Nattokinase 100mg
Skip itBrand-locked demand (top 5 brands take 97% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Conversion
Incredible14.4%search→purchase rate — share of searches ending in a sale
Avg price
Great$20.85avg listing price — sweet spot $15–$100
Price range
Great$12.49–$31.81cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Okay$210K$210K/yr · 70K searches
Growth
Okay+9.8%90-day search growth — must beat 0% to launch
Review moat
Okay3,650.5avg incumbent reviews — the moat a new listing must climb
Quality gap
Bad4.6★avg incumbent rating — lower means beatable quality
Competition
Bad90%top-5 click share — a locked-up shelf
Brand share
Bad97%top-5 brand share — brand-locked demand
Is nattokinase 100mg profitable on Amazon?
According to Flapen's Amazon United States niche tracking, nattokinase 100mg is a $210K/yr Amazon United States market (70K searches/yr). The top 5 brands hold 97% of demand. Verdict: Skip it — 46/100.
Data updated Jul 26, 2026 · scored weekly · How we score niches
nattokinase 100mg market size & sales
Units sold, revenue, conversion and listing quality across the tracked shelf.- Units sold / yr
- 10K–13K
- avg 1,000–1,250/product
- Revenue / yr
- $209K–$261K
- units × avg price
- Conversion rate
- 14.4%
- Avg BSR
- #639
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 88%
- Out of stock
- 0.0%
- Avg brand age
- 56 months
- Avg seller age
- 173 days
Competition: brands, sellers & click share
The top 5 products capture 90% of clicks — a locked-up shelf that new listings rarely crack.Brands
6 falling
Sellers
28
Top-5 brand share
97%
Top 20: 100%
Top-5 click share
90%
Top 20: 100%
Open market
0%
- Doctor's BEST67%
- Nutricost13%
- Zenavea10%
- NOW Foods4%
- Double Wood Supplements3%
- BulkSupplements3%
nattokinase 100mg demand & seasonality
Weekly Amazon search volume, last 98 weeks — +9.8% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 2.2×
Top nattokinase 100mg search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.- nattokinase 2000 fu39K/yr
- doctors best nattokinase14K/yr
- nattokinase doctors best3K/yr
- doctors best nattokinase 2000 fu4K/yr
- dr best nattokinase3K/yr
- nattokinase 100mg4K/yr
- drs best nattokinase2K/yr
Top nattokinase 100mg 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.
All 8 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Doctors Best Nattokinase Non-GMO Vegan Gluten Free 270 Veggie Caps
Doctor's BEST$31.814.6★8,981 rev
Doctors Best Nattokinase 2000 FU Supplement for Men & Women - Supports Blood Flow Heart Health & Healthy Circulation Nattokinase Enzyme Sourced from Japanese Natto Capsule Form - 90 Veg Caps
Doctor's BEST$12.494.6★8,981 rev
Nutricost Nattokinase 2 000FU 120 Capsules - Gluten Free Non-GMO Vegetarian Friendly
Nutricost$14.614.7★2,590 rev
Zenavea - Nattokinase Supplement - 2000 FU of Enzyme - 270 Capsules of Nattokinase 100mg - Gluten Free Non-GMO Vegan
Zenavea$29.154.5★1,380 rev
Doctors Best Natto Serra for Men & Women - Nattokinase and Serrapeptase Enzyme Supplement Caps for Circulatory & Immune Health Support Optimal Digestive Absorption Non GMO Vegan - 90 Veg Capsules
Doctor's BEST$23.924.6★1,965 rev
Newest
by launch date
BulkSupplements.com Nattokinase 2000 FU Capsules - Sourced from Natto Extract Nattokinase Supplement Nattokinase 100mg - Gluten Free 1 Capsule per Serving 180 Capsules (Pack of 1)
BulkSupplements$19.51184 rev
Nattokinase Supplement 4 000 FU Servings 120 Capsules (Derived from Japanese Natto) Systemic Enzymes for Cardiovascular and Circulatory Support by Double Wood
Double Wood Supplements$18.993,538 rev
Nutricost Nattokinase 2 000FU 120 Capsules - Gluten Free Non-GMO Vegetarian Friendly
Nutricost$14.612,590 rev
Zenavea - Nattokinase Supplement - 2000 FU of Enzyme - 270 Capsules of Nattokinase 100mg - Gluten Free Non-GMO Vegan
Zenavea$29.151,380 rev
Doctors Best Natto Serra for Men & Women - Nattokinase and Serrapeptase Enzyme Supplement Caps for Circulatory & Immune Health Support Optimal Digestive Absorption Non GMO Vegan - 90 Veg Capsules
Doctor's BEST$23.921,965 rev
Trending
90-day click momentumDoctors Best Nattokinase Non-GMO Vegan Gluten Free 270 Veggie Caps
Doctor's BEST$31.814.6★
Doctors Best Natto Serra for Men & Women - Nattokinase and Serrapeptase Enzyme Supplement Caps for Circulatory & Immune Health Support Optimal Digestive Absorption Non GMO Vegan - 90 Veg Capsules
Doctor's BEST$23.924.6★
Zenavea - Nattokinase Supplement - 2000 FU of Enzyme - 270 Capsules of Nattokinase 100mg - Gluten Free Non-GMO Vegan
Zenavea$29.154.5★
Nutricost Nattokinase 2 000FU 120 Capsules - Gluten Free Non-GMO Vegetarian Friendly
Nutricost$14.614.7★
Nattokinase Supplement 4 000 FU Servings 120 Capsules (Derived from Japanese Natto) Systemic Enzymes for Cardiovascular and Circulatory Support by Double Wood
Double Wood Supplements$18.994.6★
What reviews say buyers love and hate about nattokinase 100mg
What buyers praise and complain about, mined from review topics.What buyers love
“The quality feels consistent”
“Best deal”
“Improved cholesterol levels”
“Great Supplements”
“blood pressure all good so far”
“as advertised”
“Very effective”
“No side effects”
“The recommended dosage should be:How to Use”
“Nattokinase is the best natural supplement for joints that are weak or sore”
What buyers complain about
“Doses far too low to do anything”
“Questionable ingredients”
“It didn't work for me”
“A waste of money”
“Misleading label claims”
“What heart attack”
“Bad quality control”
“About 2 that afternoon my ankles started tingling and burning”
“I always felt nauseous after taking it”
“still blood pressure was not improving”
Top return reasons
Common nattokinase 100mg questions
- Is nattokinase 100mg profitable to sell on Amazon United States?
- The niche generates $210K/yr across 8 tracked products. 90-day search growth is +9.8%. Flapen's verdict: Skip it (46/100).
- How competitive is the nattokinase 100mg niche?
- 6 brands and 28 sellers compete. The top 5 products take 90% of clicks and top 5 brands hold 97% of demand.
- What do buyers complain about in nattokinase 100mg?
- Top complaints mined from reviews: Dosage, Ingredients-Overall, Functionality-Overall. The return rate is 0.0%.
- When does demand for nattokinase 100mg peak?
- Demand is steady year-round — the busiest month runs 2.2× the quietest.
- What does it cost to enter the nattokinase 100mg niche?
- Listings span $12.49–$31.81; the average listing price is $20.85 (sweet spot $15–$100). The average incumbent carries 3,651 reviews — the moat a new listing must climb.