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.

arginine ornithine supplement

Skip it

A small market ($26K/yr) — this niche doesn't clear our bar today.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Incredible15.4%

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

Great456.88

avg incumbent reviews — the moat a new listing must climb

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Growth

Bad-5.8%

90-day search growth — must beat 0% to launch

Brand share

Bad95%

top-5 brand share — brand-locked demand

Competition

Bad86%

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

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

Top-5 brand share

95%

Top 20: 100%

Top-5 click share

86%

Top 20: 100%

Open market

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.

Peak months: Aug, Dec · busiest ÷ quietest = 1.6×

Open Trend

Top arginine ornithine supplement search terms

arginine ornithine supplement4K/yr -29.8%10.5% conv.
arginine ornithine2K/yr +47.8%6.9% conv.
arginine and ornithine2K/yr -4.3%9.8% conv.
arginine and orthenine799/yr -13.8%0.9% conv.

All 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.

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

Nutricost L-Arginine L-Ornithine 750mg; 180 Capsules

Nutricost$16.734.6★1,464 rev

Best Naturals L-Arginine L-Ornithine - 1000mg per Serving - 120 Tablets - Non-GMO & Gluten Free (120 Count (Pack of 1))

Best Naturals$9.824.5★294 rev

NOW Foods Sports Nutrition Arginine & Ornithine 500/250 mg Amino Acids 250 Veg Capsules

NOW Foods$24.944.6★811 rev

Life Extension Arginine Ornithine Powder Promotes Muscle Health & Recovery Gluten Free Non-GMO net Weight 150 Grams

Life Extension$15.224.3★81 rev

Oxify L-Arginine L-Ornithine 1000 mg | 120 Tablets | Gluten-Free Non-GMO | Supplement Made in USA

Oxify$9.904.9★31 rev

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$39.4429 rev

4mo ago

Oxify L-Arginine L-Ornithine 1000 mg | 120 Tablets | Gluten-Free Non-GMO | Supplement Made in USA

Oxify$9.9031 rev

10mo ago

Best Naturals L-Arginine L-Ornithine - 1000mg per Serving - 120 Tablets - Non-GMO & Gluten Free (120 Count (Pack of 1))

Best Naturals$9.82294 rev

3y ago

Nutricost L-Arginine L-Ornithine 750mg; 180 Capsules

Nutricost$16.731,464 rev

10y ago

Life Extension Arginine Ornithine Powder Promotes Muscle Health & Recovery Gluten Free Non-GMO net Weight 150 Grams

Life Extension$15.2281 rev

16y ago

What buyers say about arginine ornithine supplement

What buyers praise and complain about, mined from review topics.

What buyers love

Ingredients-Overall14%

“purity of the ingredients”

Quality-Overall11%

“The product feels very consistent and professionally made”

Hormonal Balance8%

“I really enjoy this growth hormone support supplement”

Vitamin8%

“Good supplements”

Side Effects6%

“hasnt caused any negative side effects”

Advertised Vs Actual Product5%

“As advertised”

Ease Of Use4%

“Capsules improve ease of use compared with powder supplements”

Ease Of Chewing/Swallowing4%

“The capsules are easy to swallow”

Certifications3%

“Excellent project third party tested”

Energy Level3%

“but adding this has seemed to help with energy”

What buyers complain about

Value For Money7%

“Lacks Transparency for the Price”

Size-Overall3%

“The capsules are large”

Dosage3%

“not at the full dose until you are sure it wont affect you”

Flavor3%

“no candy flavoring or weird supplement theater”

Side Effects2%

“because the effects aren't always easily determined”

Vitamin2%

“Supplements are difficult to review”

Muscle Pain Relief2%

“Obviously hard to tell if it is affecting muscle strength and/or growth”

Taste-Overall1%

“They have no taste”

Certifications1%

“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/Swallowing1%

“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.