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Nattokinase

Nattokinase shows low returns (0.0%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Flapen Score

56
Worth a look
Market size 54Growth 49Conversion 83Competition 14Returns 100Price range 80Avg price 84Brand share 30Review moat 82Quality gap 45
This niche Category average

Is Nattokinase profitable on Amazon?

According to Flapen's Amazon United Kingdom niche tracking, Nattokinase is a £363K/yr Amazon United Kingdom market (219K searches/yr). The top 5 brands hold 87% of demand. Demand peaks in May–Jun. Verdict: Worth a look — 56/100.

Nattokinase: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Worth a look. Search demand moved +19.2% over the last 90 days and 9.0% of searches end in a purchase.

£363K

revenue / yr

Units sold / yr30K
Search volume / yr+19.2%219K
Conversion rate9.0%
Avg price£18.43

Who owns the niche?

The top 5 brands hold 87% of demand, so 13% of the market is open.

13%

open market share

Brands · sellers10 · 10
Top-5 product click share83%
Open market13%
Avg brand age36 months

Is there a way in?

Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.5★ — the gap to enter on.

0/100

page quality · 11 products

Sponsored placement91%
New entrants (1y)3· 1 succeeded
Avg rating4.5★
Avg reviews364

Top Nattokinase products & what they sell for

Every tracked product — its share of the shelf, its review moat, and what it sells for.

Competition: brands, sellers & click share

The top 5 products capture 83% of clicks — a locked-up shelf that new listings rarely crack.

£0£36K£73K£109K£145K1101001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

10 falling

Sellers

10

Top-5 brand share

87%

Top 20: 100%

Top-5 click share

83%

Top 20: 100%

Open market

10%

  • Hybrid Health36%
  • Natural Foundation22%
  • Vinco Supplements15%
  • RAIBU11%
  • AuranC-H3%
  • ECO-VITS3%
  • Open — no brand owns it (4 brands, 10%)

Nattokinase demand & seasonality

Weekly search volume, with the niche's key stats alongside.

Volume219KCVR9.0%Products11Brands10Top 5 Brands87%OOS Rate0.0%Rating4.5★Reviews364Avg BSR#41
7K5KSpike '24Holiday '24Spike '25Prime Day '25Black Friday '25Spike '26DecMarJunAugNovMarMay

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

Top Nattokinase search terms shoppers use

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

  • nattokinase150K/yr
  • nattokinase organic uk32K/yr
  • nattokinase high strength14K/yr
  • nattokinase enzyme nutritional supplements15K/yr
  • nattokinase 10000 fu4K/yr
  • nattokinase uk4K/yr

What reviews say buyers love and hate about Nattokinase

What buyers mention most, as a share of all reviews.

What buyers love

79% of reviews
Quality-Overall21%

Seem good quality and the delivery was fast and efficient

Blood Pressure12%

Brilliant for blood pressure

Value For Money10%

Good price

Advertised Vs Actual Product7%

Product as advertised

Side Effects6%

Noticing some positive effects 3 months in

What buyers complain about

70% of reviews
Dosage27%

Under dosed

Value For Money9%

Very expensive

Blood Pressure8%

Do not stop taken blood pressure tablets

Advertised Vs Actual Product7%

It's deeply deceptive

Functionality-Overall6%

Dont seem to make any difference

Common Nattokinase questions

The questions sellers ask about this niche, answered from the tracked metrics.

Flapen scores Nattokinase 56/100 on Amazon United Kingdom — Worth a look. The niche generates £363K/yr across 11 tracked products. 1 of 3 products launched in the last 360 days are still selling. Search demand moved +19.2% over the last 90 days.
Search demand for Nattokinase on Amazon United Kingdom peaks in May–Jun, where the busiest month runs 2.1× the quietest.