How GABA and Glutamate Control Your Brain and Stress Response: Imbalances, Symptoms, and Modulation

This podcast episode, hosted by Dr. Donal Snipes, provides an in-depth analysis of the critical roles of GABA and glutamate, the brain's primary inhibitory and excitatory neurotransmitters, respectively. It emphasizes that these two neurochemicals are fundamental to regulating the central nervous system, stress response, and overall mental and physical well-being. The discussion highlights the 'Goldilocks principle,' asserting that optimal brain function relies on just the right balance of these neurotransmitters, as both deficiencies and excesses can lead to a cascade of adverse symptoms. The episode also underscores the interconnectedness of the entire neurochemical system, explaining that altering one neurotransmitter, such as GABA or glutamate, inevitably impacts all others, including serotonin, norepinephrine, dopamine, and various hormones like cortisol and thyroid hormones.

The presentation delves into the multifaceted causes of neurotransmitter imbalances, moving beyond simple excess or deficiency of a single chemical. It explores how issues like insufficient nutrients, gut inflammation, impaired gut microbiome function, faulty genes, low vagal tone, and glucocorticoid resistance can all disrupt the delicate balance of GABA and glutamate. A key distinction made is that while GABA is inhibitory in the mature brain, it was once mistakenly thought to be excitatory in the embryonic brain, a belief since dispelled by recent research. The episode also clarifies that clinical diagnosis of specific neurotransmitter imbalances in the brain is currently not feasible, making symptom-based assessment and holistic approaches crucial. It cautions against self-diagnosing or self-medicating, especially with supplements, due to the complex interplay of neurochemicals and potential for unintended side effects.

Practical insights and recommendations focus on holistic strategies for modulating GABA and glutamate levels. Dietary interventions are heavily emphasized, with specific recommendations for foods that can naturally increase GABA, such as fermented foods (kefir, yogurt, tempeh), whole grains, oats, various beans, nuts, and certain vegetables and fruits. The role of the gut-brain axis is highlighted, explaining how beneficial gut bacteria can produce GABA that influences brain function. Essential oils, particularly those known for calming properties like lavender and bergamot, are suggested for inhalation to stimulate brain receptors. The episode also provides critical warnings about the potential dangers of artificially increasing GABA through supplements, which can paradoxically trigger depressive episodes, and the importance of consulting a doctor before combining supplements with prescribed medications.

Broader implications of GABA and glutamate dysregulation extend to a wide range of health conditions. Chronic stress and excessive glutamate can lead to neurotoxicity, systemic inflammation, and ultimately depression due to glucocorticoid resistance. Low GABA is linked to impaired deep sleep, difficulty concentrating, memory problems, muscle pain, headaches, and even characteristics similar to bipolar disorder. The discussion also touches upon the impact of various medications—including hypertension drugs, statins, Gabapentin, benzodiazepines, antihistamines, and amphetamines—on GABA and glutamate levels, stressing the importance of considering drug interactions and advocating for oneself in medical consultations. The episode concludes by emphasizing that while neurogenesis and nervous system healing take significant time (18-24 months for full recovery), early improvements are possible through consistent, holistic interventions.

"you can't alter Gaba or glutamate without affecting the entire system"

"it is not we are not able to test the neurotransmitters in your brain"

"Gaba is your calming and glutamate is your exciting"

"too much glutamate can stimulate the stress response and prevent Gaba release"

"when the neurons are exposed to Too Much glutamate for too long it kills them it becomes neurotoxic"

"artificially increasing Gaba May trigger a depressive episode"

"low Gaba levels are associated with 65% of the normal amount of non-rem or deep sleep"

"The beneficial gut B bacteria in these foods can make Gaba in the gut which then travels via the gut brain axis up to the brain"