nattokinase
Worth a lookShows low returns (0.0%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Avg price
Great£18.43avg listing price — sweet spot $15–$100
Conversion
Great9.0%search→purchase rate — share of searches ending in a sale
Review moat
Great363.73avg incumbent reviews — the moat a new listing must climb
Price range
Great£5.69–£55.46cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Good£363K£363K/yr · 219K searches
Growth
Okay+19.2%90-day search growth — must beat 0% to launch
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Brand share
Okay87%top-5 brand share — brands hold most of the demand
Competition
Bad83%top-5 click share — a locked-up shelf
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.
Data updated Jul 25, 2026 · scored weekly · How we score niches
nattokinase market data
- Units sold / yr
- 25K–30K
- avg 2,000–2,500/product
- Revenue / yr
- £461K–£553K
- units × avg price
- Conversion rate
- 9.0%
- Avg BSR
- #41
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 91%
- Out of stock
- 0.0%
- Avg brand age
- 36 months
- Avg seller age
- 172 days
Competition & brand share
The top 5 products capture 83% of clicks — a locked-up shelf that new listings rarely crack.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%)
Demand & seasonality
Weekly Amazon search volume, last 103 weeks — +19.2% search growth over the last 90 days.Peak months: May, Jun · busiest ÷ quietest = 2.1×
Top nattokinase search terms
- nattokinase150K/yr
- nattokinase organic uk32K/yr
- nattokinase high strength14K/yr
- nattokinase enzyme nutritional supplements15K/yr
- nattokinase 10000 fu4K/yr
- nattokinase uk4K/yr
Top nattokinase 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.
All 11 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Hybrid Health Nattokinase 5000FU 250mg Supplement - 180 Vegan Capsules High Strength Japanese Natto Independently Third Party Lab Tested 3 Months Supply
Hybrid Health£8.214.4★414 rev
Nattokinase 5000 FU Capsules with Oregano & Motherwort | 3 Ingredient Formula for Arterial Support | 3rd Party Tested with Certificate of Analysis | Vegan | UK GMP Made | 30 Capsules (30)
Natural Foundation£27.744.4★121 rev
Vinco Nattokinase 200mg 4000FU 120 Capsules High Strength Japanese Natto Enzyme Supports Heart Health Blood Flow Circulation and Blood Pressure Non-GMO Gluten Free Made in UK
Vinco Supplements£7.994.4★505 rev
Nattokinase 2 000 FU per Capsule - High-Strength 240 Nattokinase Capsules from Fermented Natto Soybeans - 8 Months Supply - Non-GMO Natural & Vegan- Laboratory Tested - Raibu
RAIBU£16.014.4★2,235 rev
Nattokinase 10 000 FU per 3 Capsules - High-Strength 240 Nattokinase Capsules from Fermented Natto Soybeans with CoQ10 Turmeric Aged Garlic & Pine Bark Extract - 80-Day Supply
AuranC-H£22.974.7★5 rev
Newest
by launch dateNattokinase 10 000 FU per 3 Capsules - High-Strength 240 Nattokinase Capsules from Fermented Natto Soybeans with CoQ10 Turmeric Aged Garlic & Pine Bark Extract - 80-Day Supply
AuranC-H£22.975 rev
Nattokinase 5000 FU Capsules with Oregano & Motherwort | 3 Ingredient Formula for Arterial Support | 3rd Party Tested with Certificate of Analysis | Vegan | UK GMP Made | 90 Capsules (90)
Natural Foundation£55.46121 rev
Nattokinase 60 Capsules | 500 MG 6000 FU Per Capsule | 100% Natural Vegan | Protein Enzyme from Japanese Natto | New & Improved Formula | NEO NUTRITION
NEO-NUTRITION£8.1412 rev
Nattokinase 5000 FU Capsules with Oregano & Motherwort | 3 Ingredient Formula for Arterial Support | 3rd Party Tested with Certificate of Analysis | Vegan | UK GMP Made | 30 Capsules (30)
Natural Foundation£27.74121 rev
Vinco Nattokinase 200mg 4000FU 120 Capsules High Strength Japanese Natto Enzyme Supports Heart Health Blood Flow Circulation and Blood Pressure Non-GMO Gluten Free Made in UK
Vinco Supplements£7.99505 rev
Trending
90-day click momentumNattokinase 5000 FU Capsules with Oregano & Motherwort | 3 Ingredient Formula for Arterial Support | 3rd Party Tested with Certificate of Analysis | Vegan | UK GMP Made | 90 Capsules (90)
Natural Foundation£55.464.4★
Nattokinase 10 000 FU per 3 Capsules - High-Strength 240 Nattokinase Capsules from Fermented Natto Soybeans with CoQ10 Turmeric Aged Garlic & Pine Bark Extract - 80-Day Supply
AuranC-H£22.974.7★
Vitabay Nattokinase 2 000 FU High Strength 180 Vegan Softgel Capsules Liposomal Nattokinase from Fermented Soy No Vitamin K2 No Additives & Lab Tested 6 Month Supply
vitabay£15.874.6★
Nattokinase 60 Capsules | 500 MG 6000 FU Per Capsule | 100% Natural Vegan | Protein Enzyme from Japanese Natto | New & Improved Formula | NEO NUTRITION
NEO-NUTRITION£8.144.3★
Hybrid Health Nattokinase 5000FU 250mg Supplement - 180 Vegan Capsules High Strength Japanese Natto Independently Third Party Lab Tested 3 Months Supply
Hybrid Health£8.214.4★
What buyers say about nattokinase
What buyers praise and complain about, mined from review topics.What buyers love
“Seem good quality and the delivery was fast and efficient”
“Brilliant for blood pressure”
“Good price”
“Product as advertised”
“Noticing some positive effects 3 months in”
“so the ease of use for those with problems with swallowing is high”
“The best Nattokinase on the market works well”
“Good for the heart”
“Good price for 240 capsules of 2000 FU strength”
“Effectiveness of the suplement”
What buyers complain about
“Under dosed”
“Very expensive”
“Do not stop taken blood pressure tablets”
“It's deeply deceptive”
“Dont seem to make any difference”
“The only downside is that like many supplements in this category”
“Allergic reaction and filthy”
“Lab tested results are terrible”
“It caused gum bleeding”
“People buy it who have heart problems”
Common questions
- Is nattokinase profitable to sell on Amazon United Kingdom?
- The niche generates £363K/yr across 11 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is +19.2%. Flapen's verdict: Worth a look (56/100).
- How competitive is the nattokinase niche?
- 10 brands and 10 sellers compete. The top 5 products take 83% of clicks and top 5 brands hold 87% of demand.
- What do buyers complain about in nattokinase?
- Top complaints mined from reviews: Dosage, Value For Money, Blood Pressure. The return rate is 0.0%.
- When does demand for nattokinase peak?
- Demand peaks in May–Jun; the busiest month runs 2.1× the quietest.
- What does it cost to enter the nattokinase niche?
- Listings span £5.69–£55.46; the average listing price is £18.43 (sweet spot $15–$100). The average incumbent carries 364 reviews — the moat a new listing must climb.