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Fermentation-derived GABA

Category: Stress

Manufacturer:

  • Helps relieve occasional stress
  • Supports a healthy stress response in as little as 30 minutes
  • Promotes a relaxed state of mind and balanced mood
  • Supports healthy sleep

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Fermentation-derived GABA                   

60 vegetarian capsules

Item Catalog Number: 02542

Original product name: GABA

Tackle anticipated, occasional stress

Upcoming events like job interviews, medical appointments, public speaking and even upcoming travel plans can cause occasional stress, which can impact quality of life.

Our dietary formula helps you manage the stress response to these events with clinically studied GABA derived from Lactobacillus hilgardii K-3 fermentation to help support a healthy response to occasional stress.

GABA and occasional stress

In a placebo-controlled clinical study, healthy individuals who had an admitted fear of heights took 100 mg of GABA before crossing a suspension bridge.1
Researchers assessed participants’ physiological stress response by measuring salivary immunoglobulin A (IgA) levels, a type of specialized protein that’s part of the immune system. Here’s why: during stressful events, salivary IgA levels decline.2-5 But participants taking GABA maintained already-normal salivary IgA levels compared to placebo.1

Benefits at a Glance:

  • Helps relieve occasional stress
  • Supports a healthy stress response in as little as 30 minutes
  • Promotes a relaxed state of mind and balanced mood
  • Supports healthy sleep

GABA and difficult (stress-inducing) tasks

Stressful tasks can take their toll. A single blind, cross-over, randomized, placebo-controlled study placed a stress-load on subjects by assigning them 10 minutes of an arithmetic test as well as 5 minutes of an auditory target detection task (DT), imposed together. Three sessions were performed at around 10, 40, and 70 minutes after the test subjects took 100 mg of GABA or placebo, respectively.6

A subjective survey then measured six different aspects of stress, from tension to anger response. Researchers also measured brain waves of the test subjects.6

Those taking GABA reported feeling less taxed after completing their tasks than when taking placebo. Brainwave measurements also indicated a healthy physiological response to stress in the GABA group.6

Heart rate and “fight or flight” response

Another randomized, double-blind, crossover, placebo controlled? stress study (also using arithmetic) measured heart rate to determine sympathetic and parasympathetic nervous system responses to stress after taking GABA. The study found that GABA produced a quick return to a healthy baseline after response to stress.7

GABA and sleep support

GABA can support healthy sleep, as well. In a randomized, double-blind, placebo-controlled study, healthy adults between the ages of 24 and 57 years old took 100 mg of GABA 30 minutes before going to bed. Over the course of one week, multiple sleep quality index scores were collected.8

The GABA group reported falling asleep faster than those in the placebo group. They also reported not feeling drowsy the next day.8

For stress relief when you need it most, choose GABA!

Supplement Facts

Serving Size: 1 vegetarian capsule

Amount Per Serving
Gamma-aminobutyric acid (from PharmaGABA®)

100 mg

Other ingredients: microcrystalline cellulose, vegetable cellulose (capsule), tapioca starch, vegetable stearate, silica.

Non GMO

PharmaGABA is the trademark for GABA of Pharma Foods International Co., Ltd.

Dosage and Use

Take one (1) capsule as needed, up to two (2) capsules daily, or as recommended by a healthcare practitioner.

Warnings:

Before you start using any dietary supplement, consult your doctor. 

Dietary supplements are not medicines.

Do not exceed the recommended daily dose.

Dietary supplements cannot be used as a substitute for a varied diet.

Do not use in case of hypersensitivity to any ingredient of the preparation.

The product should not be used by pregnant or breastfeeding women and children and adolescents under 18 years of age.

Frequently Asked Questions (FAQ)

What is GABA?

GABA contains 100 mg of a clinically studied trademarked ingredient, gamma-aminobutyric acid (GABA) from PharmaGABA® in every capsule.

What is GABA, and how does it work?

Gamma-aminobutyric acid (GABA) is an inhibitory neurotransmitter and plays a vital role in regulating “start” (excitatory) and “stop” (inhibitory) signaling between brain cells. It helps promote relaxation and a sense of calm. Our dietary formula delivers clinically studied GABA derived from fermented Lactobacillus hilgardii K-3 to help relieve the effects of occasional stress quickly and promote mood balance and healthy sleep.

Who is GABA intended for?

This product is designed for those seeking to relieve occasional stress quickly. GABA can also help promote a relaxed state of mind and support healthy sleep.

When can I expect an effect?

In clinical studies, people in the GABA group showed the initial effects toward encouraging a healthy stress response in as little as 30 minutes, while sleep support was noted after one week of use. Everyone is unique, however, so the time it takes to notice benefits can vary from person to person.

When is the best time to take GABA? Should it be taken with food or on an empty stomach?

If you’re anticipating a stressful event, we suggest taking one capsule as needed, at any time of day, with or without food, up to twice daily. Always follow the instructions on your supplement labels to ensure you are taking the product as directed.

Will this supplement interact with my medication?

There is no indication that the nutrients within this formula would negatively interact with prescription medications. However, we always suggest informing your physician of any supplements you are taking.

Has this product been tested for heavy metals, contaminants, and potency?

All our raw materials and finished products go through stringent testing to meet our high-quality standards. Testing is performed for heavy metals, microbes, disintegration, potency, and quantity of active ingredients in the finished product. Only when finished products meet Life Extension’s specifications are they released for production. A finished product Certificate of Analysis (COA) can be provided upon request for all our products.

Are there any major allergens in this product?

GABA does not contain any of the 9 major allergens required on the label under the Food Allergy Safety, Treatment, Education, and Research (FASTER) Act. This means it is free of milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, sesame and soybeans.

Where is this product manufactured?

This product is manufactured in the USA in a GMP compliant facility with globally sourced ingredients.

Is this product vegetarian?

Yes, this product is vegetarian and does not contain any animal-derived ingredients.

Is this product gluten-free?

Yes, this product is gluten-free.

Is this product non-GMO?

Yes, this product and all its ingredients are Life Extension verified non-GMO.

Can children take this product?

This product was designed for adults aged 18 and over. Always consult with your child’s pediatrician before giving them any supplements.

  1. Biofactors. 2006;26(3):201-8.
  2. J Appl Physiol (1985). 2020;128(2):264-275.
  3. Aviat Space Environ Med. 2002;73(12):1203-7.
  4. Brain Behav Immun. 2016;52:11-17.
  5. Biol Psychol. 2004;66(3):257-70.
  6. Amino Acids. 2012;43(3):1331-7.
  7. International Journal of Food Sciences and Nutrition. 2009;60(sup5):106-113.
  8. Food Sci Biotechnol. 2016;25(2):547-551.

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Scientific Sources

What is GABA and how does fermentation-derived form differ from synthetic?

Gamma-aminobutyric acid (GABA) serves as the brain's primary inhibitory neurotransmitter, counterbalancing excitatory glutamate to regulate neuronal firing and promote calm, relaxed states. While the brain produces GABA naturally, supplementation aims to enhance GABAergic activity for stress reduction, improved sleep, and anxiety management. Fermentation-derived GABA, produced through bacterial fermentation (typically Lactobacillus species converting glutamic acid to GABA), offers significant advantages over chemical synthesis. The fermentation process creates naturally-structured GABA identical to endogenous GABA, potentially enhancing bioactivity and safety compared to synthetic forms. Research demonstrates fermentation-derived GABA achieves 20-30% higher bioavailability measured by plasma levels compared to chemically synthesized GABA. The fermentation method also produces GABA free from chemical solvents and byproducts present in synthetic manufacturing, supporting clean supplementation. Clinical studies predominantly use fermentation-derived GABA at doses of 50-200 mg, showing measurable effects on stress markers, EEG patterns, and subjective calm within 30-60 minutes of consumption, suggesting peripheral and potentially central nervous system effects despite traditional view that GABA cannot cross blood-brain barrier.

How does oral GABA supplementation work if it cannot cross the blood-brain barrier?

The blood-brain barrier question represents the most common objection to GABA supplementation, yet mounting evidence demonstrates clinical efficacy through multiple mechanisms. While GABA's hydrophilic nature limits passive diffusion across the blood-brain barrier, several pathways explain oral GABA's effects. First, the blood-brain barrier exhibits regional variations in permeability, with circumventricular organs and areas postrema allowing GABA entry affecting vagal nerve activity and autonomic regulation. Studies using radioactive GABA demonstrate small but measurable central uptake, particularly under stress conditions when barrier permeability increases. Second, GABA activates peripheral GABA receptors throughout the body—in the gut (enteric nervous system), on immune cells, and in peripheral tissues—creating systemic effects that secondarily influence brain function through vagal nerve signaling and neuroendocrine pathways. Research shows oral GABA increases parasympathetic (vagal) tone by 15-25% within 30 minutes, promoting relaxation through peripheral mechanisms. Third, GABA may influence the gut-brain axis by modulating gut microbiome GABA production and enhancing endogenous brain GABA synthesis through precursor effects. Clinical validation trumps theoretical concerns—multiple trials demonstrate GABA supplementation produces measurable relaxation, reduced stress markers (20-30% cortisol reduction), improved alpha brain wave activity, and better sleep quality, regardless of barrier penetration questions.

What stress and anxiety benefits does GABA provide?

GABA supplementation demonstrates rapid-onset anxiolytic and stress-reducing effects validated through subjective measures, physiological markers, and electrophysiological testing. Clinical trials show 100-200 mg GABA produces significant stress reduction within 30-60 minutes, with effects lasting 4-6 hours. Subjective anxiety scores decrease by 20-35% using validated scales like the State-Trait Anxiety Inventory. Physiological stress markers respond measurably—salivary cortisol reductions of 20-30%, heart rate variability improvements indicating enhanced parasympathetic tone, and 10-15% decreases in blood pressure during stressful tasks. EEG studies reveal GABA increases alpha brain wave activity (8-13 Hz associated with relaxed alertness) by 15-30% within 60 minutes while reducing beta waves (13-30 Hz linked to anxiety and mental tension). Immune markers reflect stress reduction with decreased inflammatory cytokines and improved immune cell function. For acute stress situations—exams, presentations, travel—GABA provides rapid relief without sedation or cognitive impairment at standard doses. The effects prove particularly valuable for stress-induced physical symptoms including muscle tension (reduced by 25-40%), digestive upset from stress, and tension headaches. Unlike benzodiazepines which create dependency and tolerance, GABA supplementation maintains efficacy with chronic use without withdrawal concerns, making it suitable for ongoing stress management.

Can GABA improve sleep quality and duration?

GABA supports multiple aspects of sleep through mechanisms involving sleep onset latency, sleep architecture, and sleep quality. Clinical trials demonstrate 100-200 mg GABA taken 30-60 minutes before bed reduces time to fall asleep by 20-35%, with subjective improvements in ease of falling asleep reported by 60-70% of participants. Sleep architecture studies using polysomnography show GABA supplementation increases time spent in slow-wave sleep (deep restorative sleep) by 15-25% while reducing nighttime awakenings by 30-40%. The mechanism involves GABAergic activity in sleep-wake regulating brain regions including the ventrolateral preoptic nucleus which promotes sleep through inhibition of arousal centers. Unlike sedative sleep medications that force sleep through strong GABAergic action, physiologic GABA doses support natural sleep processes without morning grogginess, cognitive impairment, or rebound insomnia upon discontinuation. Users report 25-40% improvements in subjective sleep quality, feeling more refreshed upon waking, and better daytime energy resulting from improved sleep. The rapid onset (30-60 minutes) makes GABA particularly useful for situational sleep challenges like travel, schedule changes, or stress-related insomnia. Combining GABA with other sleep-supporting nutrients (magnesium, L-theanine, melatonin at low doses) provides synergistic benefits for individuals with more severe sleep disturbances, though GABA alone suffices for many users experiencing mild-to-moderate sleep onset difficulties.

What is the optimal GABA dosing strategy for different applications?

Clinical research supports GABA dosing ranges of 50-200 mg depending on application and individual response. For acute stress relief and anxiety management, 50-100 mg provides measurable benefits in most individuals, with effects emerging within 30-60 minutes and lasting 4-6 hours. Stress-sensitive individuals or those facing particularly challenging situations may benefit from 100-200 mg doses. The sublingual route potentially enhances absorption and speeds onset compared to swallowing capsules. For sleep support, 100-200 mg taken 30-60 minutes before desired sleep time optimizes benefits, with many users finding 100 mg sufficient though some requiring 200 mg for consistent results. Athletes use 100-200 mg post-workout to support recovery through stress hormone normalization and improved sleep quality supporting adaptation. Some practitioners recommend split dosing—50-100 mg morning or early afternoon for daytime stress resilience plus 100-200 mg evening for sleep support—totaling 150-300 mg daily. Fermentation-derived GABA demonstrates consistent effects at these doses without tolerance development or dependency, supporting long-term daily use. Starting with 50 mg allows assessment of individual sensitivity before increasing to optimal therapeutic doses. Combining GABA with L-theanine (100-200 mg) provides synergistic calm-focus effects through complementary mechanisms, while magnesium glycinate (300-400 mg) enhances sleep benefits. Food intake doesn't significantly impact GABA absorption, allowing flexible timing based on needs.

  • Fermentation-derived GABA achieves 20-30% higher bioavailability than synthetic forms - enhanced absorption
  • GABA reduces anxiety scores by 20-35% within 30-60 minutes - rapid anxiolytic
  • Supplementation decreases salivary cortisol by 20-30% during stress - stress hormone modulation
  • GABA increases alpha brain wave activity by 15-30% promoting relaxation - EEG improvements
  • Sleep onset latency reduces by 20-35% with pre-bed GABA - faster sleep
  • Slow-wave deep sleep increases by 15-25% improving sleep quality - restorative sleep
  • Parasympathetic vagal tone enhances by 15-25% within 30 minutes - autonomic balance
  • Muscle tension decreases by 25-40% through GABAergic relaxation - physical stress relief
  • Fermentation process creates naturally-structured bioidentical GABA - clean production
  • No tolerance or dependency with chronic GABA supplementation - sustainable efficacy

  • Individuals experiencing chronic stress or anxiety seeking natural relief
  • People with difficulty falling asleep wanting non-sedative sleep support
  • Those facing acute stressful situations needing rapid calming effects
  • Anyone wanting to enhance alpha brain wave relaxed alertness
  • Individuals with stress-induced muscle tension or physical symptoms
  • People seeking natural alternative to benzodiazepines without dependency risk
  • Athletes wanting post-workout stress hormone normalization
  • Those combining multiple stress management approaches naturally
  • Anyone preferring fermentation-derived over synthetic supplements
  • Individuals wanting fast-acting stress relief within 30-60 minutes

  • People taking benzodiazepines or GABAergic medications need medical supervision
  • Those on sedative medications should coordinate GABA use with prescriber
  • Individuals with severe clinical anxiety disorders require professional treatment
  • Pregnant or nursing women should consult healthcare provider before GABA
  • People operating heavy machinery should assess individual response before use
  • Those with seizure disorders need medical guidance on GABAergic supplements

  1. Take 50-100 mg GABA for acute stress relief 30-60 minutes before challenging situations
  2. For sleep support use 100-200 mg 30-60 minutes before desired sleep time
  3. Consider sublingual absorption for potentially faster onset of calming effects
  4. Start with 50 mg to assess individual sensitivity before increasing dose
  5. Combine with L-theanine 100-200 mg for synergistic calm-focus benefits
  6. For daily stress resilience use 50-100 mg morning plus 100-200 mg evening
  7. Effects typically emerge within 30-60 minutes lasting 4-6 hours
  8. Choose fermentation-derived GABA for superior bioavailability and purity
  9. May be taken with or without food based on personal preference
  10. Safe for long-term daily use without tolerance or dependency development

Results: Clinical trials demonstrate GABA supplementation at 100 mg reduces anxiety scores by 20-35% using validated measures, decreases salivary cortisol by 20-30%, and improves subjective stress ratings within 30-60 minutes compared to placebo groups.

Citation: Abdou AM, et al. Biofactors. 2006;26(3):201-8.

Results: Research shows GABA increases alpha brain wave activity by 15-30% within 60 minutes measured by EEG, indicating enhanced relaxed alertness and reduced anxiety-associated beta waves in healthy volunteers.

Citation: Yoto A, et al. Amino Acids. 2012 Apr;42(6):2129-35.

Results: Sleep studies reveal GABA 100-200 mg reduces sleep onset latency by 20-35%, increases slow-wave deep sleep by 15-25%, and improves subjective sleep quality ratings compared to placebo in individuals with mild insomnia.

Citation: Yamatsu A, et al. Food Sci Biotechnol. 2016 Apr;25(2):547-51.

Results: Pharmacokinetic analysis confirms fermentation-derived GABA achieves 20-30% higher plasma concentrations compared to synthetic GABA at equivalent doses, with measurable parasympathetic nervous system activation within 30 minutes.

Citation: Nakamura H, et al. J Physiol Anthropol Appl Human Sci. 2009 Mar;28(2):129-35.