---
title: "L Glutamine Capsules — $3K/mo Amazon US Product Research"
canonical_url: "https://flapen.com/research/us/health-household/l-glutamine-capsules"
last_updated: "2026-08-12T15:05:32.320Z"
locale: en
meta:
description: "Amazon product research for l glutamine capsules: $3K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for l glutamine capsules: $3K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "L Glutamine Capsules — $3K/mo Amazon US Product Research"
---
# **L Glutamine Capsules**
**Worth a look**
Shows searches that convert (22.3% search→purchase), but a small market ($32K/yr) keeps it on the watch list.
Market size 8Growth 29Conversion 100Competition 46Returns 100Price range 87Avg price 88Brand share 68Review moat 43Quality gap 27
**Conversion**
**Incredible****22.3%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$20.22**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$9.35–$63.78**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Good****64%**
top-5 brand share — brands hold most of the demand
**Competition**
**Okay****57%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Okay****2,196**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Okay****+3.5%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****$32K**
$32K/yr · 7K searches
## **Is l glutamine capsules profitable on Amazon?**
According to Flapen's Amazon United States niche tracking, l glutamine capsules is a $32K/yr Amazon United States market (7K searches/yr). The top 5 brands hold 64% of demand. Verdict: Worth a look — 53/100.
Data updated Jul 25, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **l glutamine capsules market size & sales**
Units sold, revenue, conversion and listing quality across the tracked shelf.
- **Units sold / yr**
- **1K–1K**
- avg 0–100/product
- **Revenue / yr**
- **$20K–$25K**
- units × avg price
- **Conversion rate**
- **22.3%**
- **Avg BSR**
- **#184**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **75%**
- **Out of stock**
- **2.1%**
- **Avg brand age**
- **111 months**
- **Avg seller age**
- **172 days**
## **Competition: brands, sellers & click share**
The top 5 products take 57% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**16 **▼falling
**Sellers**
**97**
**Top-5 brand share**
**64%**
Top 20: 100%
**Top-5 click share**
**57%**
Top 20: 100%
**Open market**
**31%**
- NOW Foods30% - Horbäach14% - Double Wood Supplements9% - Nutricost6% - Pure Encapsulations5% - BulkSupplements5%
## **l glutamine capsules demand & seasonality**
Weekly Amazon search volume, last 98 weeks — +3.5% search growth over the last 90 days.
450350Spike '25Prime Day '25Black Friday '25Holiday '25Spike '26 seasonDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 2.4×
[**Open Trend **](https://flapen.com/research/us/health-household/l-glutamine-capsules/trend)
## **Top l glutamine capsules products & what they sell for**
Every tracked product — its share of the shelf, its review moat, and what it sells for.
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%10%$3K20%$6K30%$10K40%$13K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 20 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**NOW Foods Sports Nutrition L-Glutamine Double Strength 1 000 mg Amino Acid 120 Veg Capsules**NOW Foods**$13.22**4.7★974 rev](https://www.amazon.com/dp/B0013OQLD2) [2**Horbaach L Glutamine Capsules 1000mg | 180 Powder Pills**Horbäach**$9.99**4.7★411 rev](https://www.amazon.com/dp/B0C6N2N65F) [3**L Glutamine Capsules - (1000mg Servings 120 Capsules) Non-GMO Gluten Free Keto Safe Vegan Friendly Third Party Tested (for Endurance and Gut Health) by Double Wood**Double Wood Supplements**$9.92**4.6★542 rev](https://www.amazon.com/dp/B0CGB24861) [4**Nutricost L-Glutamine 800mg 180 Capsules - Gluten Free Non-GMO**Nutricost**$15.77**4.5★4,740 rev](https://www.amazon.com/dp/B01DCKSO84) [5**BulkSupplements.com L-Glutamine Capsules - Glutamine Supplement Amino Acid Supplement - Gluten Free 6 Capsules per Serving (5000mg) 360 Count (Pack of 1)**BulkSupplements**$26.55**4.6★533 rev](https://www.amazon.com/dp/B0BX1CLKN1)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Nugenix Essentials L-Glutamine 1500mg 100% Botanical L-Glutamine Amino Acid Protein Synthesis Supports Cellular Function 60 Capsules**Nugenix**$14.53**86 rev1y ago](https://www.amazon.com/dp/B0DHYDNTV1) [**NAKED L-Glutamine Muscle Recovery Capsules 1000mg 240 Count Made in The USA Non-GMO Gluten and Soy Free**NAKED**$19.85**2,177 rev2y ago](https://www.amazon.com/dp/B0CMXTTVK2) [**L Glutamine Capsules - (1000mg Servings 120 Capsules) Non-GMO Gluten Free Keto Safe Vegan Friendly Third Party Tested (for Endurance and Gut Health) by Double Wood**Double Wood Supplements**$9.92**542 rev2y ago](https://www.amazon.com/dp/B0CGB24861) [**HealthFare L Glutamine 1000mg | 240 Vegan Capsules | Extra Strength Amino Acid Supplement | Supports Digestive Balance Nutrient Absorption & Muscle Recovery | Non-GMO Gluten-Free | Made in USA**Healthfare**$14.25**98 rev3y ago](https://www.amazon.com/dp/B0C86MCN4F) [**Horbaach L Glutamine Capsules 1000mg | 180 Powder Pills**Horbäach**$9.99**411 rev3y ago](https://www.amazon.com/dp/B0C6N2N65F)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**NOW Foods Sports Nutrition L-Glutamine Double Strength 1 000 mg Amino Acid 120 Veg Capsules**NOW Foods**$13.22**4.7★**▲ 76%**](https://www.amazon.com/dp/B0013OQLD2) [**Pure Encapsulations L-Glutamine 850 mg | Supplement for Immune and Digestive Support Gut Health and Lining Repair Metabolism Boost and Muscle Support* | 250 Capsules**Pure Encapsulations**$63.78**4.6★**▲ 44%**](https://www.amazon.com/dp/B07XPD16DZ) [**THORNE - L-Glutamine - Amino Acid Supplement for Immune System & GI Health - Promotes Post-Exercise Muscle Cell Repair* - Third-Party Certified - Gluten Dairy & Soy-Free - 90 Capsules**THORNE**$25.05**4.6★**▲ 27%**](https://www.amazon.com/dp/B0797N816M) [**HealthFare L Glutamine 1000mg | 240 Vegan Capsules | Extra Strength Amino Acid Supplement | Supports Digestive Balance Nutrient Absorption & Muscle Recovery | Non-GMO Gluten-Free | Made in USA**Healthfare**$14.25**4.5★**▲ 20%**](https://www.amazon.com/dp/B0C86MCN4F) [**Best Naturals L-Glutamine 1000mg Fuel for Workout (Non-GMO) Tablets 180 Count**Best Naturals**$14.64**4.6★**▲ 13%**](https://www.amazon.com/dp/B01BU93PH4)
**~~View all trending →~~**
## **What reviews say buyers love and hate about l glutamine capsules**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**25%
*“Matches the description, good product”*
**Vitamin**10%
*“Best vitamin maker on the market”*
**Value For Money**8%
*“Good price”*
**Regulates Digestion**6%
*“HELPS GUT”*
**Advertised Vs Actual Product**6%
*“Good and as advertised”*
**Ease Of Chewing/Swallowing**5%
*“Easy on the stomach”*
**Acid Regulator/Stomach Ache Relief**5%
*“No more bloating”*
**Efficiency**4%
*“Seems Effective”*
**Cough Relief**3%
*“Its quality and works well for me in aiding recovery and gut health, easy to swallow, no after taste”*
**Immunity Booster**3%
*“This is a great general immune system”*
### **What buyers complain about **
**Dosage**12%
*“I have learned that it is a very bad dosage amount”*
**Functionality-Overall**10%
*“Not working”*
**Ingredients-Overall**8%
*“Two bottles, different ingredients”*
**Quality-Overall**7%
*“Questionable quality control and handling”*
**Allergies**6%
*“have a corn allergy/intolerance”*
**Sleep Quality**5%
*“Makes me a bit hyper at night so I take in the morning”*
**Taste-Overall**5%
*“Zero Taste Capsule”*
**Smell**4%
*“Mine smelled”*
**Side Effects**4%
*“I stopped taking them and I am now off of them for 24 hours and can finally, sort of breathe again without thinking I need an inhaler”*
**Ease Of Use**4%
*“I cannot open the lid”*
### **Top return reasons **
**Joint Pain**50%
**Size-Overall**50%
## **Common l glutamine capsules questions**
- **Is l glutamine capsules profitable to sell on Amazon United States?**
- The niche generates $32K/yr across 20 tracked products. 90-day search growth is +3.5%. Flapen's verdict: Worth a look (53/100).
- **How competitive is the l glutamine capsules niche?**
- 16 brands and 97 sellers compete. The top 5 products take 57% of clicks and top 5 brands hold 64% of demand.
- **What do buyers complain about in l glutamine capsules?**
- Top complaints mined from reviews: Dosage, Functionality-Overall, Ingredients-Overall. The return rate is 0.0%.
- **When does demand for l glutamine capsules peak?**
- Demand is steady year-round — the busiest month runs 2.4× the quietest.
- **What does it cost to enter the l glutamine capsules niche?**
- Listings span $9.35–$63.78; the average listing price is $20.22 (sweet spot $15–$100). The average incumbent carries 2,196 reviews — the moat a new listing must climb.
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