---
title: "L Arginine — £156K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/health-personal-care/l-arginine"
last_updated: "2026-07-31T13:26:54.817Z"
locale: en
meta:
description: "Niche score 54/100 · £156K/yr market · 157K searches/yr · £10.85 avg price. Soft demand (-5.8% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 54/100 · £156K/yr market · 157K searches/yr · £10.85 avg price. Soft demand (-5.8% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:title": "L Arginine — £156K/yr Amazon UK Niche (2026) - Flapen"
---
# **l arginine**
**Worth a look**
Shows low returns (0.1%), but soft demand (-5.8% this quarter) keeps it on the watch list.
Market size 33Growth 22Conversion 84Competition 57Returns 100Price range 24Avg price 40Brand share 63Review moat 37Quality gap 70
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****9.2%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Good****67%**
top-5 brand share — brands hold most of the demand
**Competition**
**Good****51%**
top-5 click share — leaders hold, buyers still browse
**Avg price**
**Okay****£10.85**
avg listing price — sweet spot $15–$100
**Review moat**
**Okay****2,767.04**
avg incumbent reviews — the moat a new listing must climb
**Market size**
**Okay****£156K**
£156K/yr · 157K searches
**Price range**
**Bad****£3.06–£18.79**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Bad****-5.8%**
90-day search growth — must beat 0% to launch
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=uk&signal=no_dominant_brand "Top brand's click share < 20%")
According to Flapen's Amazon United Kingdom niche tracking, l arginine is a £156K/yr Amazon United Kingdom market (157K searches/yr). The top 5 brands hold 67% of demand. Verdict: Worth a look — 54/100.
Data updated Jul 25, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **l arginine market data**
- **Units sold / yr**
- **13K–15K**
- avg 500–750/product
- **Revenue / yr**
- **£136K–£163K**
- units × avg price
- **Conversion rate**
- **9.2%**
- **Avg BSR**
- **#19**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **79%**
- **Out of stock**
- **1.0%**
- **Avg brand age**
- **46 months**
- **Avg seller age**
- **162 days**
## **Competition & brand share**
The top 5 products take 51% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**16 **▼falling
**Sellers**
**37**
**Top-5 brand share**
**67%**
Top 20: 100%
**Top-5 click share**
**51%**
Top 20: 96%
**Open market**
**25%**
- Best Naturals20% - Horbäach16% - Solgar15% - Vitamaze - amazing life9% - HAVASU NUTRITION8% - ALPHA018%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -5.8% search growth over the last 90 days.
5K3KSpike '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.4×
[**Open Trend **](https://flapen.com/research/uk/health-personal-care/l-arginine/trend)
## **Top l arginine search terms**
- **l arginine**66K/yr-12.9%7.1% conv. - **l-arginine**38K/yr-12.5%8.9% conv. - **arginine**24K/yr+17.9%7.2% conv. - **arginine supplement**8K/yr+62.2%6.8% conv. - **larginine**5K/yr-8.5%9.5% conv. - **l arginine 1000mg capsules**6K/yr-28.2%9.3% conv. - **larginine supplements men**4K/yr-10.9%8.7% conv. - **l-arginine nutritional supplements**3K/yr+60.2%7.6% conv. - **l arginine supplements for men**3K/yr-43.7%5.9% conv. [**All search terms **](https://flapen.com/research/uk/health-personal-care/l-arginine/search-terms)
## **Top l arginine 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%4%£6K8%£12K12%£19K16%£25K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**L Arginine and L Citrulline 1200mg Capsules | 180 Count | Amino Acids | Supplements for Men and Women | Suitable for Vegans & Vegetarians | by Horbaach**Horbäach**£8.39**4.4★953 rev](https://www.amazon.co.uk/dp/B095JK8Q25) [2**Solgar L-Arginine 1000mg Tablets - Pack of 90 - for a Healthy Metabolism - Ideal for Athletes - Vegan and Gluten Free Gold**Solgar**£14.40**4.5★490 rev](https://www.amazon.co.uk/dp/B002QUWXF2) [3**L Arginine 4500 mg 360 Capsules for Sport Performance Booster Supplements for Men and Women Natural Supplement of Pure L Arginine Without Additives Vitamaze**Vitamaze - amazing life**£15.73**4.3★5,376 rev](https://www.amazon.co.uk/dp/B010DW716K) [4**L Arginine Supplement for Men | NO Nitric Oxide Supplements for Men | Workouts & Endurance | L-Arginine L Citrulline Complex with Beet Root Powder for Male Health | Non-GMO Gluten-Free | 60 Ct**HAVASU NUTRITION**£15.77**4.2★46,796 rev](https://www.amazon.co.uk/dp/B01MS461VC) [5**Bandini L-Arginine 360 Capsules - 4500 mg High Dosage - Caps with Pure L Arginin HCL Powder - Natural Food Supplement - No Additives Vegan - Ideal for Athletes - Italian Quality**BANDINI**£14.73**4.2★415 rev](https://www.amazon.co.uk/dp/B0D7C2HGZ8)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**L Arginine and L Citrulline with Beetroot Extract - Nitric Oxide Supplement - 120 Vegan Capsules 2 Month Supply for Men & Women - Non-GMO UK Made by New Leaf**NEW LEAF PRODUCTS**£11.66**0 rev1mo ago](https://www.amazon.co.uk/dp/B0H4RC1J46) [**Bandini L-Arginine 360 Capsules - 4500 mg High Dosage - Caps with Pure L Arginin HCL Powder - Natural Food Supplement - No Additives Vegan - Ideal for Athletes - Italian Quality**BANDINI**£14.73**415 rev2y ago](https://www.amazon.co.uk/dp/B0D7C2HGZ8) [**Applied Nutrition AAKG - L Arginine Alpha Ketoglutarate 3000mg per Serving Nitric Oxide Pre Workout Energy Boost Muscle Pump Supplement (300g - 100 Servings)**Applied Nutrition**£12.24**53 rev2y ago](https://www.amazon.co.uk/dp/B0D676G2MX) [**3 000mg Nitric Oxide Supplement - 99% Purified L-Arginine and L-Citrulline - Beet Root - Clinically Studied Velox Blend - Nitric Oxide Booster for Men - 120 Capsules - Toniiq**Toniiq**£18.79**954 rev2y ago](https://www.amazon.co.uk/dp/B0D4QB6MKN) [**Applied Nutrition L-Arginine Capsules - 1500mg High Strength L Arginine Per Serving Nitric Oxide Booster for Workout & Performance (60 Servings)**Applied Nutrition**£13.26**16 rev2y ago](https://www.amazon.co.uk/dp/B0CTS6X2C4)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**L Arginine and L Citrulline with Beetroot Extract - Nitric Oxide Supplement - 120 Vegan Capsules 2 Month Supply for Men & Women - Non-GMO UK Made by New Leaf**NEW LEAF PRODUCTS**£11.66**0.0★**▲ 379%**](https://www.amazon.co.uk/dp/B0H4RC1J46) [**Solgar L-Arginine 1000mg Tablets - Pack of 90 - for a Healthy Metabolism - Ideal for Athletes - Vegan and Gluten Free Gold**Solgar**£14.40**4.5★**▲ 95%**](https://www.amazon.co.uk/dp/B002QUWXF2) [**Best Naturals L-Arginine L-Citrulline Complex 1000 mg 250 Tablets (250 Count (Pack of 1))**Best Naturals**£18.07**4.3★**▲ 88%**](https://www.amazon.co.uk/dp/B00O5E41M0) [**Nuke Nutrition L Arginine Capsules 1500mg - 60 Capsules - Nitric Oxide Supplement for Men & Women to Improve Muscle Strength Endurance & Mass - Nutritional Pre Workout - Nitric Acid Pills for Energy**Nuke Nutrition**£7.51**4.4★**▲ 59%**](https://www.amazon.co.uk/dp/B097TPHFFP) [**Nitric Oxide L-Arginine 100% Pre Workout Supports Athletic Performance and Muscle Building | 120 Capsules**NutriVolv**£6.45**4.4★**▲ 37%**](https://www.amazon.co.uk/dp/B08NB8GVZ5)
**~~View all trending →~~**
## **What buyers say about l arginine**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**29%
*“so far no complaints”*
**Value For Money**12%
*“fair price”*
**Advertised Vs Actual Product**7%
*“does the job”*
**Efficiency**7%
*“Seems effective and simple to take”*
**Blood Pressure**5%
*“This supplement has really sorted out my BP”*
**Vitamin**5%
*“Excellent supplement”*
**Energy Level**4%
*“energy levels to some extent”*
**Ease Of Chewing/Swallowing**4%
*“Easy to swallow”*
**Ease Of Use**4%
*“Simple and easy to use”*
**Nutritional Content**3%
*“Decent supplement overall”*
### **What buyers complain about **
**Functionality-Overall**17%
*“No idea whether they work or not”*
**Value For Money**10%
*“Overpriced”*
**Advertised Vs Actual Product**8%
*“Very misleading”*
**Dosage**8%
*“Amoyyou have to take”*
**Side Effects**8%
*“Appears to have an aphrodisiac side effect”*
**Quality-Overall**5%
*“Not the best”*
**Taste-Overall**4%
*“this tasted really bad”*
**Solubility**3%
*“I found that these tablets are disintegrated to powder”*
**Ingredients-Overall**3%
*“Nitric oxide pills are a scam”*
**Breathability**3%
*“I sometimes had trouble getting my deep breath”*
### **Top return reasons **
**Ease Of Chewing/Swallowing**25%
**Functionality-Overall**17%
**Bitter**17%
**Dosage**17%
**Size-Overall**8%
**Solubility**8%
**Smell**8%
## **Common questions**
- **Is l arginine profitable to sell on Amazon United Kingdom?**
- The niche generates £156K/yr across 24 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -5.8%. Flapen's verdict: Worth a look (54/100).
- **How competitive is the l arginine niche?**
- 16 brands and 37 sellers compete. The top 5 products take 51% of clicks and top 5 brands hold 67% of demand.
- **What do buyers complain about in l arginine?**
- Top complaints mined from reviews: Functionality-Overall, Value For Money, Advertised Vs Actual Product. The return rate is 0.1%.
- **When does demand for l arginine peak?**
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- **What does it cost to enter the l arginine niche?**
- Listings span £3.06–£18.79; the average listing price is £10.85 (sweet spot $15–$100). The average incumbent carries 2,767 reviews — the moat a new listing must climb.
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