---
title: "Gaba L-theanine Supplement — $265K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/gaba-l-theanine-supplement"
last_updated: "2026-08-06T21:39:02.827Z"
locale: en
meta:
description: "Niche score 60/100 · $265K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 60/100 · $265K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Gaba L-theanine Supplement — $265K/yr Amazon US Niche (2026) - Flapen"
---
# **gaba l-theanine supplement**
**Worth a look**
Shows low returns (0.0%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 49Growth 30Conversion 77Competition 46Returns 100Price range 87Avg price 95Brand share 69Review moat 36Quality gap 52
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****$24.19**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$11.48–$48.89**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Great****7.5%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Good****63%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Market size**
**Okay****$265K**
$265K/yr · 145K searches
**Competition**
**Okay****57%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Okay****2,920.68**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Okay****+4.3%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, gaba l-theanine supplement is a $265K/yr Amazon United States market (145K searches/yr). The top 5 brands hold 63% of demand. Verdict: Worth a look — 60/100.
Data updated Jul 25, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **gaba l-theanine supplement market data**
- **Units sold / yr**
- **10K–13K**
- avg 500–750/product
- **Revenue / yr**
- **$242K–$302K**
- units × avg price
- **Conversion rate**
- **7.5%**
- **Avg BSR**
- **#548**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **86%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **52 months**
- **Avg seller age**
- **159 days**
## **Competition & brand share**
The top 5 products take 57% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**17 **▲rising
**Sellers**
**619**
**Top-5 brand share**
**63%**
Top 20: 100%
**Top-5 click share**
**57%**
Top 20: 97%
**Open market**
**32%**
- NUTRAHARMONY27% - Clean Nutraceuticals14% - Quicksilver Scientific9% - OLLY8% - NOW Foods6% - Pure Encapsulations5%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +4.3% search growth over the last 90 days.
4K3KSpike '25 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.3×
[**Open Trend **](https://flapen.com/research/us/health-household/gaba-l-theanine-supplement/trend)
## **Top gaba l-theanine supplement search terms**
- **gaba l-theanine supplement**103K/yr+18.0%5.8% conv. - **gaba l theanine**24K/yr-61.6%4.5% conv. - **l theanine gaba**7K/yr+23.0%3.7% conv. - **gaba l-theanine**4K/yr+53.6%5.9% conv. - **gaba and l-theanine supplement**4K/yr+66.3%4.1% conv. - **l theanine and gaba**5K/yr+17.5%3.2% conv. [**All search terms **](https://flapen.com/research/us/health-household/gaba-l-theanine-supplement/search-terms)
## **Top gaba l-theanine supplement products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%10%$27K20%$53K30%$80K40%$106K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 22 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**GABA L-Theanine 900 mg - Magnesium | Vitamin B6 - Calm Sleep Relaxation & Mood Support - Lab Tested - 750 mg Gamma AminoButyric Acid 150 mg L-Theanine - Non-Habit Forming Vegan - 120 Capsules**NUTRAHARMONY**$21.66**4.4★2,098 rev](https://www.amazon.com/dp/B0BZQBB3CX) [2**Clean Nutraceuticals GABA 750mg 5 HTP 200mg L Tryptophan 500mg L Theanine 200mg Ashwagandha SAM-e L-Glycine - Mood Support Vitamins for Women and Men with L-Tyrosine 5-HTP (5-Hydroxytryptophan)**Clean Nutraceuticals**$28.04**4.4★2,665 rev](https://www.amazon.com/dp/B0BVXY3SMH) [3**Quicksilver Scientific Liposomal GABA + L Theanine - Calm Stress Response & Brain Support - Bioavailable GABA Supplement with L Theanine 100mg (1.7oz/50ml)**Quicksilver Scientific**$36.25**4.2★852 rev](https://www.amazon.com/dp/B014WORTLW) [4**Dr. Mercola L-Theanine Plus GABA - Supports Relaxation - Focus & Cognitive Function - Stress Support Supplement - 200 mg L-Theanine - 100 mg GABA - 60 Capsules**Dr. Mercola**$29.34**4.5★93 rev](https://www.amazon.com/dp/B0CSPP4P44) [5**OLLY Goodbye Stress Gummy GABA L-Theanine Lemon Balm Stress Relief Supplement Berry - 42 Count**OLLY**$11.59**4.4★14,359 rev](https://www.amazon.com/dp/B01M1HYRNJ)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**GABA L-Theanine Ashwagandha - 1050mg Blend - Made in USA - Advanced Sleep Aid & Calm- Magnesium 5-HTP Vitamin B6 & B12 GABA (Gamma Aminobutyric Acid) Supplement - Melatonin-Free & Non-Habit Forming**Fidus**$15.36**660 rev7mo ago](https://www.amazon.com/dp/B0F8QKTPB6) [**Micro Ingredients GABA 750 mg with MCT Oil 300 Softgels | Gamma Aminobutyric Acid with Vitamin B6 5-HTP L-Theanine L-Tryptophan & Magnesium Glycinate | Non-GMO cGMP Manufactured**Micro Ingredients**$14.77**55 rev8mo ago](https://www.amazon.com/dp/B0G17PT98Y) [**Micro Ingredients 5-HTP 200mg 240 Softgels | Extra Strength 5-Hydroxytryptophan Complex with GABA L-Theanine Vitamin B6 | Highly Bioavailable with Hemp Seed Oil Carrier | Non-GMO**Micro Ingredients**$21.70**126 rev1y ago](https://www.amazon.com/dp/B0FJ477YCV) [**GABA Supplements 750mg with L-Theanine & Ashwagandha for Calm & Sleep 90CT**Lukaree**$19.30**160 rev1y ago](https://www.amazon.com/dp/B0F48G4SPX) [**NOW Foods Supplements L-Theanine 200 mg with Inositol Stress Management* 120 Veg Capsules with Now Supplements GABA (Gamma-Aminobutyric Acid) 750mg 100 Veg Capsules**NOW Foods**$34.98**14 rev1y ago](https://www.amazon.com/dp/B0FBXDPTVH)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Integrative Therapeutics Cortisol Manager - Balance Cortisol & Support Relaxation for Restful Sleep* - Includes Ashwagandha & L-Theanine for Confidence with Less Stress* - 30 Tablets**Integrative Therapeutics**$25.21**4.2★**▲ 195%**](https://www.amazon.com/dp/B002D2JYYG) [**Micro Ingredients GABA 750 mg with MCT Oil 300 Softgels | Gamma Aminobutyric Acid with Vitamin B6 5-HTP L-Theanine L-Tryptophan & Magnesium Glycinate | Non-GMO cGMP Manufactured**Micro Ingredients**$14.77**4.6★**▲ 193%**](https://www.amazon.com/dp/B0G17PT98Y) [**Nutricost GABA (Gamma Aminobutyric Acid) 750mg 240 Capsules**Nutricost**$18.76**4.6★**▲ 90%**](https://www.amazon.com/dp/B09CXT8S6S) [**GABA Supplement - 1000 mg Liposomal Form for Optimal Absorption GABA with L-Theanine Magnesium Glycinate 5HTP Vitamin D3 for Calm Relaxation Mood Restful Night - Melatonin-Free 120 Softgels.**LILICARE**$28.52**4.3★**▲ 54%**](https://www.amazon.com/dp/B0DF4QYM52) [**THORNE - PharmaGABA-100 - GABA Supplement - 100 mg Natural Source Gamma-Aminobutyric Acid - Support a Calm State of Mind and Restful Sleep* - 60 Capsules**THORNE**$32.24**4.5★**▲ 48%**](https://www.amazon.com/dp/B001904F74)
**~~View all trending →~~**
## **What buyers say about gaba l-theanine supplement**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Sleep Quality**21%
*“Helps with sleep”*
**Stress/Anxiety**16%
*“Stress reliever”*
**Quality-Overall**8%
*“Its non-GMO and clean, so I feel pretty good about the quality overall”*
**Efficiency**5%
*“Effective”*
**Vitamin**4%
*“Good supplement”*
**Soothing Effect**3%
*“Helps relax”*
**Advertised Vs Actual Product**3%
*“Just as advertised”*
**Focus Enhancement**3%
*“Actually helped improve my focus”*
**Value For Money**3%
*“reasonable price”*
**Side Effects**2%
*“Haven't experienced any side effects”*
### **What buyers complain about **
**Sleep Quality**20%
*“Did not help with sleep”*
**Functionality-Overall**13%
*“Not effective for me”*
**Stress/Anxiety**7%
*“DOES NOT HELP STRESS”*
**Side Effects**6%
*“Could make you VERY nauseous”*
**Value For Money**5%
*“Waste of money”*
**Dosage**3%
*“I dont know if its the dosage or a bad batch”*
**Acid Regulator/Stomach Ache Relief**2%
*“Upset my stomach”*
**Taste-Overall**2%
*“taste gross”*
**Heart Health**2%
*“both times I've had bad heart palpitations”*
**Ease Of Chewing/Swallowing**2%
*“hard to swallow”*
### **Top return reasons **
**Functionality-Overall**21%
**Sleep Quality**14%
**Acid Regulator/Stomach Ache Relief**14%
**Heart Health**7%
**Moist/Dry**7%
**Side Effects**7%
**Value For Money**7%
**Fever Relief**7%
**Flavor**7%
**Ease Of Chewing/Swallowing**4%
## **Common questions**
- **Is gaba l-theanine supplement profitable to sell on Amazon United States?**
- The niche generates $265K/yr across 22 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is +4.3%. Flapen's verdict: Worth a look (60/100).
- **How competitive is the gaba l-theanine supplement niche?**
- 17 brands and 619 sellers compete. The top 5 products take 57% of clicks and top 5 brands hold 63% of demand.
- **What do buyers complain about in gaba l-theanine supplement?**
- Top complaints mined from reviews: Sleep Quality, Functionality-Overall, Stress/Anxiety. The return rate is 0.0%.
- **When does demand for gaba l-theanine supplement peak?**
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- **What does it cost to enter the gaba l-theanine supplement niche?**
- Listings span $11.48–$48.89; the average listing price is $24.19 (sweet spot $15–$100). The average incumbent carries 2,921 reviews — the moat a new listing must climb.
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