Is l-carnitine 1000mg capsules profitable to sell on Amazon United States?

The niche generates $351K/yr across 14 tracked products. 90-day search growth is +5.8%. Flapen's verdict: Worth a look (50/100).

How competitive is the l-carnitine 1000mg capsules niche?

7 brands and 22 sellers compete. The top 5 products take 70% of clicks and top 5 brands hold 95% of demand.

When does demand for l-carnitine 1000mg capsules peak?

Demand peaks in May–Jun; the busiest month runs 2.1× the quietest.

What does it cost to enter the l-carnitine 1000mg capsules niche?

Listings span $9.65–$50.60; the average listing price is $22.69 (sweet spot $15–$100). The average incumbent carries 2,876 reviews — the moat a new listing must climb.

L-carnitine 1000mg Capsules

Worth a look

Shows low returns (0.0%), but brand-locked demand (top 5 brands take 95% of clicks) keeps it on the watch list.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Avg price

Great$22.69

avg listing price — sweet spot $15–$100

Price range

Great$9.65–$50.60

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

Conversion

Great9.3%

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

Market size

Good$351K

$351K/yr · 167K searches

Review moat

Okay2,876.14

avg incumbent reviews — the moat a new listing must climb

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Growth

Okay+5.8%

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

Competition

Okay70%

top-5 click share — a locked-up shelf

Brand share

Bad95%

top-5 brand share — brand-locked demand

Is l-carnitine 1000mg capsules profitable on Amazon?

According to Flapen's Amazon United States niche tracking, l-carnitine 1000mg capsules is a $351K/yr Amazon United States market (167K searches/yr). The top 5 brands hold 95% of demand. Demand peaks in May–Jun. Verdict: Worth a look — 50/100.

Data updated Jul 10, 2026 · scored weekly · How we score niches

l-carnitine 1000mg capsules market size & sales

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

Units sold / yr: 15K–20K; avg 1,250–1,500/product
Revenue / yr: $340K–$454K; units × avg price
Conversion rate: 9.3%
Avg BSR: #158
Page quality: 0%
Prime: 100%
Sponsored: 79%
Out of stock: 0.0%
Avg brand age: 86 months
Avg seller age: 168 days

Competition: brands, sellers & click share

The top 5 products capture 70% of clicks — a locked-up shelf that new listings rarely crack.

Brands

7 falling

Sellers

Top-5 brand share

95%

Top 20: 100%

Top-5 click share

70%

Top 20: 100%

Open market

Nutricost52%
NOW Foods21%
BulkSupplements17%
Carlyle3%
Best Naturals3%
Pure Encapsulations3%
Open — no brand owns it (1 brand, 2%)

l-carnitine 1000mg capsules demand & seasonality

Weekly Amazon search volume, last 104 weeks — +5.8% search growth over the last 90 days.

Peak months: May, Jun · busiest ÷ quietest = 2.1×

Open Trend

Top l-carnitine 1000mg capsules search terms shoppers use

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

l carnitine tartrate53K/yr +7.7%9.4% conv.
l carnitine 1000mg28K/yr +9.2%7.2% conv.
l-carnitine tartrate20K/yr -6.2%9.2% conv.
l-carnitine l-tartrate15K/yr +5.9%8.7% conv.
l-carnitine 1000mg11K/yr +26.5%8.9% conv.
l carnitine l tartrate13K/yr -8.0%9.2% conv.
l-carnitine 1000mg capsules7K/yr -9.7%2.0% conv.
now l carnitine5K/yr +8.4%6.1% conv.
carnitine tartrate4K/yr -2.2%10.2% conv.
l carnitine now3K/yr +22.3%7.2% conv.

All search terms

Top l-carnitine 1000mg capsules 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 14 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Nutricost L-Carnitine Tartrate 1 000mg 240 Capsules - 500mg Per Capsule 120 Servings

Nutricost$19.674.6★4,208 rev

NOW Foods Supplements L-Carnitine 1 000 mg Purest Form Amino Acid Fitness Support* 100 Tablets

NOW Foods$26.234.6★5,550 rev

BulkSupplements.com L-Carnitine L-Tartrate Capsules - Carnitine Supplement L Carnitine 1000mg Capsules - L-Carnitine Tartrate Gluten Free - 2 Capsules per Serving 360 Capsules (Pack of 1)

BulkSupplements$23.624.5★346 rev

NOW Foods Supplements L-Carnitine 1 000 mg Purest Form Carnipure Amino Acid Fitness Support Tablets 150 Count

NOW Foods$41.374.7★265 rev

Nutricost L-Carnitine Tartrate Powder (250 Grams) - 1 Gram per Serving 250 Servings

Nutricost$23.634.5★3,161 rev

Newest

by launch date

NOW Foods Supplements L-Carnitine 1 000 mg Purest Form Carnipure Amino Acid Fitness Support Tablets 150 Count

NOW Foods$41.37265 rev

2y ago

BulkSupplements.com L-Carnitine 1000mg Capsules - Carnitine Supplement Amino Acid Supplement - Gluten Free 2 Capsules per Serving (1000mg) 240 Count (Pack of 1)

BulkSupplements$20.69330 rev

3y ago

BulkSupplements.com L-Carnitine L-Tartrate Capsules - Carnitine Supplement L Carnitine 1000mg Capsules - L-Carnitine Tartrate Gluten Free - 2 Capsules per Serving 360 Capsules (Pack of 1)

BulkSupplements$23.62346 rev

3y ago

Carlyle$18.98308 rev

4y ago

NaturaLife Labs Acetyl L-Carnitine (ALCAR) 1500 mg per Serving 100 Capsules Non-GMO Gluten-Free Vegan

NaturaLife Labs$16.8813,578 rev

7y ago

Common l-carnitine 1000mg capsules questions

Is l-carnitine 1000mg capsules profitable to sell on Amazon United States?: The niche generates $351K/yr across 14 tracked products. 90-day search growth is +5.8%. Flapen's verdict: Worth a look (50/100).
How competitive is the l-carnitine 1000mg capsules niche?: 7 brands and 22 sellers compete. The top 5 products take 70% of clicks and top 5 brands hold 95% of demand.
When does demand for l-carnitine 1000mg capsules peak?: Demand peaks in May–Jun; the busiest month runs 2.1× the quietest.
What does it cost to enter the l-carnitine 1000mg capsules niche?: Listings span $9.65–$50.60; the average listing price is $22.69 (sweet spot $15–$100). The average incumbent carries 2,876 reviews — the moat a new listing must climb.