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Vitamin K

Fail

Prices span $1.93–$15.74, mostly outside the sweet spot, so Vitamin K is a Fail.

Flapen Score
46
46 / 100
Ranks 1,173 of 2,035 Health & Personal Care niches · −2 vs the category median of 48
Market size
£454K/yr407K searches / yr
90-day growth
-29.7%search demand this quarter
Competition
69%top-5 click share · 16 brands · 17 sellers

Flapen Score

Vitamin K against its category

The dotted line is the Health & Personal Care average. Past it, Vitamin K is stronger. Inside it, weaker.

46Fail
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Vitamin K market on Amazon at a glance

Shoppers on Amazon United Kingdom searched for Vitamin K 407K times last year and spent an estimated £454K. The top 5 brands take 71% of clicks. Demand peaks in Aug–Sep. Flapen scores it 46 out of 100, a Fail.

01 · Demand

12.1% of searches ended in a purchase last week.

Shoppers searched for this 407K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. In the latest week, 12.1% of those searches ended in a purchase. Searches in the last 90 days moved -29.7% against the 90 days before. Searches, conversion and average price together put the market at an estimated £454K a year.

Searches, last 12 months
407K
Growth, 90 days vs prior 90
-29.7%
Conversion, latest week
12.1%
Market size, estimated
£454Ka year
Peak month
August5.1× the quietest month
Top search term
vitamin k2139K searches a year

02 · Price

A sale here is worth £9.23.

Listings sell for £9.23 on average, from £1.93 to £15.74. Amazon reports units sold in ranges. This niche sold 40K to 50K a year. The average listing sells 1,500 to 2,000 of them. At £9.23 that is £14K to £18K a year per listing.

Average price
£9.23under the $15 to $100 sweet spot
Price range
£1.93–£15.74
Amazon United Kingdom median price
£12.12across 27,606 niches
Units sold a year
40K–50K
Units per listing a year
1,500–2,000
Revenue per listing a year
£14K–£18K
Returns
0.1%of orders · Amazon United Kingdom median 0.6%

03 · Entry bar

The bar here is reviews.

76% 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 #185 within Vitamins. It carries 2,261 reviews at 4.59 stars, so a new listing needs social proof before a better product.

Sponsored listings
76%
Prime listings
100%
Out of stock, average day
0.0%
Average rank
#185in Vitamins
Average rating
4.59 starsAmazon United Kingdom average 4.36 stars
Average reviews
2,261per listing
Listings tracked
17

04 · Newcomers

Brands here are settling in.

The brands on the shelf have sold for 50 months on average, so the names here are settling in.

Launched, last 12 months
0
Successful launches
0Amazon's first-year sales bar
Average brand age
50 months

Products

Top Vitamin K products & what they sell for

Every tracked product: its share of the shelf, its reviews, and its price.

Competition

Competition: brands, sellers & click share

The top 5 products take 69% of clicks. Leaders hold, but buyers still shop past them.

£0£45K£91K£136K£182K1101001K10K100K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

16 falling

Sellers

17

Top-5 brand share

71%

Top 20: 100%

Top-5 click share

69%

Top 20: 100%

Open market

25%

  • WeightWorld25%
  • Nutrition Geeks17%
  • EVO NUTRITION14%
  • Carlyle9%
  • ALPHA016%
  • Horbäach5%

Demand

Vitamin K search demand

Weekly searches over the year, seasonality beneath. Pick a range.

60K40KSpike '24Spike '25Black Friday '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Aug, Sep · busiest ÷ quietest = 5.1×

Search terms

Top Vitamin K search terms shoppers use

The exact words shoppers type, with yearly volume, growth, and conversion.

  • vitamin k2139K/yr
  • k2 vitamin supplements63K/yr
  • vitamin k51K/yr
  • vitamin k2 mk731K/yr
  • k2 mk722K/yr
  • vitamin k2 high strength13K/yr
  • vit k211K/yr
  • k2 vitamin10K/yr
  • vit k4K/yr
  • vit k2 mk74K/yr

Reviews and returns

What reviews say buyers love and hate about Vitamin K

What buyers praise, what they complain about and why they send it back, from the reviews.

Complain

Dosage13%−0.05

it looks as if the dosage is very high

Not accurate dosage

High dose can cause health issues

Size-Overall9%+0.32

First of all the cap doesnt fit the bottle

Small size

The tablets are small

Vitamin9%+0.10

Not the right type of Vitamin D for me I guess

Must have been severely deficient in vitamin D

my vitamin D levels were low

Functionality-Overall5%−0.05

Not working

No effect

Its like the system just stopped dipping

Advertised Vs Actual Product5%+0.17

Other brands are misleading

Misleading

Falsely advertise dosage

Love

Quality-Overall19%+0.91

Good quality and easy to swallow

Excellent product

the capsules feel high quality

Value For Money17%+1.19

Good price

Good value for the money

Good value for money

Vitamin16%+0.10

Healthy vitamin

Excellent vitamins

As described good value vitamins

Ease Of Chewing/Swallowing11%+0.77

Easy to swallow

Perfect for people who struggle to swallow them

Perfect for people like myself who struggle to swallow tablets

Advertised Vs Actual Product5%+0.17

As advertised

As described

Exactly as Advertised

Return

0.1% Return rate 0% Fixable by listing

Vitamin100%█▁▁▁▁▁

Not the right type of Vitamin D for me I guess

Must have been severely deficient in vitamin D

my vitamin D levels were low

FAQ

Common Vitamin K questions

Answered from the same tracked data.