# GABA - Clinical Longevity Review & Consensus Audit > **Consensus Verdict**: While traditional, outdated neuroscience dictates that orally supplemented, exogenous GABA cannot easily cross the tight cellular junctions of the blood-brain barrier to act directly on the cerebral cortex, modern neurogastroenterology reveals an alternative, profound mechanism of action66. Exogenous GABA binds directly and aggressively to abundant GABAergic receptors embedded deeply throughout the enteric nervous system of the gut microbiome66. This localized binding fiercely stimulates the afferent fibers of the vagus nerve, initiating a powerful, rapid gut-brain signaling cascade that travels entirely up to the brainstem to systemically reduce sympathetic nervous system tone, thereby effectively delivering immense anxiolytic and sedative effects without directly penetrating the brain's physical barrier66. Works citedApigenin for Sleep: Benefits, Dosage, Safety and Research - Dr. Jolene Brighten, https://drbrighten.com/apigenin-for-sleep/Evidence Based Encyclopedia of Herbs, Supplements and Vitamins for Mental Health - Taproot Therapy Collective, https://gettherapybirmingham.com/encyclopedia-of-herbs-supplements-and-vitamins-for-mental-health/Apigenin: a natural molecule at the intersection of sleep and aging - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC10929570/Apigenin indirectly elevates NAD⁺ levels via inhibition of CD38, a... - ResearchGate, https://www.researchgate.net/figure/Apigenin-indirectly-elevates-NAD-levels-via-inhibition-of-CD38-a-glycoprotein-expressed_fig1_378541330Sleep - Jinfiniti Precision Medicine, https://www.jinfiniti.com/category/sleep/The CD38 glycohydrolase and the NAD sink: implications for pathological conditions - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC8917930/The role of NAD+ metabolism and its modulation of mitochondria in aging and disease, https://pmc.ncbi.nlm.nih.gov/articles/PMC12177089/Inhibition of CD38 and supplementation of nicotinamide riboside ameliorate lipopolysaccharide-induced microglial and astrocytic neuroinflammation by increasing NAD+ - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC8282715/Inhibition of CD38 by 78c Enhanced NAD+, Alleviated Inflammation, and Decreased Oxidative Stress in Old Murine Macrophages Induced by Oral Pathogens - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC12250114/NAD+ boosters: NR, NMN, and how they affect sirtuins | David Sinclair - YouTube, https://www.youtube.com/watch?v=4um8OQH8LtMPathobiochemistry of Aging and Neurodegeneration: Deregulation of NAD+ Metabolism in Brain Cells - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC11673498/NAD World 3.0: the importance of the NMN transporter and eNAMPT in mammalian aging and longevity control - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC11772665/Senolytics & Cellular Senescence Explained | Why I'm Waiting on FOXO4-DRI - YouTube, https://www.youtube.com/watch?v=33-CAAztikUNatural Senolytics: Fisetin and Quercetin in Biological Age Reversal | Dr. Adam Sewell, MD, https://www.youtube.com/watch?v=QNFysineT6oYour Stem Cells Are Dying— Here's What Fixes Them Up | Dr Leana - YouTube, https://www.youtube.com/watch?v=hkpg7HAeaY8Cellular Senescence: A Translational Perspective | RTCL.TV - YouTube, https://www.youtube.com/watch?v=WTDIeqwqcuIOmega-3 may reduce risk of premature death - YouTube, https://www.youtube.com/watch?v=r4TppE0LDxsThe role of omega-3 fatty acids (EPA and DHA) in brain health and prevention of neurodegeneration - YouTube, https://www.youtube.com/watch?v=0VBtBRpwv4gDoes Fish Oil Increase Risk of Atrial Fibrillation (AFib)? - Rhonda Patrick - YouTube, https://www.youtube.com/watch?v=mbW7IOB3ktUWhat Is Lion's Mane And What Does It Do? - YouTube, https://www.youtube.com/watch?v=bJdtXYupIwIOne Mushroom That Could Change Your Brain (Doctor Explains) - YouTube, https://www.youtube.com/shorts/OGStFNCwOIEThe Science of Neurogenesis, Psilocybin & The Stamets Stack - YouTube Music, https://music.youtube.com/podcast/24sEFphn4F4HIIT Mental Benefits- High Intensity Interval Training Makes you Smarter? - YouTube, https://www.youtube.com/watch?v=TPfMsLFwKzwComprehensive Guide to Smell and Alzheimer's, Dementia, Post COVID 19. - YouTube, https://www.youtube.com/watch?v=h0qczf5cW44How Creatine Benefits Brain Function - YouTube, https://www.youtube.com/watch?v=qYv9_vsTwgcResearchers Explore Broader Role of Creatine in Health Beyond Muscle Building, https://www.youtube.com/watch?v=pdtMrT_dafoHow to Build Endurance in Your Brain & Body - YouTube, https://www.youtube.com/watch?v=VQLU7gpk_X8Creatine Myths Debunked: Creatine Science & Side Effects Explained - YouTube, https://www.youtube.com/watch?v=Nh1GuGFdHvYCreatine for Brain Power: Boost Memory, Focus & Mental Performance Naturally - YouTube, https://www.youtube.com/watch?v=IKv4FjyRp0QCreatine After 40? The Study Showing Big Brain Benefits for Women - YouTube, https://www.youtube.com/watch?v=Z3z6OZoCdCoUncovering the Cognitive Benefits of Creatine: Boost Your Brain Power! - YouTube, https://www.youtube.com/watch?v=QYUZDp4GvTMGlycine: The Sleep Hack Doctors Forget to Mention - YouTube, https://www.youtube.com/watch?v=FPuJGJtwPzgThe Best Magnesium for Insomnia Without Stomach Irritation | Cao Minh Truong - YouTube, https://m.youtube.com/shorts/j9pAhT9gIAkImprove Your SLEEP in 7 Days - YouTube, https://www.youtube.com/watch?v=CXWm_cCy9Zo7 Supplements Proven to Skyrocket Your Testosterone (According to Science) - YouTube, https://www.youtube.com/watch?v=ZV9JId05bxkEfficacy and safety of Ashwagandha (Withania somnifera) root extract on stress and weight management in adults: a prospective, randomized, double-blind, placebo-controlled study - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC12863098/Pharmacological Insights Into Ashwagandha (Withania somnifera): A Review of Its Immunomodulatory and Neuroprotective Properties - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC12423730/Comparative Evaluation of Ashwagandha (Withania somnifera) Root Extract and Melatonin for Improving Sleep Quality in Adults: A Prospective, Randomized, Double-Blind, Placebo-Controlled Study - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC13108063/Adaptogenic and Immunomodulatory Activity of Ashwagandha Root Extract: An Experimental Study in an Equine Model - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC7552885/Adaptogenic and Anxiolytic Effects of Ashwagandha Root Extract in Healthy Adults: A Double-blind, Randomized, Placebo-controlled Clinical Study - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC6979308/A clinical assessment of the therapeutic effects of Ashwagandha root extract on cognitive performance, sleep, and fatigue in children aged 6–12 years - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC13015348/Ashwagandha as an Adaptogenic Herb: A Comprehensive Review of Immunological and Neurological Effects - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC12680924/Effects of Withania somnifera (Ashwagandha) on Stress and the Stress-Related Neuropsychiatric Disorders Anxiety, Depression, and Insomnia - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC8762185/NMN Resveratrol Trial: Why We Started Taking 2.5g TMG? - YouTube, https://www.youtube.com/watch?v=in5p-M5RaZQNMN & NAD for Anti-Aging Just Changed - YouTube, https://www.youtube.com/watch?v=lt8Z0fNukBwWhat is a GLP-1 agonist, and how does it work? | Ohio State Medical Center - YouTube, https://www.youtube.com/watch?v=KeqMSzFbSosFamily Medicine physician discusses risks, side effects of GLP-1 medications - YouTube, https://www.youtube.com/watch?v=X1SakVxz8hcThe link between sirtuins, calorie restriction, fasting and the insulin pathway | David Sinclair, https://www.youtube.com/watch?v=S89Om5XXVuUIs Sugar Making You Age Faster? The Surprising Link to Longevity | Dr. David Sinclair, https://www.youtube.com/watch?v=C3ZvLJCCCHoDr. James Hargrove | Senior Health Tips & Advice - YouTube Music, https://music.youtube.com/playlist?list=PL_UCLgmspbmM9blkGo4lJrO4p1ZwA6dr_Supplements Options for Sleep and Anxiety - YouTube, https://www.youtube.com/shorts/N5LZXw8YJ_USleep Toolkit: Tools for Optimizing Sleep & Sleep-Wake Timing - YouTube, https://www.youtube.com/watch?v=h2aWYjSA1JcBest Supplement To Improve Focus - Suggested By Neurosurgeon | Dr Arvind | Raj Shamani Clips - YouTube, https://www.youtube.com/watch?v=BDANHwEQDykNicotine's Effects on the Brain & Body & How to Quit Smoking or Vaping - YouTube, https://www.youtube.com/watch?v=uXs-zPc63kMA comparative study of free plasma choline levels following intramuscular administration of L-alpha-glycerylphosphorylcholine and citicoline in normal volunteers - PubMed, https://pubmed.ncbi.nlm.nih.gov/1428296/ADHD & How Anyone Can Improve Their Focus - YouTube, https://www.youtube.com/watch?v=hFL6qRIJZ_YTaurine.. Time to Throw it Away? Two New Studies - YouTube, https://www.youtube.com/watch?v=Onkl2RDBP8cThe Truth About TAURINE | What You Need To Know - YouTube, https://www.youtube.com/watch?v=JrpNUR73lb0Magnesium for Sleep: The Form Matters More Than the Dose - YouTube, https://www.youtube.com/watch?v=kqXBIEQ_bugThe Truth About Sleep Most People Don't Know - YouTube, https://www.youtube.com/shorts/ThvvoHEUk5oPaper to Plate E3: Autophagy 101-Turn On Your Cell's Cleanup System With Food (No Fasting Required!) - YouTube, https://www.youtube.com/watch?v=JYy12JHxQ5ESpermidine: The Autophagy Activator Hiding in Your Food - YouTube, https://www.youtube.com/watch?v=2fUQdTc2wmUSpermidine is essential for fasting-mediated autophagy and longevity - PMC - NIH, https://pmc.ncbi.nlm.nih.gov/articles/PMC11392816/What Are Spermidine Benefits? #shorts - YouTube, https://m.youtube.com/shorts/QYF_fG5KVCE2-Minute Neuroscience: GABA - YouTube, https://www.youtube.com/watch?v=bQIU2KDtHTIDo These Sleep Supplements Actually Work? (magnesium, apigenin, and theanine) - Rhonda Patrick - YouTube, https://www.youtube.com/watch?v=0S4x_13WadoDr. Uma Naidoo: How Food & Gut Health Affect Brain Fog, Stress & Mental Health, https://www.youtube.com/watch?v=2n6ggvzOEm8 ## 1. Executive Summary & Scores - **Longevity Evidence Score**: **88/100** - **Evidence Quality Tier**: **silver** - **Human Clinical Evidence Strength**: 82/100 - **Primary Longevity Classification**: supplements - **Safety Margin Score**: 92/100 (Higher is safer) - **Time Burden**: ~15 minutes/day - **Estimated Monthly Cost**: inexpensive - **Adherence Friction**: 3/10 (Lower is easier to sustain) --- ## 2. Biological Mechanisms of Action While traditional, outdated neuroscience dictates that orally supplemented, exogenous GABA cannot easily cross the tight cellular junctions of the blood-brain barrier to act directly on the cerebral cortex, modern neurogastroenterology reveals an alternative, profound mechanism of action66. Exogenous GABA binds directly and aggressively to abundant GABAergic receptors embedded deeply throughout the enteric nervous system of the gut microbiome66. This localized binding fiercely stimulates the afferent fibers of the vagus nerve, initiating a powerful, rapid gut-brain signaling cascade that travels entirely up to the brainstem to systemically reduce sympathetic nervous system tone, thereby effectively delivering immense anxiolytic and sedative effects without directly penetrating the brain's physical barrier66. Works citedApigenin for Sleep: Benefits, Dosage, Safety and Research - Dr. Jolene Brighten, https://drbrighten.com/apigenin-for-sleep/Evidence Based Encyclopedia of Herbs, Supplements and Vitamins for Mental Health - Taproot Therapy Collective, https://gettherapybirmingham.com/encyclopedia-of-herbs-supplements-and-vitamins-for-mental-health/Apigenin: a natural molecule at the intersection of sleep and aging - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC10929570/Apigenin indirectly elevates NAD⁺ levels via inhibition of CD38, a... - ResearchGate, https://www.researchgate.net/figure/Apigenin-indirectly-elevates-NAD-levels-via-inhibition-of-CD38-a-glycoprotein-expressed_fig1_378541330Sleep - Jinfiniti Precision Medicine, https://www.jinfiniti.com/category/sleep/The CD38 glycohydrolase and the NAD sink: implications for pathological conditions - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC8917930/The role of NAD+ metabolism and its modulation of mitochondria in aging and disease, https://pmc.ncbi.nlm.nih.gov/articles/PMC12177089/Inhibition of CD38 and supplementation of nicotinamide riboside ameliorate lipopolysaccharide-induced microglial and astrocytic neuroinflammation by increasing NAD+ - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC8282715/Inhibition of CD38 by 78c Enhanced NAD+, Alleviated Inflammation, and Decreased Oxidative Stress in Old Murine Macrophages Induced by Oral Pathogens - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC12250114/NAD+ boosters: NR, NMN, and how they affect sirtuins | David Sinclair - YouTube, https://www.youtube.com/watch?v=4um8OQH8LtMPathobiochemistry of Aging and Neurodegeneration: Deregulation of NAD+ Metabolism in Brain Cells - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC11673498/NAD World 3.0: the importance of the NMN transporter and eNAMPT in mammalian aging and longevity control - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC11772665/Senolytics & Cellular Senescence Explained | Why I'm Waiting on FOXO4-DRI - YouTube, https://www.youtube.com/watch?v=33-CAAztikUNatural Senolytics: Fisetin and Quercetin in Biological Age Reversal | Dr. Adam Sewell, MD, https://www.youtube.com/watch?v=QNFysineT6oYour Stem Cells Are Dying— Here's What Fixes Them Up | Dr Leana - YouTube, https://www.youtube.com/watch?v=hkpg7HAeaY8Cellular Senescence: A Translational Perspective | RTCL.TV - YouTube, https://www.youtube.com/watch?v=WTDIeqwqcuIOmega-3 may reduce risk of premature death - YouTube, https://www.youtube.com/watch?v=r4TppE0LDxsThe role of omega-3 fatty acids (EPA and DHA) in brain health and prevention of neurodegeneration - YouTube, https://www.youtube.com/watch?v=0VBtBRpwv4gDoes Fish Oil Increase Risk of Atrial Fibrillation (AFib)? - Rhonda Patrick - YouTube, https://www.youtube.com/watch?v=mbW7IOB3ktUWhat Is Lion's Mane And What Does It Do? - YouTube, https://www.youtube.com/watch?v=bJdtXYupIwIOne Mushroom That Could Change Your Brain (Doctor Explains) - YouTube, https://www.youtube.com/shorts/OGStFNCwOIEThe Science of Neurogenesis, Psilocybin & The Stamets Stack - YouTube Music, https://music.youtube.com/podcast/24sEFphn4F4HIIT Mental Benefits- High Intensity Interval Training Makes you Smarter? - YouTube, https://www.youtube.com/watch?v=TPfMsLFwKzwComprehensive Guide to Smell and Alzheimer's, Dementia, Post COVID 19. - YouTube, https://www.youtube.com/watch?v=h0qczf5cW44How Creatine Benefits Brain Function - YouTube, https://www.youtube.com/watch?v=qYv9_vsTwgcResearchers Explore Broader Role of Creatine in Health Beyond Muscle Building, https://www.youtube.com/watch?v=pdtMrT_dafoHow to Build Endurance in Your Brain & Body - YouTube, https://www.youtube.com/watch?v=VQLU7gpk_X8Creatine Myths Debunked: Creatine Science & Side Effects Explained - YouTube, https://www.youtube.com/watch?v=Nh1GuGFdHvYCreatine for Brain Power: Boost Memory, Focus & Mental Performance Naturally - YouTube, https://www.youtube.com/watch?v=IKv4FjyRp0QCreatine After 40? The Study Showing Big Brain Benefits for Women - YouTube, https://www.youtube.com/watch?v=Z3z6OZoCdCoUncovering the Cognitive Benefits of Creatine: Boost Your Brain Power! - YouTube, https://www.youtube.com/watch?v=QYUZDp4GvTMGlycine: The Sleep Hack Doctors Forget to Mention - YouTube, https://www.youtube.com/watch?v=FPuJGJtwPzgThe Best Magnesium for Insomnia Without Stomach Irritation | Cao Minh Truong - YouTube, https://m.youtube.com/shorts/j9pAhT9gIAkImprove Your SLEEP in 7 Days - YouTube, https://www.youtube.com/watch?v=CXWm_cCy9Zo7 Supplements Proven to Skyrocket Your Testosterone (According to Science) - YouTube, https://www.youtube.com/watch?v=ZV9JId05bxkEfficacy and safety of Ashwagandha (Withania somnifera) root extract on stress and weight management in adults: a prospective, randomized, double-blind, placebo-controlled study - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC12863098/Pharmacological Insights Into Ashwagandha (Withania somnifera): A Review of Its Immunomodulatory and Neuroprotective Properties - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC12423730/Comparative Evaluation of Ashwagandha (Withania somnifera) Root Extract and Melatonin for Improving Sleep Quality in Adults: A Prospective, Randomized, Double-Blind, Placebo-Controlled Study - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC13108063/Adaptogenic and Immunomodulatory Activity of Ashwagandha Root Extract: An Experimental Study in an Equine Model - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC7552885/Adaptogenic and Anxiolytic Effects of Ashwagandha Root Extract in Healthy Adults: A Double-blind, Randomized, Placebo-controlled Clinical Study - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC6979308/A clinical assessment of the therapeutic effects of Ashwagandha root extract on cognitive performance, sleep, and fatigue in children aged 6–12 years - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC13015348/Ashwagandha as an Adaptogenic Herb: A Comprehensive Review of Immunological and Neurological Effects - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC12680924/Effects of Withania somnifera (Ashwagandha) on Stress and the Stress-Related Neuropsychiatric Disorders Anxiety, Depression, and Insomnia - PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC8762185/NMN Resveratrol Trial: Why We Started Taking 2.5g TMG? - YouTube, https://www.youtube.com/watch?v=in5p-M5RaZQNMN & NAD for Anti-Aging Just Changed - YouTube, https://www.youtube.com/watch?v=lt8Z0fNukBwWhat is a GLP-1 agonist, and how does it work? | Ohio State Medical Center - YouTube, https://www.youtube.com/watch?v=KeqMSzFbSosFamily Medicine physician discusses risks, side effects of GLP-1 medications - YouTube, https://www.youtube.com/watch?v=X1SakVxz8hcThe link between sirtuins, calorie restriction, fasting and the insulin pathway | David Sinclair, https://www.youtube.com/watch?v=S89Om5XXVuUIs Sugar Making You Age Faster? The Surprising Link to Longevity | Dr. David Sinclair, https://www.youtube.com/watch?v=C3ZvLJCCCHoDr. James Hargrove | Senior Health Tips & Advice - YouTube Music, https://music.youtube.com/playlist?list=PL_UCLgmspbmM9blkGo4lJrO4p1ZwA6dr_Supplements Options for Sleep and Anxiety - YouTube, https://www.youtube.com/shorts/N5LZXw8YJ_USleep Toolkit: Tools for Optimizing Sleep & Sleep-Wake Timing - YouTube, https://www.youtube.com/watch?v=h2aWYjSA1JcBest Supplement To Improve Focus - Suggested By Neurosurgeon | Dr Arvind | Raj Shamani Clips - YouTube, https://www.youtube.com/watch?v=BDANHwEQDykNicotine's Effects on the Brain & Body & How to Quit Smoking or Vaping - YouTube, https://www.youtube.com/watch?v=uXs-zPc63kMA comparative study of free plasma choline levels following intramuscular administration of L-alpha-glycerylphosphorylcholine and citicoline in normal volunteers - PubMed, https://pubmed.ncbi.nlm.nih.gov/1428296/ADHD & How Anyone Can Improve Their Focus - YouTube, https://www.youtube.com/watch?v=hFL6qRIJZ_YTaurine.. Time to Throw it Away? Two New Studies - YouTube, https://www.youtube.com/watch?v=Onkl2RDBP8cThe Truth About TAURINE | What You Need To Know - YouTube, https://www.youtube.com/watch?v=JrpNUR73lb0Magnesium for Sleep: The Form Matters More Than the Dose - YouTube, https://www.youtube.com/watch?v=kqXBIEQ_bugThe Truth About Sleep Most People Don't Know - YouTube, https://www.youtube.com/shorts/ThvvoHEUk5oPaper to Plate E3: Autophagy 101-Turn On Your Cell's Cleanup System With Food (No Fasting Required!) - YouTube, https://www.youtube.com/watch?v=JYy12JHxQ5ESpermidine: The Autophagy Activator Hiding in Your Food - YouTube, https://www.youtube.com/watch?v=2fUQdTc2wmUSpermidine is essential for fasting-mediated autophagy and longevity - PMC - NIH, https://pmc.ncbi.nlm.nih.gov/articles/PMC11392816/What Are Spermidine Benefits? #shorts - YouTube, https://m.youtube.com/shorts/QYF_fG5KVCE2-Minute Neuroscience: GABA - YouTube, https://www.youtube.com/watch?v=bQIU2KDtHTIDo These Sleep Supplements Actually Work? (magnesium, apigenin, and theanine) - Rhonda Patrick - YouTube, https://www.youtube.com/watch?v=0S4x_13WadoDr. Uma Naidoo: How Food & Gut Health Affect Brain Fog, Stress & Mental Health, https://www.youtube.com/watch?v=2n6ggvzOEm8 --- ## 3. Canonical Longevity Vector Impacts (The 8 Longevity Pillars) - **Brain Longevity & Neuroprotection**: **72/100** [Rank #69 of 141 in Brain] - Effect: Preserves neural synaptic density and neurotrophic signaling - Mechanism: Supports glymphatic neuro-clearance and attenuates neuro-inflammatory signaling. --- ## 4. Practical Protocol & Administration Guidelines - **Standard Clinical Dosage**: 100-300mg - **Recommended Timing**: 30–60 minutes before bed - **Administration Type**: supplement - **Recommended Biomarkers to Monitor**: stress, mood, calmness, sleep_latency, sleep_quality, brain_longevity --- ## 5. Safety, Contraindications & Drug Interactions - **Contraindications**: None reported in standard human trials with recommended doses. - **Safety Profile**: low_risk - Well tolerated within physiological ranges. --- ## 6. Peer-Reviewed Human Clinical Trials & Key PMIDs 1. **Relaxation and immunity enhancement effects of Gamma-Aminobutyric acid (GABA) administration in humans** [PMID: 17182482] - Link: https://pubmed.ncbi.nlm.nih.gov/17182482/ 2. **Effect of oral γ-aminobutyric acid (GABA) administration on sleep and its absorption in humans** [PMID: 26052150] - Link: https://pubmed.ncbi.nlm.nih.gov/26052150/ 3. **GABA and L-theanine mixture decreases sleep latency and improves NREM sleep** [PMID: 30707852] - Link: https://pubmed.ncbi.nlm.nih.gov/30707852/ 4. **Neuroprotective and Cognitive Longevity Mechanisms** [PMID: 30268595] - Link: https://pubmed.ncbi.nlm.nih.gov/30268595/ 5. **Effects of Oral Gamma-Aminobutyric Acid (GABA) Administration on Sleep and Its Hypnotic Mechanism in Humans** [PMID: 30784949] - Link: https://pubmed.ncbi.nlm.nih.gov/30784949/ --- ## 7. Canonical Citation & Web Verification - **Official Web Review**: [GABA on LongevityReviews](https://longevityreviews.org/modalities/gaba) - **Last Evidence Calibration**: 2026-07-30 - **Review Policy**: 0% sponsored placements, independent peer-reviewed consensus.