Is l arginine profitable to sell on Amazon United States?

The niche generates $3.9M/yr across 27 tracked products. 90-day search growth is +2.8%. Flapen's verdict: Launch it (66/100).

How competitive is the l arginine niche?

17 brands and 65 sellers compete. The top 5 products take 56% of clicks and top 5 brands hold 70% of demand.

What do buyers complain about in l arginine?

Top complaints mined from reviews: Size-Overall, Dosage, Ease Of Chewing/Swallowing. The return rate is 0.0%.

When does demand for l arginine peak?

Demand is steady year-round — the busiest month runs 1.2× the quietest.

What does it cost to enter the l arginine niche?

Listings span $7.76–$47.79; the average listing price is $21.12 (sweet spot $15–$100). The average incumbent carries 9,642 reviews — the moat a new listing must climb.

L Arginine

Launch it

A $3.9M/yr market growing +2.8% this quarter with returns at 0.0% — clears our launch bar.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Market size

Incredible$3.9M

$3.9M/yr · 1.6M searches

Conversion

Great11.3%

search→purchase rate — share of searches ending in a sale

Avg price

Great$21.12

avg listing price — sweet spot $15–$100

Price range

Great$7.76–$47.79

cheapest to priciest tracked listing — scored on the share inside $15–$100

Brand share

Good70%

top-5 brand share — brands hold most of the demand

Competition

Okay56%

top-5 click share — leaders hold, buyers still browse

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Growth

Okay+2.8%

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

Review moat

Bad9,641.59

avg incumbent reviews — the moat a new listing must climb

Is l arginine profitable on Amazon?

According to Flapen's Amazon United States niche tracking, l arginine is a $3.9M/yr Amazon United States market (1.6M searches/yr). The top 5 brands hold 70% of demand. Verdict: Launch it — 66/100.

Data updated Jul 25, 2026 · scored weekly · How we score niches

l arginine market size & sales

Units sold, revenue, conversion and listing quality across the tracked shelf.

Units sold / yr: 150K–200K; avg 6,000–8,000/product
Revenue / yr: $3.2M–$4.2M; units × avg price
Conversion rate: 11.3%
Avg BSR: #139
Page quality: 0%
Prime: 100%
Sponsored: 81%
Out of stock: 0.5%
Avg brand age: 78 months
Avg seller age: 154 days

Competition: brands, sellers & click share

The top 5 products take 56% of clicks — established leaders, but buyers still shop beyond them.

Brands

17 rising

Sellers

Top-5 brand share

70%

Top 20: 100%

Top-5 click share

56%

Top 20: 93%

Open market

24%

HAVASU NUTRITION20%
NOW Foods15%
Nutricost15%
Nature's Bounty13%
Best Naturals7%
Pure Encapsulations7%

l arginine demand & seasonality

Weekly Amazon search volume, last 102 weeks — +2.8% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.2×

Open Trend

Top l arginine search terms shoppers use

The exact queries shoppers type, with yearly volume, growth and conversion.

l arginine518K/yr +1.5%9.8% conv.
l-arginine311K/yr -3.6%10.8% conv.
arginine197K/yr +27.3%7.8% conv.
l arginine supplements for men226K/yr -19.0%8.6% conv.
arginine supplement76K/yr +21.4%7.3% conv.
l arginine 1000mg32K/yr +54.1%8.5% conv.
l-arginine 1000mg19K/yr +51.9%14.3% conv.
larginine supplements for men34K/yr -12.8%8.3% conv.
arginina for men19K/yr +30.0%2.4% conv.
larginine27K/yr -4.4%8.5% conv.

All search terms

Top l arginine 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.

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

L-Arginine and L-Citrulline for Men Nitric Oxide Support 30 Servings

HAVASU NUTRITION$23.734.2★55,008 rev

Natures Bounty L-Arginine 1000mg for Supporting Blood Flow and Vascular Function Non-GMO Gluten Free 50 Tablets

Nature's Bounty$10.274.5★10,801 rev

NOW Foods Supplements L-Arginine 1 000 mg Nitric Oxide Precursor* Amino Acid 120 Tablets

NOW Foods$17.044.5★14,869 rev

Nutricost L-Arginine 1000mg Amino Acid Tablets (150 Tablets)

Nutricost$15.854.4★2,360 rev

(New Improved Formula) Best Naturals L-Arginine 1000 mg 120 Tablets - Pharmaceutical Grade L Arginine Supplement Promotes Nitric Oxide Synthesis

Best Naturals$9.694.6★8,148 rev

Newest

by launch date

Micro Ingredients L-Arginine 1000mg with MCT Oil 300 Softgels | Nitric Oxide Precursor* for Men & Women | Extra Strength Amino Acid Formula for Daily Wellness | Non-GMO Gluten Free No Soy

Micro Ingredients$15.69167 rev

1y ago

PRISTINES L Arginine 1000mg Capsule Supplements for Men & Women - 90 Day Supply Nitric Oxide & Pre Workout Amino Acid Support - Glass Bottle

PRISTINE'S$17.33431 rev

2y ago

BulkSupplements.com L-Arginine Capsules - Arginine Supplement Nitric Oxide Supplement - Gluten Free 8 Capsules per Serving (5000mg) 240 Count (Pack of 1)

BulkSupplements$16.98427 rev

2y ago

Horbach L-Arginine L-Citrulline Complex | 3000mg | 250 Capsules

Horbäach$20.241,217 rev

3y ago

Force Factor L-Arginine Nitric Oxide Supplement with BioPerine to Help Build Muscle and Support Stronger Blood Flow Circulation Nutrient Delivery and Pumps L-Arginine 3000mg 3g 150 Capsules

Force Factor$11.112,484 rev

5y ago

What reviews say buyers love and hate about l arginine

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

What buyers love

Quality-Overall19%

“High Quality & Easy to Take”

Value For Money9%

“really solid value for what you get”

Advertised Vs Actual Product7%

“As advertised”

Vitamin6%

“I absolutely love these vitamins”

Energy Level6%

“have more energy”

Blood Pressure5%

“Lowers my blood pressure”

Efficiency5%

“There are many benefits to taking this”

Ease Of Chewing/Swallowing5%

“chewing them into crumbs gets them into your system quicker”

Ingredients-Overall4%

“good quality ingredients”

Heart Health3%

“Good heart health”

What buyers complain about

Size-Overall17%

“the tablets are very large”

Dosage11%

“Have to take 5 pills for one serving”

Ease Of Chewing/Swallowing10%

“couldn't swallow them”

Taste-Overall6%

“Tastes terrible”

Functionality-Overall4%

“Sadly the second bottle also didnt work”

Side Effects4%

“made her feel worse”

Smell4%

“Has a rancid odor”

Vitamin3%

“This is the worst L-Arginine supplement ever”

Value For Money2%

“Poor value”

Quality-Overall2%

“it is cheap”

Top return reasons

Size-Overall22%

Value For Money11%

Quality-Overall11%

Heart Health11%

Fever Relief11%

Functionality-Overall11%

Advertised Vs Actual Product6%

Side Effects6%

Ease Of Chewing/Swallowing6%

Dosage6%

Common l arginine questions

Is l arginine profitable to sell on Amazon United States?: The niche generates $3.9M/yr across 27 tracked products. 90-day search growth is +2.8%. Flapen's verdict: Launch it (66/100).
How competitive is the l arginine niche?: 17 brands and 65 sellers compete. The top 5 products take 56% of clicks and top 5 brands hold 70% of demand.
What do buyers complain about in l arginine?: Top complaints mined from reviews: Size-Overall, Dosage, Ease Of Chewing/Swallowing. The return rate is 0.0%.
When does demand for l arginine peak?: Demand is steady year-round — the busiest month runs 1.2× the quietest.
What does it cost to enter the l arginine niche?: Listings span $7.76–$47.79; the average listing price is $21.12 (sweet spot $15–$100). The average incumbent carries 9,642 reviews — the moat a new listing must climb.