rich in it

• Fermented foods (kimchi, miso, tempeh)
• Brown rice germ
• Spinach
• Sprouted grains

Possible side effects

• Mild drowsiness (5–10%)
• Tingling sensations (<5%)
• Rare GI upset

Dosage

• 100–200 mg daily (supplement)

Time to work

• Stress/anxiety: 30–60 min
• Sleep: 3–7 days

Best time

• Evening (for sleep)
• 30–60 minutes before stressful events

With or without food?

Best taken without food for faster absorption.