GABA (gamma-aminobutyric acid) is the brain's primary inhibitory neurotransmitter. Its job is to slow things down — to quiet neural overactivity, reduce anxiety, and promote a calm, grounded mental state. So it makes sense that supplementing with GABA would help with stress and anxiety. But for years, scientists were skeptical of oral GABA supplements because of a key question: can GABA actually cross the blood-brain barrier?
The Blood-Brain Barrier Question
The blood-brain barrier (BBB) is a highly selective membrane that protects the brain from potentially harmful substances circulating in the bloodstream. Early pharmacological research suggested that GABA molecules were too large to cross it efficiently, leading many to conclude that oral GABA supplements were ineffective.
What Newer Research Shows
More recent research has challenged this view. A 2012 study in Amino Acids found that oral GABA produced significant increases in alpha brain wave activity — the same relaxed-focus state associated with meditation — within an hour of consumption. A 2019 study in Frontiers in Neuroscience further demonstrated that GABA supplementation reduced stress markers during a cognitively demanding task.
The current hypothesis is that GABA may work partly through enteric nervous system receptors in the gut, and possibly through a more permeable BBB than originally assumed, particularly under stress conditions when barrier integrity is often reduced.
GABA With Lemon Balm: A Synergistic Combination
One of the most effective ways to boost GABA activity is not just supplementing GABA directly, but also inhibiting the enzymes that break it down. Lemon Balm does exactly this — by inhibiting GABA transaminase, it allows GABA to remain active in the brain longer. This combination is more effective than GABA alone, which is why CALM+COLLECTED includes both.
Who Can Benefit From GABA?
People dealing with anxious overthinking, difficulty switching off mentally after work, stress-related insomnia, or general nervous tension tend to respond well to GABA supplementation. It pairs well with L-theanine and Magnesium Glycinate for a comprehensive calming stack.