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50

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.

Market size 53Growth 32Conversion 84Competition 25Returns 100Price range 85Avg price 94Brand share 11Review moat 36Quality gap 35

Returns

Incredible0.0%

return rate — above 6% 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

Competition

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

Brands

7 falling

Sellers

22

Top-5 brand share

95%

Open market

2%

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

Product shelf

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%10%$35K20%$70K30%$105K40%$140K1001K10K100K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 14 tracked products in this niche — three views at once, no toggling.

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +5.8% search growth over the last 90 days.
4K3KSpike '25Prime Day '25SepDecMarJunAugNovMarMay

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