---
title: "Nattokinase 100mg — $17K/mo Amazon US Product Research"
canonical_url: "https://flapen.com/research/us/health-household/nattokinase-100mg"
last_updated: "2026-08-12T11:12:25.716Z"
locale: en
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description: "Amazon product research for nattokinase 100mg: $17K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for nattokinase 100mg: $17K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "Nattokinase 100mg — $17K/mo Amazon US Product Research"
---
# **Nattokinase 100mg**
**Skip it**
Brand-locked demand (top 5 brands take 97% of clicks) — this niche doesn't clear our bar today.
Market size 41Growth 37Conversion 96Competition 8Returns 100Price range 85Avg price 90Brand share 7Review moat 28Quality gap 24
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****14.4%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$20.85**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$12.49–$31.81**
cheapest 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**
**Okay****3,650.5**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.6★**
avg incumbent rating — lower means beatable quality
**Competition**
**Bad****90%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****97%**
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 ~~](https://flapen.com/research/methodology)
## **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.
3K2KSpike '24Holiday '24Spike '25Holiday '25Spike '26 seasonDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 2.2×
[**Open Trend **](https://flapen.com/research/us/health-household/nattokinase-100mg/trend)
## **Top nattokinase 100mg search terms shoppers use**
The exact queries shoppers type, with yearly volume, growth and conversion.
- **nattokinase 2000 fu**39K/yr+17.6%8.7% conv. - **doctors best nattokinase**14K/yr+9.0%14.0% conv. - **nattokinase doctors best**3K/yr+6.7%15.4% conv. - **doctors best nattokinase 2000 fu**4K/yr+2.7%24.4% conv. - **dr best nattokinase**3K/yr-1.7%11.4% conv. - **nattokinase 100mg**4K/yr-12.8%8.2% conv. - **drs best nattokinase**2K/yr-23.6%11.7% conv. [**All search terms **](https://flapen.com/research/us/health-household/nattokinase-100mg/search-terms)
## **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.
0%15%$31K30%$63K45%$94K60%$126K1001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 8 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Doctors Best Nattokinase Non-GMO Vegan Gluten Free 270 Veggie Caps**Doctor's BEST**$31.81**4.6★8,981 rev](https://www.amazon.com/dp/B0051M9DKU) [2**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**$12.49**4.6★8,981 rev](https://www.amazon.com/dp/B000BD0RRM) [3**Nutricost Nattokinase 2 000FU 120 Capsules - Gluten Free Non-GMO Vegetarian Friendly**Nutricost**$14.61**4.7★2,590 rev](https://www.amazon.com/dp/B09LRLLGCZ) [4**Zenavea - Nattokinase Supplement - 2000 FU of Enzyme - 270 Capsules of Nattokinase 100mg - Gluten Free Non-GMO Vegan**Zenavea**$29.15**4.5★1,380 rev](https://www.amazon.com/dp/B091C3GDLY) [5**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**$23.92**4.6★1,965 rev](https://www.amazon.com/dp/B00DBEVTDE)
**~~View all top sellers →~~**
### **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**$19.51**184 rev2y ago](https://www.amazon.com/dp/B0CYQWN6R1) [**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**$18.99**3,538 rev4y ago](https://www.amazon.com/dp/B0B6CQ9ZVJ) [**Nutricost Nattokinase 2 000FU 120 Capsules - Gluten Free Non-GMO Vegetarian Friendly**Nutricost**$14.61**2,590 rev4y ago](https://www.amazon.com/dp/B09LRLLGCZ) [**Zenavea - Nattokinase Supplement - 2000 FU of Enzyme - 270 Capsules of Nattokinase 100mg - Gluten Free Non-GMO Vegan**Zenavea**$29.15**1,380 rev4y ago](https://www.amazon.com/dp/B091C3GDLY) [**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**$23.92**1,965 rev13y ago](https://www.amazon.com/dp/B00DBEVTDE)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Doctors Best Nattokinase Non-GMO Vegan Gluten Free 270 Veggie Caps**Doctor's BEST**$31.81**4.6★**▲ 26%**](https://www.amazon.com/dp/B0051M9DKU) [**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**$23.92**4.6★**— 8%**](https://www.amazon.com/dp/B00DBEVTDE) [**Zenavea - Nattokinase Supplement - 2000 FU of Enzyme - 270 Capsules of Nattokinase 100mg - Gluten Free Non-GMO Vegan**Zenavea**$29.15**4.5★**— 6%**](https://www.amazon.com/dp/B091C3GDLY) [**Nutricost Nattokinase 2 000FU 120 Capsules - Gluten Free Non-GMO Vegetarian Friendly**Nutricost**$14.61**4.7★**— 0%**](https://www.amazon.com/dp/B09LRLLGCZ) [**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**$18.99**4.6★**— 10%**](https://www.amazon.com/dp/B0B6CQ9ZVJ)
**~~View all trending →~~**
## **What reviews say buyers love and hate about nattokinase 100mg**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**27%
*“The quality feels consistent”*
**Value For Money**9%
*“Best deal”*
**Heart Health**6%
*“Improved cholesterol levels”*
**Vitamin**6%
*“Great Supplements”*
**Blood Pressure**6%
*“blood pressure all good so far”*
**Advertised Vs Actual Product**5%
*“as advertised”*
**Efficiency**5%
*“Very effective”*
**Side Effects**4%
*“No side effects”*
**Dosage**3%
*“The recommended dosage should be:How to Use”*
**Joint Pain**3%
*“Nattokinase is the best natural supplement for joints that are weak or sore”*
### **What buyers complain about **
**Dosage**13%
*“Doses far too low to do anything”*
**Ingredients-Overall**12%
*“Questionable ingredients”*
**Functionality-Overall**8%
*“It didn't work for me”*
**Value For Money**7%
*“A waste of money”*
**Advertised Vs Actual Product**6%
*“Misleading label claims”*
**Heart Health**5%
*“What heart attack”*
**Quality-Overall**5%
*“Bad quality control”*
**Pain Relief-Overall**3%
*“About 2 that afternoon my ankles started tingling and burning”*
**Acid Regulator/Stomach Ache Relief**3%
*“I always felt nauseous after taking it”*
**Blood Pressure**3%
*“still blood pressure was not improving”*
### **Top return reasons **
**Value For Money**40%
**Leak-Proof**20%
**Side Effects**20%
**Joint Pain**20%
## **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.
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