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Dietary supplement

GABA 500 mg Unflavored Ingredients & Drug Interactions

by Nutricost

GABA 500 mg Unflavored label
See full label image
Powder Category: Non-nutrient/non-botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 9, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking GABA 500 mg Unflavored against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Moderate

GABA 500 mg Unflavored is a dietary supplement by Nutricost with 1 active ingredient. Its ingredients are commonly taken for anxiety and stress, sleep problems, relaxation.Based on those ingredients, 419 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are GABA. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

Jump to a section

Check Your Meds Against GABA 500 mg Unflavored by Nutricost

Ask about any prescription or over-the-counter medication and we check it for interactions with GABA 500 mg Unflavored by Nutricost — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of GABA 500 mg Unflavored by Nutricost

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Jul 30, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

This powder contains one active ingredient: GABA (gamma-aminobutyric acid), a compound your brain naturally produces to help calm nerve activity. Each serving delivers 500 mg.

There are no other active ingredients, and no inactive fillers are listed.

Does it work?

Couldn't assess
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Not assessable

This is a single-ingredient Gamma-aminobutyric Acid (gaba) product and its label doesn't state a use — see Gamma-aminobutyric Acid (gaba)'s own graded uses on its monograph.

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.

The evidence we hold doesn't establish that GABA supplements work for any of the conditions studied — anxiety, ADHD, chronic bronchitis, cerebral palsy, or athletic performance. All carry a rating of insufficient reliable evidence.

That doesn't mean it doesn't work; it means the research isn't yet strong enough to say either way.

The evidence, ingredient by ingredient Gamma-aminobutyric Acid (gaba)

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

GABA is generally well tolerated when taken by mouth in the short term, though long-term safety hasn't been well studied. The most common side effects reported in trials were drowsiness, upset stomach, mild throat burning, muscle weakness, and nausea.

The safety data advises against use during breastfeeding, and there isn't enough information to know whether it's safe in pregnancy — talk with your doctor or pharmacist for personalized guidance if you're pregnant or nursing.

Side effects, ingredient by ingredient Gamma-aminobutyric Acid (gaba)

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Gamma-aminobutyric Acid (gaba).
  • The most serious interaction on file is rated Moderate.
  • For scale: 419 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

Check with your doctor or pharmacist before combining this product with blood pressure–lowering medications — GABA may lower your pressure further and cause dizziness or weakness. Also double-check any central nervous system depressants (sleep aids, benzodiazepines, prescription pain relievers, sedating antihistamines) because additive drowsiness is possible, even if the actual risk is unclear.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no assessable stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

Nutricost GABA 500 mg is a single-ingredient powder that may appeal to you if you're exploring GABA supplementation — but the evidence supporting its use for anxiety, focus, sleep, or athletic performance isn't yet there. Before you start, check your blood pressure medications and any sedating drugs (sleep aids, anxiety meds, pain relievers) with your own doctor or pharmacist, since GABA can amplify their effects.

If you're pregnant or breastfeeding, get personalized advice before taking it.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Jul 21, 2022.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about GABA 500 mg Unflavored, straight from the product label.

Brand Nutricost
Barcode (UPC) 702669931007
Net contents 500 Gram(s); 1.1 lbs
Market status On market
Date entered into DSLD Jul 21, 2022
DSLD ID 269433
Product type Non-nutrient/non-botanical
Supplement form Powder
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Gluten Free
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for GABA 500 mg Unflavored by Nutricost, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
1 Scoop(s)
Maximum serving Sizes:
2 Scoop(s)
Servings per container
1000
UPC/BARCODE
702669931007
IngredientAmount% DV
GABA500 mg--

Other ingredients: None

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Precautions

(Please read the entire label before use)

Warning: This product is only intended to be consumed by healthy individuals 18 years of age or older.

Consult your physician prior to use if you are pregnant or nursing. Consult your physician prior to use if you are taking any medications or have any medical condition.

Do not exceed recommended use. Improper use will not improve results. Discontinue use and seek professional assistance immediately if you experience unwanted side effects. Discontinue use 2 weeks prior to surgery. Do not use if safety seal is broken or missing.

Keep out of reach of children.

Suggested/Recommended/Usage/Directions

Recommended Use: As a dietary supplement, mix 1-2 scoops with 8 ounces of cold water or juice. Consume 1-3 times daily, preferably on an empty stomach.

Storage

Store in a cool, dry place.

General Statements

Contents are sold by weight not volume. Some settling may occur.

FDA Disclaimer Statement

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Formula

500 mg per serving

FDA Statement of Identity

Dietary Supplement

Seals/Symbols

Quality Guaranteed Nuricost Made in the USA

Formulation

Non GMO Gluten Free product

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

GABA 500 mg Unflavored by Nutricost label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

GABA 500 mg Unflavored label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in GABA 500 mg Unflavored by Nutricost

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size1 Scoop(s) Dosage formPowder Servings per container1000 Amounts shown are per serving.

GABA

Interacts with
419 drugs
500 mg per serving

GABA is a calming chemical messenger (neurotransmitter) that your body makes on its own, and it is sold as a supplement for stress, anxiety, and sleep...

GABA monograph & interactions

Other (inactive) ingredients: None. These complete the product’s ingredient list but are not active constituents.

Interaction report

GABA 500 mg Unflavored by Nutricost Drug Interactions

Want to check YOUR meds against GABA 500 mg Unflavored?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

 Go to the checker
419Drugs
172 Moderate 247 Minor

Ingredients driving the most interactions

GABA 419

Individual Drug Interactions

The ingredients in GABA 500 mg Unflavored interact with 419 drugs. Click any drug to see the details.

1 of the 1 ingredient in GABA 500 mg Unflavored interact with drugs. Each result below shows which ingredient is responsible. GABA

Each ingredient & the kinds of drugs it affects

For each ingredient in GABA 500 mg Unflavored with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

GABA2 drug types · 419 drugs

Antihypertensive Drugs

Theoretically, taking GABA with antihypertensive drugs might increase the risk of hypotension.
Some clinical research shows that GABA can decrease blood pressure in patients with hypertension.

Likelihood Possible Evidence B
Cns Depressants

Theoretically, GABA might have additive sedative effects when used in conjunction with CNS depressants. However, it is unclear if this concern is clinically relevant.
Endogenous GABA has well-established relaxant effects and GABA(A) receptors have an established physiological role in sleep. However, the effects of GABA supplements are unclear, as it is unknown whether exogenous GABA crosses the blood-brain barrier. Although there have been limited reports of drowsiness or tiredness with GABA supplements, these effects have not been widely reported in clinical studies. Additionally, intravenous GABA 0.1-1 mg/kg has been shown to induce anxiety in a dose-dependent manner.

Likelihood Unlikely Evidence D
GABA full monograph & interactions
The maker

Brand information

Manufacturer and brand details for GABA 500 mg Unflavored, from the product label.

Nutricost

See all Nutricost products
Name
Nutricost
Street Address
7 S 1550 W #200
City
Lindon
State
UT
ZipCode
84042
Phone Number
(866) 438-3694
Web Address
www.nutricost.com
Pharmacist Counseling Corner

GABA 500 mg Unflavored by Nutricost: Common Questions

Does GABA 500 mg Unflavored by Nutricost interact with any medications?
Yes. Based on its ingredients, GABA 500 mg Unflavored has a known interaction with 419 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
GABA 500 mg Unflavored contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
What is GABA and why is it in this supplement?
GABA is a chemical messenger in your brain that naturally helps calm nerve signals and promote relaxation. Manufacturers include it in supplements because some people take it hoping to reduce anxiety and improve sleep, though the evidence supporting those uses isn't yet strong enough to confirm they work.
Will this make me drowsy?
Drowsiness is the most commonly reported side effect in trials of oral GABA. If you experience it, don't drive or operate machinery. If it's severe or persistent, talk with your pharmacist about whether to continue.
Is it safe to take if I'm pregnant or breastfeeding?
There isn't enough safety information to know whether GABA is safe during pregnancy. During breastfeeding, the safety data advises against it. Talk with your doctor or pharmacist before taking it if either applies to you.
How long can I safely take this?
GABA appears generally well tolerated short-term, but long-term safety hasn't been well studied. If you plan to take it regularly for weeks or months, discuss that with your doctor or pharmacist.
What are the side effects?
The most common ones reported in trials are drowsiness, upset stomach, minor throat burning, muscle weakness, and nausea. One study noted a single case of temporary loss of menstrual periods. Serious side effects are rare, but a thorough safety review hasn't been completed.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Not sure if GABA 500 mg Unflavored is safe with your meds?

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Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

GABA 500 mg Unflavored label
Go deeper

The Full Monographs Behind GABA 500 mg Unflavored’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Gamma-aminobutyric Acid (gaba)

Interacts with 419 drugs

GABA is a calming chemical messenger (neurotransmitter) that your body makes on its own, and it is sold as a supplement for stress, anxiety, and sleep. The science behind oral GABA supplemen...

Read the full Gamma-aminobutyric Acid (gaba) monograph →
Sources

Sources & How We Checked

GABA 500 mg Unflavored's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 12 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Gamma-aminobutyric Acid (gaba) 12 references
  1. Cavagnini F, Invitti C, Pinto M, et al. Effect of acute and repeated administration of gamma aminobutyric acid (GABA) on growth hormone and prolactin secretion in man. Acta Endocrinol (Copenh) 1980;93:149-54.
  2. Nurnberger JI Jr, Berrettini WH, Simmons-Alling S, et al. Intravenous GABA administration is anxiogenic in man. Psychiatry Res 1986;19:113-7. PubMed
  3. Gershman RN, Vasilenko MA, Iliushina GG, et al. [Gammalon in the rehabilitation in infantile cerebral palsy]. Pediatr.Akus.Ginekol. 1977;(6):26-7.
  4. Loeb C, Benassi E, Bo, GP, et al. Preliminary evaluation of the effect of GABA and phosphatidylserine in epileptic patients. Epilepsy Res. 1987;1:209-12 . PubMed
  5. Inoue K, Shirai T, Ochiai H, et al. Blood-pressure-lowering effect of a novel fermented milk containing gamma-aminobutyric acid (GABA) in mild hypertensives. Eur J Clin Nutr 2003;57:490-95.
  6. ELLIOTT, K. A. and JASPER, H. H. Gammaaminobutyric acid. Physiol Rev. 1959;39(2):383-406.
  7. Winsky-Sommerer, R. Role of GABAA receptors in the physiology and pharmacology of sleep. Eur.J.Neurosci. 2009;29(9):1779-1794.
  8. Meldrum, B. S. GABAergic mechanisms in the pathogenesis and treatment of epilepsy. Br.J.Clin.Pharmacol. 1989;27 Suppl 1:3S-11S. PubMed
  9. Loeb, C., Marinari, U. M., Benassi, E., Besio, G., Cottalasso, D., Cupello, A., Maffini, M., Mainardi, P., Pronzato, M. A., and Scotto, P. A. Phosphatidylserine increases in vivo the synaptosomal uptake of exogenous GABA in rats. Exp.Neurol. 1988;99(2):4 PubMed
  10. Melis, G. B., Paoletti, A. M., Mais, V., and Fioretti, P. Interference of dopamine infusion on gamma-amino butyric acid (GABA)-stimulated prolactin increase. J.Endocrinol.Invest 1980;3(4):445-448.
  11. Boonstra E, de Kleijn R, Colzato LS, Alkemade A, Forstmann BU, Nieuwenhuis S. Neurotransmitters as food supplements: the effects of GABA on brain and behavior. Front Psychol. 2015 Oct 6;6:1520. doi: 10.3389/fpsyg.2015.01520. eCollection 2015. PubMed
  12. de Bie TH, Witkamp RF, Balvers MG, Jongsma MA. Effects of ?-aminobutyric acid supplementation on glucose control in adults with prediabetes: A double-blind, randomized, placebo-controlled trial. Am J Clin Nutr 2023;118(3):708-719. PubMed

See these in context on the Gamma-aminobutyric Acid (gaba) monograph →

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

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