---
title: "L Citrulline — £173K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/health-personal-care/l-citrulline"
last_updated: "2026-07-31T15:15:27.192Z"
locale: en
meta:
description: "Niche score 43/100 · £173K/yr market · 175K searches/yr · £9.67 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 43/100 · £173K/yr market · 175K searches/yr · £9.67 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "L Citrulline — £173K/yr Amazon UK Niche (2026) - Flapen"
---
# **l citrulline**
**Skip it**
Brand-locked demand (top 5 brands take 95% of clicks) — this niche doesn't clear our bar today.
Market size 35Growth 19Conversion 88Competition 14Returns 100Price range 14Avg price 31Brand share 12Review moat 69Quality gap 68
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****10.2%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Good****725.5**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Market size**
**Okay****£173K**
£173K/yr · 175K searches
**Avg price**
**Okay****£9.67**
avg listing price — sweet spot $15–$100
**Growth**
**Bad****-11.5%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****83%**
top-5 click share — a locked-up shelf
**Price range**
**Bad****£6.52–£16.42**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Bad****95%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United Kingdom niche tracking, l citrulline is a £173K/yr Amazon United Kingdom market (175K searches/yr). The top 5 brands hold 95% of demand. Demand peaks in May. Verdict: Skip it — 43/100.
Data updated Jul 25, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **l citrulline market data**
- **Units sold / yr**
- **15K–20K**
- avg 1,250–1,500/product
- **Revenue / yr**
- **£145K–£193K**
- units × avg price
- **Conversion rate**
- **10.2%**
- **Avg BSR**
- **#7**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **80%**
- **Out of stock**
- **4.9%**
- **Avg brand age**
- **55 months**
- **Avg seller age**
- **159 days**
## **Competition & brand share**
The top 5 products capture 83% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**7 **▼falling
**Sellers**
**21**
**Top-5 brand share**
**95%**
Top 20: 100%
**Top-5 click share**
**83%**
Top 20: 100%
**Open market**
**2%**
- WeightWorld40% - Applied Nutrition17% - EVO NUTRITION16% - ALPHA0114% - Best Naturals9% - Bulk3% - Open — no brand owns it (1 brand, 2%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -11.5% search growth over the last 90 days.
5K4KSpike '24Spike '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: May · busiest ÷ quietest = 1.6×
[**Open Trend **](https://flapen.com/research/uk/health-personal-care/l-citrulline/trend)
## **Top l citrulline search terms**
- **l citrulline**73K/yr-13.8%7.2% conv. - **l-citrulline**45K/yr-10.3%8.8% conv. - **citrulline**28K/yr-28.2%6.2% conv. - **l- citrulline**8K/yr+44.7%4.8% conv. - **l citrulline capsules**12K/yr-17.1%8.1% conv. - **l-citrulline capsules**4K/yr+17.4%9.6% conv. - **lcitrulline**3K/yr+20.4%6.7% conv. - **citruline**3K/yr-16.6%8.7% conv. [**All search terms **](https://flapen.com/research/uk/health-personal-care/l-citrulline/search-terms)
## **Top l citrulline 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%£17K20%£35K30%£52K40%£69K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 10 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**L Citrulline 3000mg - 240 L-Citrulline Capsules - 2 Months Supply**WeightWorld**£16.42**4.3★1,331 rev](https://www.amazon.co.uk/dp/B0D1YNNYNY) [2**Beetroot Complex & L-Citrulline 10 000mg | 180 Capsules | High Strength | Nitric Oxide Booster to Support Circulation for Energy & Daily Wellness | Vegan Non-GMO UK Made 3 Months | EVO NUTRITION**EVO NUTRITION**£8.11**4.4★1,301 rev](https://www.amazon.co.uk/dp/B0FLQBKC2F) [3**L-Citrulline Malate 1500mg with BioPerine - 90 Vegan Capsules - High Strength Fermented Amino Acid Supplement - 45 Day Supply - Resealable and Recyclable Pouch by Alpha01**ALPHA01**£6.52**4.5★156 rev](https://www.amazon.co.uk/dp/B0C191TKB6) [4**Applied Nutrition L-Citrulline 1500-1500mg L Citrulline Per Serving Citrulline Capsules for Muscle Pump Muscle Recovery Supplement Increases Levels of L-Arginine and Nitric Oxide - 60 Servings**Applied Nutrition**£10.73**4.1★40 rev](https://www.amazon.co.uk/dp/B0DFYLWJK2) [5**Applied Nutrition Citrulline Malate 2:1 | 3000mg per Serving Nitric Oxide Booster Amino Acid Powder Supports Muscle Recovery Improves Performance Vegan Gluten Free (300g - 100 Servings) (Unflavoured)**Applied Nutrition**£10.80**4.6★218 rev](https://www.amazon.co.uk/dp/B0D6W6TYXZ)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Beetroot Complex & L-Citrulline 10 000mg | 180 Capsules | High Strength | Nitric Oxide Booster to Support Circulation for Energy & Daily Wellness | Vegan Non-GMO UK Made 3 Months | EVO NUTRITION**EVO NUTRITION**£8.11**1,301 rev11mo ago](https://www.amazon.co.uk/dp/B0FLQBKC2F) [**Applied Nutrition L-Citrulline 1500-1500mg L Citrulline Per Serving Citrulline Capsules for Muscle Pump Muscle Recovery Supplement Increases Levels of L-Arginine and Nitric Oxide - 60 Servings**Applied Nutrition**£10.73**40 rev1y ago](https://www.amazon.co.uk/dp/B0DFYLWJK2) [**Applied Nutrition Citrulline Malate 2:1 | 3000mg per Serving Nitric Oxide Booster Amino Acid Powder Supports Muscle Recovery Improves Performance Vegan Gluten Free (300g - 100 Servings) (Unflavoured)**Applied Nutrition**£10.80**218 rev2y ago](https://www.amazon.co.uk/dp/B0D6W6TYXZ) [**L Citrulline 3000mg - 240 L-Citrulline Capsules - 2 Months Supply**WeightWorld**£16.42**1,331 rev2y ago](https://www.amazon.co.uk/dp/B0D1YNNYNY) [**Bandini CITRULLINE Malate 90 Tablets 3000 mg per Daily Dose - Extra-High Dosage (1 Month Coverage) - 100% Vegan L-Citrulline from Fermentation - Citrullin for Athletes and Bodybuilders**BANDINI**£8.80**1,292 rev3y ago](https://www.amazon.co.uk/dp/B0BS9DHYXD)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**L-Citrulline Malate Powder 500g Unflavoured 5 Grams per Serving Vegan Fermented Amino Acid Resealable and Recyclable Pouch by Alpha01**ALPHA01**£6.78**4.3★**▲ 247%**](https://www.amazon.co.uk/dp/B0DDMD2RWX) [**Beetroot Complex & L-Citrulline 10 000mg | 180 Capsules | High Strength | Nitric Oxide Booster to Support Circulation for Energy & Daily Wellness | Vegan Non-GMO UK Made 3 Months | EVO NUTRITION**EVO NUTRITION**£8.11**4.4★**▲ 42%**](https://www.amazon.co.uk/dp/B0FLQBKC2F) [**Applied Nutrition L-Citrulline 1500-1500mg L Citrulline Per Serving Citrulline Capsules for Muscle Pump Muscle Recovery Supplement Increases Levels of L-Arginine and Nitric Oxide - 60 Servings**Applied Nutrition**£10.73**4.1★**▲ 16%**](https://www.amazon.co.uk/dp/B0DFYLWJK2) [**Applied Nutrition Citrulline Malate 2:1 | 3000mg per Serving Nitric Oxide Booster Amino Acid Powder Supports Muscle Recovery Improves Performance Vegan Gluten Free (300g - 100 Servings) (Unflavoured)**Applied Nutrition**£10.80**4.6★**▲ 12%**](https://www.amazon.co.uk/dp/B0D6W6TYXZ) [**Bulk Citrulline Malate 500 g**Bulk**£7.94**4.2★**— 7%**](https://www.amazon.co.uk/dp/B00H3C13GI)
**~~View all trending →~~**
## **What buyers say about l citrulline**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**20%
*“Well-made, easy to take”*
**Value For Money**11%
*“Good value”*
**Advertised Vs Actual Product**10%
*“As advertised well pleased”*
**Ease Of Chewing/Swallowing**7%
*“easy to take without any gut issues”*
**Blood Pressure**6%
*“blood pressure is good”*
**Ease Of Use**5%
*“Easy to use”*
**Energy Level**4%
*“More energy”*
**Vitamin**4%
*“Vitamin”*
**Side Effects**3%
*“no bad reactions”*
**Nutritional Content**3%
*“Good dietary supplement”*
### **What buyers complain about **
**Dosage**13%
*“Can't say if they've done anything for me after taking 180 tablets”*
**Taste-Overall**12%
*“have no taste”*
**Functionality-Overall**7%
*“Not working”*
**Ingredients-Overall**6%
*“Very poor quality as the main ingredient is corn starch which is just a filler”*
**Size-Overall**4%
*“They are small”*
**Side Effects**4%
*“it had immediate effects”*
**Smell**4%
*“earthy smell that I found extremely unpleasant”*
**Blood Pressure**3%
*“I have high blood pressure”*
**Ease Of Chewing/Swallowing**3%
*“I cannot swallow it”*
**Advertised Vs Actual Product**3%
*“But it doesn't do like they advertise”*
## **Common questions**
- **Is l citrulline profitable to sell on Amazon United Kingdom?**
- The niche generates £173K/yr across 10 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -11.5%. Flapen's verdict: Skip it (43/100).
- **How competitive is the l citrulline niche?**
- 7 brands and 21 sellers compete. The top 5 products take 83% of clicks and top 5 brands hold 95% of demand.
- **What do buyers complain about in l citrulline?**
- Top complaints mined from reviews: Dosage, Taste-Overall, Functionality-Overall. The return rate is 0.0%.
- **When does demand for l citrulline peak?**
- Demand peaks in May; the busiest month runs 1.6× the quietest.
- **What does it cost to enter the l citrulline niche?**
- Listings span £6.52–£16.42; the average listing price is £9.67 (sweet spot $15–$100). The average incumbent carries 726 reviews — the moat a new listing must climb.
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