---
title: "Arginine Ornithine Supplement — $26K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/arginine-ornithine-supplement"
last_updated: "2026-08-09T15:34:53.017Z"
locale: en
meta:
description: "Niche score 42/100 · $26K/yr market · 9K searches/yr · $18.19 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 42/100 · $26K/yr market · 9K searches/yr · $18.19 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Arginine Ornithine Supplement — $26K/yr Amazon US Niche (2026) - Flapen"
---
# **arginine ornithine supplement**
**Skip it**
A small market ($26K/yr) — this niche doesn't clear our bar today.
Market size 7Growth 22Conversion 97Competition 12Returns 100Price range 81Avg price 83Brand share 13Review moat 77Quality gap 28
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****15.4%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$18.19**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$9.82–$39.44**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Great****456.88**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-5.8%**
90-day search growth — must beat 0% to launch
**Brand share**
**Bad****95%**
top-5 brand share — brand-locked demand
**Competition**
**Bad****86%**
top-5 click share — a locked-up shelf
**Market size**
**Bad****$26K**
$26K/yr · 9K searches
According to Flapen's Amazon United States niche tracking, arginine ornithine supplement is a $26K/yr Amazon United States market (9K searches/yr). The top 5 brands hold 95% of demand. Demand peaks in Aug–Dec. Verdict: Skip it — 42/100.
Data updated Jul 25, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **arginine ornithine supplement market data**
- **Units sold / yr**
- **1K–1K**
- avg 100–250/product
- **Revenue / yr**
- **$18K–$23K**
- units × avg price
- **Conversion rate**
- **15.4%**
- **Avg BSR**
- **#799**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **38%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **108 months**
- **Avg seller age**
- **185 days**
## **Competition & brand share**
The top 5 products capture 86% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**6 **—flat
**Sellers**
**21**
**Top-5 brand share**
**95%**
Top 20: 100%
**Top-5 click share**
**86%**
Top 20: 100%
**Open market**
**0%**
- Nutricost41% - NOW Foods23% - Best Naturals20% - Life Extension6% - Oxify6% - Pure Encapsulations5%
## **Demand & seasonality**
Weekly Amazon search volume, last 98 weeks — -5.8% search growth over the last 90 days.
800600Spike '24Holiday '24Prime Day '25Spike '25Black Friday '25Spike '26 seasonDecMarJunAugNovMarMay
Peak months: Aug, Dec · busiest ÷ quietest = 1.6×
[**Open Trend **](https://flapen.com/research/us/health-household/arginine-ornithine-supplement/trend)
## **Top arginine ornithine supplement search terms**
- **arginine ornithine supplement**4K/yr-29.8%10.5% conv. - **arginine ornithine**2K/yr+47.8%6.9% conv. - **arginine and ornithine**2K/yr-4.3%9.8% conv. - **arginine and orthenine**799/yr-13.8%0.9% conv. [**All search terms **](https://flapen.com/research/us/health-household/arginine-ornithine-supplement/search-terms)
## **Top arginine ornithine 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%15%$4K30%$8K45%$12K60%$16K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 8 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Nutricost L-Arginine L-Ornithine 750mg; 180 Capsules**Nutricost**$16.73**4.6★1,464 rev](https://www.amazon.com/dp/B01CKNC8GI) [2**Best Naturals L-Arginine L-Ornithine - 1000mg per Serving - 120 Tablets - Non-GMO & Gluten Free (120 Count (Pack of 1))**Best Naturals**$9.82**4.5★294 rev](https://www.amazon.com/dp/B0BLY4N6C4) [3**NOW Foods Sports Nutrition Arginine & Ornithine 500/250 mg Amino Acids 250 Veg Capsules**NOW Foods**$24.94**4.6★811 rev](https://www.amazon.com/dp/B0013OVZXS) [4**Life Extension Arginine Ornithine Powder Promotes Muscle Health & Recovery Gluten Free Non-GMO net Weight 150 Grams**Life Extension**$15.22**4.3★81 rev](https://www.amazon.com/dp/B000P5XXZ4) [5**Oxify L-Arginine L-Ornithine 1000 mg | 120 Tablets | Gluten-Free Non-GMO | Supplement Made in USA**Oxify**$9.90**4.9★31 rev](https://www.amazon.com/dp/B0FPXTGTFH)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Pure Encapsulations Growth Hormone Support - Arginine & Ornithine Amino Acid Blend - Supports Healthy Hormone Balance - Muscles & Training Support - Gluten-Free & Non-GMO - 90 Capsules**Pure Encapsulations**$39.44**29 rev4mo ago](https://www.amazon.com/dp/B003PQZLK0) [**Oxify L-Arginine L-Ornithine 1000 mg | 120 Tablets | Gluten-Free Non-GMO | Supplement Made in USA**Oxify**$9.90**31 rev10mo ago](https://www.amazon.com/dp/B0FPXTGTFH) [**Best Naturals L-Arginine L-Ornithine - 1000mg per Serving - 120 Tablets - Non-GMO & Gluten Free (120 Count (Pack of 1))**Best Naturals**$9.82**294 rev3y ago](https://www.amazon.com/dp/B0BLY4N6C4) [**Nutricost L-Arginine L-Ornithine 750mg; 180 Capsules**Nutricost**$16.73**1,464 rev10y ago](https://www.amazon.com/dp/B01CKNC8GI) [**Life Extension Arginine Ornithine Powder Promotes Muscle Health & Recovery Gluten Free Non-GMO net Weight 150 Grams**Life Extension**$15.22**81 rev16y ago](https://www.amazon.com/dp/B000P5XXZ4)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Pure Encapsulations Growth Hormone Support - Arginine & Ornithine Amino Acid Blend - Supports Healthy Hormone Balance - Muscles & Training Support - Gluten-Free & Non-GMO - 90 Capsules**Pure Encapsulations**$39.44**4.5★**▲ 404%**](https://www.amazon.com/dp/B003PQZLK0) [**Oxify L-Arginine L-Ornithine 1000 mg | 120 Tablets | Gluten-Free Non-GMO | Supplement Made in USA**Oxify**$9.90**4.9★**▲ 72%**](https://www.amazon.com/dp/B0FPXTGTFH) [**Arginine Ornithine Now Foods 100 Caps**NOW Foods**$14.63**4.5★**▲ 69%**](https://www.amazon.com/dp/B000JN4N9W) [**Life Extension Arginine Ornithine Powder Promotes Muscle Health & Recovery Gluten Free Non-GMO net Weight 150 Grams**Life Extension**$15.22**4.3★**▲ 16%**](https://www.amazon.com/dp/B000P5XXZ4) [**Best Naturals L-Arginine L-Ornithine - 1000mg per Serving - 120 Tablets - Non-GMO & Gluten Free (120 Count (Pack of 1))**Best Naturals**$9.82**4.5★**▲ 12%**](https://www.amazon.com/dp/B0BLY4N6C4)
**~~View all trending →~~**
## **What buyers say about arginine ornithine supplement**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Ingredients-Overall**14%
*“purity of the ingredients”*
**Quality-Overall**11%
*“The product feels very consistent and professionally made”*
**Hormonal Balance**8%
*“I really enjoy this growth hormone support supplement”*
**Vitamin**8%
*“Good supplements”*
**Side Effects**6%
*“hasnt caused any negative side effects”*
**Advertised Vs Actual Product**5%
*“As advertised”*
**Ease Of Use**4%
*“Capsules improve ease of use compared with powder supplements”*
**Ease Of Chewing/Swallowing**4%
*“The capsules are easy to swallow”*
**Certifications**3%
*“Excellent project third party tested”*
**Energy Level**3%
*“but adding this has seemed to help with energy”*
### **What buyers complain about **
**Value For Money**7%
*“Lacks Transparency for the Price”*
**Size-Overall**3%
*“The capsules are large”*
**Dosage**3%
*“not at the full dose until you are sure it wont affect you”*
**Flavor**3%
*“no candy flavoring or weird supplement theater”*
**Side Effects**2%
*“because the effects aren't always easily determined”*
**Vitamin**2%
*“Supplements are difficult to review”*
**Muscle Pain Relief**2%
*“Obviously hard to tell if it is affecting muscle strength and/or growth”*
**Taste-Overall**1%
*“They have no taste”*
**Certifications**1%
*“However, I did not see mention of manufacturing in a GMP-certified facility or third-party testing, which would have added important reassurance—especially at this price point”*
**Ease Of Chewing/Swallowing**1%
*“Capsule size feels moderate during swallowing”*
## **Common questions**
- **Is arginine ornithine supplement profitable to sell on Amazon United States?**
- The niche generates $26K/yr across 8 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is -5.8%. Flapen's verdict: Skip it (42/100).
- **How competitive is the arginine ornithine supplement niche?**
- 6 brands and 21 sellers compete. The top 5 products take 86% of clicks and top 5 brands hold 95% of demand.
- **What do buyers complain about in arginine ornithine supplement?**
- Top complaints mined from reviews: Value For Money, Size-Overall, Dosage. The return rate is 0.0%.
- **When does demand for arginine ornithine supplement peak?**
- Demand peaks in Aug–Dec; the busiest month runs 1.6× the quietest.
- **What does it cost to enter the arginine ornithine supplement niche?**
- Listings span $9.82–$39.44; the average listing price is $18.19 (sweet spot $15–$100). The average incumbent carries 457 reviews — the moat a new listing must climb.
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