---
title: "L Citrulline — $357K/mo Amazon US Product Research (2026)"
canonical_url: "https://flapen.com/research/us/health-household/l-citrulline"
last_updated: "2026-08-12T15:05:29.345Z"
locale: en
meta:
description: "Amazon product research for l citrulline: $357K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for l citrulline: $357K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "L Citrulline — $357K/mo Amazon US Product Research (2026)"
---
# **L Citrulline**
**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 97Growth 24Conversion 91Competition 64Returns 100Price range 89Avg price 95Brand share 55Review moat 24Quality gap 37
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Market size**
**Incredible****$4.3M**
$4.3M/yr · 1.6M searches
**Avg price**
**Incredible****$24.70**
avg listing price — sweet spot $15–$100
**Conversion**
**Great****11.0%**
search→purchase rate — share of searches ending in a sale
**Price range**
**Great****$10.10–$76.27**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Good****47%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Good****72%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-1.8%**
90-day search growth — must beat 0% to launch
**Review moat**
**Bad****5,971.17**
avg incumbent reviews — the moat a new listing must climb
## **Is l citrulline profitable on Amazon?**
According to Flapen's Amazon United States niche tracking, l citrulline is a $4.3M/yr Amazon United States market (1.6M searches/yr). The top 5 brands hold 72% of demand. Verdict: Worth a look — 66/100.
Data updated Jul 10, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **l citrulline market size & sales**
Units sold, revenue, conversion and listing quality across the tracked shelf.
- **Units sold / yr**
- **150K–200K**
- avg 5,000–6,000/product
- **Revenue / yr**
- **$3.7M–$4.9M**
- units × avg price
- **Conversion rate**
- **11.0%**
- **Avg BSR**
- **#245**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **90%**
- **Out of stock**
- **1.5%**
- **Avg brand age**
- **64 months**
- **Avg seller age**
- **144 days**
## **Competition: brands, sellers & click share**
The top 5 products take 47% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**17 **▲rising
**Sellers**
**30**
**Top-5 brand share**
**72%**
Top 20: 100%
**Top-5 click share**
**47%**
Top 20: 91%
**Open market**
**23%**
- Nutricost32% - BulkSupplements15% - DORADO NUTRITION13% - Kaged7% - NOW Foods5% - HAVASU NUTRITION5%
## **l citrulline demand & seasonality**
Weekly Amazon search volume, last 102 weeks — -1.8% search growth over the last 90 days.
40K30KPrime Day '24Prime Day '25Holiday '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.5×
[**Open Trend **](https://flapen.com/research/us/health-household/l-citrulline/trend)
## **Top l citrulline search terms shoppers use**
The exact queries shoppers type, with yearly volume, growth and conversion.
- **l citrulline**582K/yr+0.1%7.8% conv. - **l-citrulline**339K/yr-6.5%8.1% conv. - **citrulline**265K/yr-7.5%6.7% conv. - **l-citrulline for men**80K/yr+8.5%7.5% conv. - **l citrulline supplements for men**87K/yr-21.3%6.8% conv. - **l citrulline capsules**40K/yr+34.2%6.8% conv. - **citrulina**28K/yr+46.8%2.1% conv. - **citrulina for men**13K/yr+83.3%2.6% conv. - **l citruline**16K/yr+6.7%8.2% conv. - **citruline**15K/yr+0.8%6.8% conv. [**All search terms **](https://flapen.com/research/us/health-household/l-citrulline/search-terms)
## **Top l citrulline 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%4%$171K8%$342K12%$513K16%$685K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Nutricost L-Citrulline 2500mg Per Serving 60 Servings 1250mg Per Tablet 120 Tabs - Non-GMO and Gluten Free Supplement**Nutricost**$19.62**4.6★1,055 rev](https://www.amazon.com/dp/B09WCL8N52) [2**L Citrulline 3000mg Supplement (240 Capsules) Support L Arginine & Nitric Oxide Pills - L-Citrulline For Men & Women - Muscle Recovery & Pump Supplement - 3rd Party Tested Vegan Non-GMO - USA Made**DORADO NUTRITION**$17.89**4.5★1,894 rev](https://www.amazon.com/dp/B0BQP44PPS) [3**Nutricost Pure L-Citrulline (Base) Powder (600 Grams)**Nutricost**$29.47**4.7★3,343 rev](https://www.amazon.com/dp/B01M2DB8V3) [4**Kaged L-Citrulline Powder | Unflavored | Enhanced Pumps | Improve Muscle Vascularity | Nitric Oxide Booster | Supplements for Men & Women | 100 Servings**Kaged**$16.36**4.7★289 rev](https://www.amazon.com/dp/B0C7RFMT56) [5**Nutricost L-Citrulline 500mg 120 Capsules - Gluten Free Non-GMO 1000mg Per Serving (60 Serv)**Nutricost**$12.93**4.5★8,765 rev](https://www.amazon.com/dp/B07H4YS9L7)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Formulation Factory Heart of Steel Nitric Oxide Supplements for Men & Women Nitric Oxide Booster for Blood Flow & Circulation with L-Citrulline 1000mg L-Arginine CoQ10 & Resveratrol - 120 Capsules**Formulation Factory**$55.59**665 rev1y ago](https://www.amazon.com/dp/B0DK61GRD2) [**Nugenix Essentials L-Citrulline Supplement for Enhanced Blood Flow and Performance - 1500 mg 60 Capsules**Nugenix**$14.64**288 rev1y ago](https://www.amazon.com/dp/B0DHY5SS1F) [**Carlyle Nitric Oxide Supplement 3000mg | 120 Capsules | with L-Arginine & L-Citrulline | for Men & Women | Pre & Post Workout | Non-GMO Gluten Free**Carlyle**$10.10**1,380 rev2y ago](https://www.amazon.com/dp/B0CYRP3HV4) [**L Citrulline 3000mg Supplement (240 Capsules) Support L Arginine & Nitric Oxide Pills - L-Citrulline For Men & Women - Muscle Recovery & Pump Supplement - 3rd Party Tested Vegan Non-GMO - USA Made**DORADO NUTRITION**$17.89**1,894 rev2y ago](https://www.amazon.com/dp/B0BQP44PPS) [**Primaforce L-Citrulline 3000mg 240 Capsules 60 Servings**Primaforce**$21.17**152 rev3y ago](https://www.amazon.com/dp/B0C4M6693H)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**BulkSupplements.com L-Citrulline Capsules - Citrulline Supplement L-Citrulline 3000mg Capsules - Citrulline Pills Gluten Free - 8 Capsules per Serving 240 Capsules (Pack of 1)**BulkSupplements**$18.11**4.3★**▲ 79%**](https://www.amazon.com/dp/B0BB8GBTW6) [**Formulation Factory Heart of Steel Nitric Oxide Supplements for Men & Women Nitric Oxide Booster for Blood Flow & Circulation with L-Citrulline 1000mg L-Arginine CoQ10 & Resveratrol - 120 Capsules**Formulation Factory**$55.59**4.5★**▲ 74%**](https://www.amazon.com/dp/B0DK61GRD2) [**BulkSupplements.com L-Citrulline Powder - Citrulline Supplement Nitric Oxide Supplement - Unflavored & Gluten Free - 3g per Servings 1kg (2.2 lbs) (Pack of 1)**BulkSupplements**$33.31**4.7★**▲ 72%**](https://www.amazon.com/dp/B00NBCVVWA) [**Kaged L-Citrulline Powder | Unflavored | Enhanced Pumps | Improve Muscle Vascularity | Nitric Oxide Booster | Supplements for Men & Women | 100 Servings**Kaged**$16.36**4.7★**▲ 67%**](https://www.amazon.com/dp/B0C7RFMT56) [**Carlyle Nitric Oxide Supplement 3000mg | 120 Capsules | with L-Arginine & L-Citrulline | for Men & Women | Pre & Post Workout | Non-GMO Gluten Free**Carlyle**$10.10**4.4★**▲ 51%**](https://www.amazon.com/dp/B0CYRP3HV4)
**~~View all trending →~~**
## **What reviews say buyers love and hate about l citrulline**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**18%
*“Excellent product”*
**Value For Money**8%
*“Fair price”*
**Energy Level**7%
*“it really boosts my energy”*
**Blood Pressure**6%
*“Great BP support”*
**Vitamin**6%
*“Excellent Supplement”*
**Advertised Vs Actual Product**4%
*“AS DESCRIBED”*
**Efficiency**4%
*“Effective”*
**Heart Health**4%
*“I like that it supports heart health”*
**Ingredients-Overall**3%
*“clean ingredients”*
**Nutritional Content**3%
*“Easy Addition to My Daily Wellness Routine”*
### **What buyers complain about **
**Functionality-Overall**11%
*“Didn't work”*
**Taste-Overall**9%
*“The taste was extremely bitter”*
**Value For Money**6%
*“Waste of money”*
**Quality-Overall**5%
*“definitely poor quality controls”*
**Side Effects**5%
*“Avoid - bad side effects”*
**Dosage**4%
*“fails to tell you it takes 4 capsules to equal that dose”*
**Size-Overall**3%
*“These are way too big”*
**Vitamin**3%
*“All vitamin supplements are a bit over priced”*
**Ingredients-Overall**3%
*“but lo and behold when I re-read the ingredients in the new bottle I immediately cancelled it”*
**Advertised Vs Actual Product**2%
*“It seems deceiving to me”*
### **Top return reasons **
**Advertised Vs Actual Product**25%
**Size-Overall**17%
**Leak-Proof**17%
**Quality-Overall**17%
**Certifications**17%
**Side Effects**8%
## **Common l citrulline questions**
- **Is l citrulline profitable to sell on Amazon United States?**
- The niche generates $4.3M/yr across 29 tracked products. 3 of 3 products launched in the last 360 days are still selling. 90-day search growth is -1.8%. Flapen's verdict: Worth a look (66/100).
- **How competitive is the l citrulline niche?**
- 17 brands and 30 sellers compete. The top 5 products take 47% of clicks and top 5 brands hold 72% of demand.
- **What do buyers complain about in l citrulline?**
- Top complaints mined from reviews: Functionality-Overall, Taste-Overall, Value For Money. The return rate is 0.0%.
- **When does demand for l citrulline peak?**
- Demand is steady year-round — the busiest month runs 1.5× the quietest.
- **What does it cost to enter the l citrulline niche?**
- Listings span $10.10–$76.27; the average listing price is $24.70 (sweet spot $15–$100). The average incumbent carries 5,971 reviews — the moat a new listing must climb.
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