Mk4
MaybeAn estimated 0.1% of orders come back. But the products selling today already average 4.6★, so Mk4 is a Maybe.
- Flapen Score
- 51 / 100Top 40% of 14,768 Health & Household niches · +2 vs the category median of 4951
- Market size
- $262K/yr88K searches / yr
- 90-day growth
- +0.4%search demand this quarter
- Competition
- 70%top-5 click share · 13 brands · 42 sellers
Flapen Score
Mk4 against its category
The dotted line is the Health & Household average. Past it, Mk4 is stronger. Inside it, weaker.
Market
The Mk4 market on Amazon at a glance
Shoppers on Amazon United States searched for Mk4 88K times last year and spent an estimated $262K. The top 5 brands take 80% of clicks. Flapen scores it 51 out of 100, a Maybe.
01 · Demand
An estimated 9.4% of those searches ended in a purchase.
Shoppers searched for this 88K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 9.4% of those searches ended in a purchase. Searches in the last 90 days moved +0.4% against the 90 days before. Searches, conversion and average price together put the market at an estimated $262K a year.
- Searches, last 12 months
- 88K
- Growth, 90 days vs prior 90
- +0.4%
- Conversion, latest week
- 9.4%
- Market size, estimated
- $262Ka year
- Peak month
- May1.6× the quietest month
- Top search term
- mk419K searches a year
02 · Price
A sale here is worth $31.62.
Listings sell for $31.62 on average, from $9.70 to $73.59. Amazon reports units sold in ranges. This niche sold 8K to 10K a year. The average listing sells 500 to 750 of them. At $31.62 that is $16K to $24K a year per listing.
- Average price
- $31.62inside the $15 to $100 sweet spot
- Price range
- $9.70–$73.59
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 8K–10K
- Units per listing a year
- 500–750
- Revenue per listing a year
- $16K–$24K
- Returns
- 0.1%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is ads and reviews.
100% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #483 within Vitamin K1. It carries 2,452 reviews at 4.64 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 100%
- Prime listings
- 100%
- Out of stock, average day
- 0.0%
- Average rank
- #483in Vitamin K1
- Average rating
- 4.64 starsAmazon United States average 4.42 stars
- Average reviews
- 2,452per listing
- Listings tracked
- 16
04 · Newcomers
Brands here are established.
The brands on the shelf have sold for 74 months on average, so the names here are established.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 74 months
Products
Top Mk4 products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 29, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
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
- Price
- $25.46
- Rating
- 4.7/5
- Reviews
- 812
- Age
- 5y ago

Nutricost Vitamin K2 (MK4) 240 Capsules (100mcg) - Gluten Free and Non-GMO
- Price
- $14.61
- Rating
- 4.7/5
- Reviews
- 4,626
- Age
- 7y ago

Life Extension Super K Vitamin K Supplement 2000 Mcg Vitamin K and 1180 Mcg Vitamin K2 Heart Health Once-Daily 90 Softgels
- Price
- $19.39
- Rating
- 4.6/5
- Reviews
- 6,990
- Age
- 7y ago

Life Extension Low Dose Vitamin K2 Supports Arterial Health Non-GMO Gluten-Free 90 Softgels
- Price
- $11.11
- Rating
- 4.7/5
- Reviews
- 1,829
- Age
- 17y ago

Carlson - Vitamin K2 MK-4 (Menatetrenone) Vitamin K Supplement Bone & Heart Health K2 Vitamin Soy-free 60 capsules
- Price
- $20.51
- Rating
- 4.8/5
- Reviews
- 796
- Age
- 17y ago
Trending
estimated 90-day click momentum
AOR Peak K2 Vitamin K2 MK-4 90 Vegan Capsules 30-90 Day Supply Essential for Bone Structure
- Price
- $43.21
- Rating
- 4.6/5
- Reviews
- 140
- Age
- 15y ago

TACNEX OC/Mace Spray Holster for Duty Belt Pepper Spray Pouch MK3 MK4 Canister Holder Nylon Carry Case w/Top Flap Copper Snap MOLLE Strap for Police Security LE (Tall Nylon Pouch MK-4 and Similar)
- Price
- $13.79
- Rating
- 4.2/5
- Reviews
- 292
- Age
- 3y ago

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
- Price
- $73.59
- Rating
- 4.4/5
- Reviews
- 498
- Age
- 21y ago

InnovixLabs Full Spectrum Vitamin K2-90 Softgels with 600 mcg of Trans Form MK7 and MK4 - Supports General Health and Bone Strength - Soy and Gluten Free K2 Vitamin Supplement
- Price
- $26.23
- Rating
- 4.7/5
- Reviews
- 7,561
- Age
- 11y ago

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
- Price
- $25.46
- Rating
- 4.7/5
- Reviews
- 812
- Age
- 5y ago
Newest
by launch date
NBI Osteo-MK4 60 Capsules
- Price
- $65.42
- Rating
- 4.5/5
- Reviews
- 39
- Age
- 2y ago

Super Vitamin K Complex (K2 MK7 + MK4 & K1) 360 Coconut Oil Softgles | Easily Absorbed K Vitamins Active Menaquinone Complex | Non-GMO
- Price
- $24.60
- Rating
- 4.8/5
- Reviews
- 444
- Age
- 3y ago

Carlyle Vitamin K2 Supplement 100 mcg | K2 MK-4 | 240 Capsules
- Price
- $10.00
- Rating
- 4.7/5
- Reviews
- 1,269
- Age
- 3y ago

TACNEX OC/Mace Spray Holster for Duty Belt Pepper Spray Pouch MK3 MK4 Canister Holder Nylon Carry Case w/Top Flap Copper Snap MOLLE Strap for Police Security LE (Tall Nylon Pouch MK-4 and Similar)
- Price
- $13.79
- Rating
- 4.2/5
- Reviews
- 292
- Age
- 3y ago

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
- Price
- $25.46
- Rating
- 4.7/5
- Reviews
- 812
- Age
- 5y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 70% of clicks. A locked shelf that new listings rarely crack.
Brands
13 falling
Sellers
42
Est. top-5 brand share
80%
Top 20: 100%
Est. top-5 click share
70%
Top 20: 100%
Open market
16%
- Life Extension52%
- Nutricost11%
- Carlson7%
- THORNE5%
- NOW Foods5%
- InnovixLabs4%
- Open — no brand owns it (7 brands, 16%)
Demand
Mk4 search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.6×
Search terms
Top Mk4 search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- mk419K/yr
- vitamin k2 mk416K/yr
- k2 mk411K/yr
- life extension k211K/yr
- mk4 vitamin k26K/yr
- life extension vitamin k25K/yr
- life extension mega k24K/yr
- mk-44K/yr
- life extension k2 mk73K/yr
- mega k23K/yr
Reviews and returns
What reviews say buyers love and hate about Mk4
We read the reviews and the return reasons for every product selling here.
“Low dose is harder to find”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
20 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Mk4 questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









