---
title: "Vitamin K Complex — $794K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/vitamin-k-complex"
last_updated: "2026-08-09T20:13:57.103Z"
locale: en
meta:
description: "Niche score 48/100 · $794K/yr market · 189K searches/yr · $30.86 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 48/100 · $794K/yr market · 189K searches/yr · $30.86 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Vitamin K Complex — $794K/yr Amazon US Niche (2026) - Flapen"
---
# **vitamin k complex**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 73Growth 25Conversion 96Competition 9Returns 100Price range 89Avg price 95Brand share 0Review moat 34Quality gap 21
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****13.6%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Incredible****$30.86**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$9.92–$73.59**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Good****$794K**
$794K/yr · 189K searches
**Review moat**
**Okay****3,137.22**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-0.3%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Competition**
**Bad****90%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, vitamin k complex is a $794K/yr Amazon United States market (189K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 48/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **vitamin k complex market data**
- **Units sold / yr**
- **30K–40K**
- avg 3,000–4,000/product
- **Revenue / yr**
- **$926K–$1.2M**
- units × avg price
- **Conversion rate**
- **13.6%**
- **Avg BSR**
- **#143**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **84 months**
- **Avg seller age**
- **143 days**
## **Competition & brand share**
The top 5 products capture 90% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**5 **—flat
**Sellers**
**17**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**90%**
Top 20: 100%
**Open market**
**0%**
- Life Extension48% - THORNE43% - Bronson4% - NatureBell3% - Micro Ingredients2%
## **Demand**
Weekly Amazon search volume, last 51 weeks — -0.3% search growth over the last 90 days.
4K3KHoliday '25Spike '26Aug '25Oct '25Nov '25Jan '26Mar '26May '26
[**Open Trend **](https://flapen.com/research/us/health-household/vitamin-k-complex/trend)
## **Top vitamin k complex search terms**
- **super k**66K/yr-3.3%12.5% conv. - **thorne k2**19K/yr-6.0%12.3% conv. - **life extension super k**18K/yr-1.5%20.1% conv. - **thorne vitamin k**15K/yr+2.3%28.1% conv. - **vitamin k complex**12K/yr+8.2%5.0% conv. - **superk**10K/yr-3.2%1.8% conv. - **thorne vitamin k2**9K/yr-6.0%11.9% conv. - **vitamin c and k**5K/yr+33.7%0.7% conv. - **vitamin k1 and k2**6K/yr-1.0%6.5% conv. - **super k life extension**5K/yr+3.5%28.2% conv. [**All search terms **](https://flapen.com/research/us/health-household/vitamin-k-complex/search-terms)
## **Top vitamin k complex 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.
0%15%$119K30%$238K45%$357K60%$477K1001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 9 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Life Extension Super K Vitamin K Supplement 2000 Mcg Vitamin K and 1180 Mcg Vitamin K2 Heart Health Once-Daily 90 Softgels**Life Extension**$19.39**4.6★6,990 rev](https://www.amazon.com/dp/B07RL1J9BV) [2**THORNE - Vitamin K - Vitamins K1 and K2 (as MK-4 and MK-7) Capsule Supplement - Supports Strong Bones* - Clinically Studied Ingredients - Third-Party Certified - Gluten Dairy & Soy-Free - 60 Capsules**THORNE**$29.95**4.8★1,793 rev](https://www.amazon.com/dp/B0797N3F9T) [3**Life Extension Super K 150 Softgels with Vitamin K1 and K2 - MK4 & MK7**Life Extension**$37.74**4.8★1,155 rev](https://www.amazon.com/dp/B07TFBGDPH) [4**THORNE - Vitamin K2 - Concentrated Vitamin K2 (as MK-4) Liquid Supplement - Supports Bone Heart & and Blood Vessel Health* - Third-Party Certified - Gluten Dairy & Soy-Free - 1 Fl Oz**THORNE**$73.59**4.4★498 rev](https://www.amazon.com/dp/B000FGWDTK) [5**Bronson Vitamin K Triple Play (Vitamin K2 MK7 / Vitamin K2 MK4 / Vitamin K1) Full Spectrum Complex Vitamin K Supplement 90 Capsules**Bronson**$9.92**4.7★8,555 rev](https://www.amazon.com/dp/B01N6DWETQ)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Super Vitamin K Complex (K2 MK7 + MK4 & K1) 360 Coconut Oil Softgles | Easily Absorbed K Vitamins Active Menaquinone Complex | Non-GMO**Micro Ingredients**$24.60**444 rev3y ago](https://www.amazon.com/dp/B0C9PNMGR3) [**NatureBell Vitamin K Complex - 300 Softgels - Delivers 2 600mcg Vitamin K - Full Spectrum Bone & Heart Health Support Supplement - High Absorption K1 & K2 MK-4 & MK-7***NatureBell**$24.13**1,326 rev3y ago](https://www.amazon.com/dp/B0C6WWZ61Y) [**Life Extension Mega Vitamin K2 High Potency for Strong Bones clinically Studied 45 mg K2 Dosage Promotes Healthy Bone Density Gluten-Free Non-GMO 30 Capsules**Life Extension**$25.46**812 rev5y ago](https://www.amazon.com/dp/B08MR2D124) [**Life Extension Super K 150 Softgels with Vitamin K1 and K2 - MK4 & MK7**Life Extension**$37.74**1,155 rev7y ago](https://www.amazon.com/dp/B07TFBGDPH) [**Life Extension Super K Vitamin K Supplement 2000 Mcg Vitamin K and 1180 Mcg Vitamin K2 Heart Health Once-Daily 90 Softgels**Life Extension**$19.39**6,990 rev7y ago](https://www.amazon.com/dp/B07RL1J9BV)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Bronson Vitamin K Triple Play (Vitamin K2 MK7 / Vitamin K2 MK4 / Vitamin K1) Full Spectrum Complex Vitamin K Supplement 90 Capsules**Bronson**$9.92**4.7★**▲ 49%**](https://www.amazon.com/dp/B01N6DWETQ) [**Life Extension Mega Vitamin K2 High Potency for Strong Bones clinically Studied 45 mg K2 Dosage Promotes Healthy Bone Density Gluten-Free Non-GMO 30 Capsules**Life Extension**$25.46**4.7★**▲ 21%**](https://www.amazon.com/dp/B08MR2D124) [**Life Extension Super K 150 Softgels with Vitamin K1 and K2 - MK4 & MK7**Life Extension**$37.74**4.8★**▲ 21%**](https://www.amazon.com/dp/B07TFBGDPH) [**THORNE - Vitamin K - Vitamins K1 and K2 (as MK-4 and MK-7) Capsule Supplement - Supports Strong Bones* - Clinically Studied Ingredients - Third-Party Certified - Gluten Dairy & Soy-Free - 60 Capsules**THORNE**$29.95**4.8★**— 6%**](https://www.amazon.com/dp/B0797N3F9T) [**NatureBell Vitamin K Complex - 300 Softgels - Delivers 2 600mcg Vitamin K - Full Spectrum Bone & Heart Health Support Supplement - High Absorption K1 & K2 MK-4 & MK-7***NatureBell**$24.13**4.7★**— 5%**](https://www.amazon.com/dp/B0C6WWZ61Y)
**~~View all trending →~~**
## **What buyers say about vitamin k complex**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Vitamin**23%
*“It is a good brand vitamin”*
**Quality-Overall**22%
*“Great Product, Fills a real need”*
**Value For Money**7%
*“Great value”*
**Ease Of Chewing/Swallowing**5%
*“The liquid form makes it easier to consume”*
**Efficiency**4%
*“Works Well”*
**Dosage**3%
*“The dosage is a great balance”*
**Nutritional Content**3%
*“Excellent formulation combines Fat”*
**Ease Of Use**3%
*“Convenient”*
**Advertised Vs Actual Product**2%
*“Seems to be as described”*
**Heart Health**2%
*“my blood test showed an improvement in my bad cholesterol”*
### **What buyers complain about **
**Ease Of Use**11%
*“The dropper is very hard to use”*
**Dispensing Mechanism**11%
*“Hard to dispense”*
**Vitamin**9%
*“dangerous amount of Vitamin K. Now I am stuck with it since it cant be returned”*
**Dosage**7%
*“exact dosing is difficult”*
**Taste-Overall**7%
*“Doesn't taste like anything”*
**Value For Money**6%
*“Just a little more cost”*
**Side Effects**4%
*“There is side effects”*
**Functionality-Overall**3%
*“Didn't work for me, no stars, unfortunately”*
**Leak-Proof**3%
*“it arrived all leaky”*
**Quality-Overall**2%
*“Need better quality control”*
### **Top return reasons **
**Dilute/Watery**44%
**Strength**25%
**Quality-Overall**13%
**Leak-Proof**13%
**Advertised Vs Actual Product**6%
## **Common questions**
- **Is vitamin k complex profitable to sell on Amazon United States?**
- The niche generates $794K/yr across 9 tracked products. 90-day search growth is -0.3%. Flapen's verdict: Skip it (48/100).
- **How competitive is the vitamin k complex niche?**
- 5 brands and 17 sellers compete. The top 5 products take 90% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in vitamin k complex?**
- Top complaints mined from reviews: Ease Of Use, Dispensing Mechanism, Vitamin. The return rate is 0.0%.
- **What does it cost to enter the vitamin k complex niche?**
- Listings span $9.92–$73.59; the average listing price is $30.86 (sweet spot $15–$100). The average incumbent carries 3,137 reviews — the moat a new listing must climb.
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