---
title: "Nsk-sd — $6K/mo Amazon US Product Research (2026)"
canonical_url: "https://flapen.com/research/us/health-household/nsk-sd"
last_updated: "2026-08-12T05:13:10.694Z"
locale: en
meta:
description: "Amazon product research for nsk-sd: $6K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for nsk-sd: $6K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "Nsk-sd — $6K/mo Amazon US Product Research (2026)"
---
# **Nsk-sd**
**Worth a look**
Shows low returns (0.0%), but a small market ($75K/yr) keeps it on the watch list.
Market size 19Growth 58Conversion 74Competition 34Returns 100Price range 64Avg price 95Brand share 42Review moat 56Quality gap 25
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****$46.34**
avg listing price — sweet spot $15–$100
**Conversion**
**Good****6.9%**
search→purchase rate — share of searches ending in a sale
**Price range**
**Good****$14.61–$148.01**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Good****+32.5%**
90-day search growth — must beat 0% to launch
**Review moat**
**Good****1,247**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Okay****80%**
top-5 brand share — brands hold most of the demand
**Competition**
**Okay****65%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****$75K**
$75K/yr · 23K searches
## **Is nsk-sd profitable on Amazon?**
According to Flapen's Amazon United States niche tracking, nsk-sd is a $75K/yr Amazon United States market (23K searches/yr). The top 5 brands hold 80% of demand. Verdict: Worth a look — 51/100.
Data updated Jul 26, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **nsk-sd market size & sales**
Units sold, revenue, conversion and listing quality across the tracked shelf.
- **Units sold / yr**
- **2K–2K**
- avg 100–250/product
- **Revenue / yr**
- **$70K–$93K**
- units × avg price
- **Conversion rate**
- **6.9%**
- **Avg BSR**
- **#685**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **94%**
- **Out of stock**
- **0.4%**
- **Avg brand age**
- **62 months**
- **Avg seller age**
- **180 days**
## **Competition: brands, sellers & click share**
The top 5 products take 65% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**13 **▼falling
**Sellers**
**497**
**Top-5 brand share**
**80%**
Top 20: 100%
**Top-5 click share**
**65%**
Top 20: 100%
**Open market**
**16%**
- Pure Encapsulations36% - Source Naturals23% - Doctor's BEST8% - SFI Health7% - Double Wood Supplements6% - Allergy Research Group5% - Open — no brand owns it (7 brands, 16%)
## **nsk-sd demand & seasonality**
Weekly Amazon search volume, last 29 weeks — +32.5% search growth over the last 90 days.
900700Spike '26Jan '26Feb '26Mar '26Mar '26Apr '26May '26Jun '26
[**Open Trend **](https://flapen.com/research/us/health-household/nsk-sd/trend)
## **Top nsk-sd search terms shoppers use**
The exact queries shoppers type, with yearly volume, growth and conversion.
- **nsk-sd nattokinase**9K/yr+34.3%6.1% conv. - **nattokinase nsk-sd**6K/yr+37.4%5.3% conv. - **nsk-sd**5K/yr+32.4%7.9% conv. - **pure encapsulations nattokinase**4K/yr+22.7%4.9% conv. [**All search terms **](https://flapen.com/research/us/health-household/nsk-sd/search-terms)
## **Top nsk-sd 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%10%$7K20%$15K30%$22K40%$30K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 17 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Pure Encapsulations NSK-SD - 100 mg Nattokinase - for Normal Blood Circulation - Supports Fibrinolytic Activity* - Gluten Free & Non-GMO - 60 Capsules**Pure Encapsulations**$80.03**4.7★277 rev](https://www.amazon.com/dp/B0029X3KBM) [2**Source Naturals NSK-SD Nattokinase Systemic Enzyme for Healthy Circulation* 100mg - 60 Vegan Capsules**Source Naturals**$19.55**4.7★311 rev](https://www.amazon.com/dp/B000GFJK96) [3**Pure Encapsulations NSK-SD - 100 mg Nattokinase - for Normal Blood Circulation - Supports Fibrinolytic Activity* - Gluten Free & Non-GMO - 120 Capsules**Pure Encapsulations**$148.01**4.7★277 rev](https://www.amazon.com/dp/B00166DOMI) [4**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) [5**Klaire Labs SFI Health Nattokinase NSK-SD - Proteolytic Enzyme for Cardiovascular Support Dairy & Gluten-Free (60 Capsules)**SFI Health**$43.72**4.6★95 rev](https://www.amazon.com/dp/B00JVYRV8K)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Himalaya NSK-SD Nattokinase Dietary Supplement for Healthy Circulation Vegan Gluten Free Natto Extract 100 mg 60 Capsules**Himalaya**$51.69**42 rev1y ago](https://www.amazon.com/dp/B0F4Y19V3S) [**Nutrient Revolution NSK-SD Nattokinase - Cardiovascular Support - High Potency Nattokinase Supplement - Optimizes Circulation Non-GMO Vegetarian JHFA & JNKA Recognized - 60 Ct**Nutrient Revolution**$29.09**30 rev2y ago](https://www.amazon.com/dp/B0CVFBZKCM) [**Luma Nutrition Nattokinase Supplement - Natto 4000 FU Per Serving Premium Heart Health Support - Vegan & Gluten Free - 60 Capsules 30 Servings**Luma Nutrition**$19.75**1,584 rev2y ago](https://www.amazon.com/dp/B0CKZL4CXM) [**Source Naturals NSK-SD Nattokinase Vegetarian Friendly Whole Body Systemic Enzyme for Healthy Circulation* 200 mg - 60 Vegetarian Capsules**Source Naturals**$31.48**28 rev2y ago](https://www.amazon.com/dp/B0CHWN67S2) [**Source Naturals NSK-SD Nattokinase Vegetarian Friendly Whole Body Systemic Enzyme for Healthy Circulation* 200 mg - 30 Vegetarian Capsules**Source Naturals**$15.26**28 rev2y ago](https://www.amazon.com/dp/B0CHWN644Z)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Source Naturals NSK-SD Nattokinase Vegetarian Friendly Whole Body Systemic Enzyme for Healthy Circulation* 200 mg - 60 Vegetarian Capsules**Source Naturals**$31.48**4.9★**▲ 56%**](https://www.amazon.com/dp/B0CHWN67S2) [**Pure Encapsulations NSK-SD - 100 mg Nattokinase - for Normal Blood Circulation - Supports Fibrinolytic Activity* - Gluten Free & Non-GMO - 120 Capsules**Pure Encapsulations**$148.01**4.7★**▲ 49%**](https://www.amazon.com/dp/B00166DOMI) [**Allergy Research Group - Nattokinase Supplement NSK-SD 2000 FU 100mg - Cardiovascular/Circulatory Health - 60 Softgels**Allergy Research Group**$48.45**4.6★**▲ 31%**](https://www.amazon.com/dp/B003FGTM8M) [**Doctors Best Nattokinase Non-GMO Vegan Gluten Free 270 Veggie Caps**Doctor's BEST**$31.81**4.6★**▲ 16%**](https://www.amazon.com/dp/B0051M9DKU) [**Enzyme Science Nattokinase Pro with NSK-SD - Organic Supplement - Best enzymes for Cardiovascular and Circulatory Support - Vegan and Kosher - 60 Capsules**Enzyme Science**$44.24**4.3★**▲ 14%**](https://www.amazon.com/dp/B08D9RCDWK)
**~~View all trending →~~**
## **What reviews say buyers love and hate about nsk-sd**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**27%
*“The quality feels consistent”*
**Advertised Vs Actual Product**7%
*“AS DESCRIBED”*
**Value For Money**7%
*“Great value”*
**Heart Health**6%
*“Improved cholesterol levels”*
**Blood Pressure**6%
*“Blood pressure relief”*
**Efficiency**6%
*“Effective”*
**Vitamin**5%
*“Great vitamin”*
**Side Effects**4%
*“Have noticed an improvement in my health”*
**Dosage**2%
*“Great price per dose too”*
**Ease Of Chewing/Swallowing**2%
*“This nattokinase is easy to take”*
### **What buyers complain about **
**Dosage**14%
*“Need a little higher single capsule dosage”*
**Value For Money**9%
*“Price could be better”*
**Heart Health**8%
*“My cholesterol. bad”*
**Functionality-Overall**8%
*“Really hasnt done much for me”*
**Quality-Overall**5%
*“Bad quality control”*
**Ingredients-Overall**5%
*“Questionable ingredients”*
**Advertised Vs Actual Product**5%
*“Not All Is As It Seems”*
**Acid Regulator/Stomach Ache Relief**3%
*“Upset stomach”*
**Pain Relief-Overall**3%
*“About 2 that afternoon my ankles started tingling and burning”*
**Side Effects**3%
*“Can cause stomach issues”*
### **Top return reasons **
**Value For Money**33%
**Fever Relief**17%
**Leak-Proof**17%
**Quality-Overall**17%
**Thin**17%
## **Common nsk-sd questions**
- **Is nsk-sd profitable to sell on Amazon United States?**
- The niche generates $75K/yr across 17 tracked products. 90-day search growth is +32.5%. Flapen's verdict: Worth a look (51/100).
- **How competitive is the nsk-sd niche?**
- 13 brands and 497 sellers compete. The top 5 products take 65% of clicks and top 5 brands hold 80% of demand.
- **What do buyers complain about in nsk-sd?**
- Top complaints mined from reviews: Dosage, Value For Money, Heart Health. The return rate is 0.0%.
- **What does it cost to enter the nsk-sd niche?**
- Listings span $14.61–$148.01; the average listing price is $46.34 (sweet spot $15–$100). The average incumbent carries 1,247 reviews — the moat a new listing must climb.
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