Is l citrulline profitable to sell on Amazon Singapore?

The niche generates $4K/yr across 6 tracked products. 90-day search growth is +18.3%. Flapen's verdict: Skip it (42/100).

How competitive is the l citrulline niche?

6 brands and 4 sellers compete. The top 5 products take 93% of clicks and top 5 brands hold 93% of demand.

What does it cost to enter the l citrulline niche?

Listings span $24.20–$49.55; the average listing price is $31.34 (sweet spot $15–$100). The average incumbent carries 4,344 reviews — the moat a new listing must climb.

l citrulline

Skip it

A small market ($4K/yr) — this niche doesn't clear our bar today.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Avg price

Incredible$31.34

avg listing price — sweet spot $15–$100

Price range

Incredible$24.20–$49.55

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

Conversion

Good4.7%

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

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Growth

Okay+18.3%

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

Review moat

Bad4,343.83

avg incumbent reviews — the moat a new listing must climb

Brand share

Bad93%

top-5 brand share — brand-locked demand

Competition

Bad93%

top-5 click share — a locked-up shelf

Market size

Bad$4K

$4K/yr · 3K searches

According to Flapen's Amazon Singapore niche tracking, l citrulline is a $4K/yr Amazon Singapore market (3K searches/yr). The top 5 brands hold 93% of demand. Verdict: Skip it — 42/100.

Data updated Jul 24, 2026 · scored weekly · How we score niches

l citrulline market data

Units sold / yr: 100–250; avg 0–100/product
Revenue / yr: $3K–$8K; units × avg price
Conversion rate: 4.7%
Avg BSR: #135
Page quality: 0%
Prime: 67%
Sponsored: 17%
Out of stock: 10.1%
Avg brand age: 89 months
Avg seller age: 0 days

Competition & brand share

The top 5 products capture 93% of clicks — a locked-up shelf that new listings rarely crack.

Brands

6 falling

Sellers

Top-5 brand share

93%

Top 20: 100%

Top-5 click share

93%

Top 20: 100%

Open market

Horbäach38%
Nutricost23%
BulkSupplements13%
Now Foods9%
Doctor's Best9%
Snap Supplements7%
Open — no brand owns it (0%)

Demand

Weekly Amazon search volume, last 43 weeks — +18.3% search growth over the last 90 days.

Open Trend

Top l citrulline search terms

l citrulline1K/yr +7.7%1.6% conv.
l-citrulline929/yr +28.6%2.3% conv.
citrulline805/yr +22.6%2.6% conv.

All 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 6 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

L Citrulline 2400 mg per Serving | 180 Capsules | Maximum Strength Free Form Amino Acid | Non-GMO Gluten Free L-Citrulline Supplement | by Horbaach

Horbäach$25.364.5★1,431 rev

Nutricost L-Citrulline 2500mg Per Serving 60 Servings 1250mg Per Tablet 120 Tabs - Non-GMO and Gluten Free Supplement

Nutricost$24.204.5★1,055 rev

BulkSupplements.com L-Citrulline Powder - Citrulline Supplement Citrulline Pharmaceutical Grade Citrulline Powder - Citrulline 3000mg 3g per Servings 333 Servings 1kg (2.2 lbs)

BulkSupplements$49.554.6★4,193 rev

NOW Supplements L-Citrulline Pure Powder Supports Protein Metabolism* 4-Ounce

Now Foods$25.444.2★318 rev

Doctors Best L-Citrulline Non-GMO Vegan Gluten Free Soy Free 200g

Doctor's Best$26.384.4★806 rev

Newest

by launch date

Nutricost L-Citrulline 2500mg Per Serving 60 Servings 1250mg Per Tablet 120 Tabs - Non-GMO and Gluten Free Supplement

Nutricost$24.201,055 rev

4y ago

L Citrulline 2400 mg per Serving | 180 Capsules | Maximum Strength Free Form Amino Acid | Non-GMO Gluten Free L-Citrulline Supplement | by Horbaach

Horbäach$25.361,431 rev

6y ago

Nitric Oxide Booster by Snap Supplements - Pre Workout Muscle Builder - L Arginine L Citrulline 1500mg Formula Tribulus Extract & Panax Ginseng Strength & Endurance 60 Capsules

Snap Supplements$37.1018,260 rev

7y ago

Doctors Best L-Citrulline Non-GMO Vegan Gluten Free Soy Free 200g

Doctor's Best$26.38806 rev

10y ago

BulkSupplements.com L-Citrulline Powder - Citrulline Supplement Citrulline Pharmaceutical Grade Citrulline Powder - Citrulline 3000mg 3g per Servings 333 Servings 1kg (2.2 lbs)

BulkSupplements$49.554,193 rev

11y ago

Common questions

Is l citrulline profitable to sell on Amazon Singapore?: The niche generates $4K/yr across 6 tracked products. 90-day search growth is +18.3%. Flapen's verdict: Skip it (42/100).
How competitive is the l citrulline niche?: 6 brands and 4 sellers compete. The top 5 products take 93% of clicks and top 5 brands hold 93% of demand.
What does it cost to enter the l citrulline niche?: Listings span $24.20–$49.55; the average listing price is $31.34 (sweet spot $15–$100). The average incumbent carries 4,344 reviews — the moat a new listing must climb.