Vitamin D Test Kit
FailPrices span $4.88–$8.48, mostly outside the sweet spot, so Vitamin D Test Kit is a Fail.
- Flapen Score
- 36 / 100Ranks 1,876 of 2,035 Health & Personal Care niches · −12 vs the category median of 4836
- Market size
- £21K/yr39K searches / yr
- 90-day growth
- -41.3%search demand this quarter
- Competition
- 93%top-5 click share · 6 brands · 10 sellers
Flapen Score
Vitamin D Test Kit against its category
The dotted line is the Health & Personal Care average. Past it, Vitamin D Test Kit is stronger. Inside it, weaker.
Market
The Vitamin D Test Kit market on Amazon at a glance
Shoppers on Amazon United Kingdom searched for Vitamin D Test Kit 39K times last year and spent an estimated £21K. The top 5 brands take 97% of clicks. Demand peaks in Jan–Feb–Mar. Flapen scores it 36 out of 100, a Fail.
01 · Demand
An estimated 8.4% of those searches ended in a purchase.
Shoppers searched for this 39K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 8.4% of those searches ended in a purchase. Searches in the last 90 days moved -41.3% against the 90 days before. Searches, conversion and average price together put the market at an estimated £21K a year.
- Searches, last 12 months
- 39K
- Growth, 90 days vs prior 90
- -41.3%
- Conversion, latest week
- 8.4%
- Market size, estimated
- £21Ka year
- Peak month
- February3.9× the quietest month
- Top search term
- vitamin d test kit19K searches a year
02 · Price
A sale here is worth £6.34.
Listings sell for £6.34 on average, from £4.88 to £8.48. Amazon reports units sold in ranges. This niche sold 3K to 4K a year. The average listing sells 250 to 500 of them. At £6.34 that is £2K to £3K a year per listing.
- Average price
- £6.34under the $15 to $100 sweet spot
- Price range
- £4.88–£8.48
- Amazon United Kingdom median price
- £12.12across 27,606 niches
- Units sold a year
- 3K–4K
- Units per listing a year
- 250–500
- Revenue per listing a year
- £2K–£3K
- Returns
- 0.2%of orders · Amazon United Kingdom median 0.6%
03 · Entry bar
The bar here is low.
43% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 1.5% of listings are out of stock. The average listing ranks #243 within Medical Supplies & Equipment. It carries 186 reviews at 3.83 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 43%
- Prime listings
- 100%
- Out of stock, average day
- 1.5%
- Average rank
- #243in Medical Supplies & Equipment
- Average rating
- 3.83 starsAmazon United Kingdom average 4.36 stars
- Average reviews
- 186per listing
- Listings tracked
- 7
04 · Newcomers
Brands here are settling in.
The brands on the shelf have sold for 53 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
- 53 months
Products
Top Vitamin D Test Kit 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 24, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Vitamin D Test Kit - Check for Deficiency & Insufficiency - 1 Vitamin D Testing Kit - Easy Home Testing for Accurate Results
- Price
- £4.91
- Rating
- 4.0/5
- Reviews
- 360
- Age
- 6y ago
Newfoundland Vitamin D Test Kit - UV Deficiency Detection - 99% Accurate Home Test for Vitamin D Levels - Certified by CE - Blood Test Kit for D3 & D2 - Sunlight & UVB Single Person Testing
- Price
- £6.66
- Rating
- 3.8/5
- Reviews
- 225
- Age
- 3y ago
2 x Vitamin D Level Insufficiency Deficiency Testing Kits (2 Tests)
- Price
- £7.51
- Rating
- 3.7/5
- Reviews
- 214
- Age
- 6y ago
KP Pharma Vitamin D Test Kit Check for UV Deficiency & Insufficiency Level at Home Clinically Tested Certified by CE Easy and Quick Test Kit for Accurate Results - 1 Vitamin D Testing Kit
- Price
- £4.88
- Rating
- 3.5/5
- Reviews
- 48
- Age
- 1y ago
Vitamin D Level Insufficiency Deficiency Self Testing Kit Rapid Test Cassette
- Price
- £4.91
- Rating
- 3.9/5
- Reviews
- 49
- Age
- 4y ago
Trending
estimated 90-day click momentumVitamin D Test Kit - Check for Deficiency & Insufficiency - 1 Vitamin D Testing Kit - Easy Home Testing for Accurate Results
- Price
- £4.91
- Rating
- 4.0/5
- Reviews
- 360
- Age
- 6y ago
Newfoundland Vitamin D Test Kit - UV Deficiency Detection - 99% Accurate Home Test for Vitamin D Levels - Certified by CE - Blood Test Kit for D3 & D2 - Sunlight & UVB Single Person Testing
- Price
- £6.66
- Rating
- 3.8/5
- Reviews
- 225
- Age
- 3y ago
KP Pharma Vitamin D Test Kit Check for UV Deficiency & Insufficiency Level at Home Clinically Tested Certified by CE Easy and Quick Test Kit for Accurate Results - 1 Vitamin D Testing Kit
- Price
- £4.88
- Rating
- 3.5/5
- Reviews
- 48
- Age
- 1y ago
Berkeley Health Vitamin D Test Kit Easy Home Use Clear Results (1 Test)
- Price
- £8.48
- Rating
- 3.9/5
- Reviews
- 67
- Age
- 2y ago
Vitamin D Level Insufficiency Deficiency Self Testing Kit Rapid Test Cassette
- Price
- £4.91
- Rating
- 3.9/5
- Reviews
- 49
- Age
- 4y ago
Newest
by launch dateKP Pharma Vitamin D Test Kit Check for UV Deficiency & Insufficiency Level at Home Clinically Tested Certified by CE Easy and Quick Test Kit for Accurate Results - 1 Vitamin D Testing Kit
- Price
- £4.88
- Rating
- 3.5/5
- Reviews
- 48
- Age
- 1y ago
Berkeley Health Vitamin D Test Kit Easy Home Use Clear Results (1 Test)
- Price
- £8.48
- Rating
- 3.9/5
- Reviews
- 67
- Age
- 2y ago
Newfoundland Vitamin D Test Kit - UV Deficiency Detection - 99% Accurate Home Test for Vitamin D Levels - Certified by CE - Blood Test Kit for D3 & D2 - Sunlight & UVB Single Person Testing
- Price
- £6.66
- Rating
- 3.8/5
- Reviews
- 225
- Age
- 3y ago
Vitamin D Level Insufficiency Deficiency Self Testing Kit Rapid Test Cassette
- Price
- £4.91
- Rating
- 3.9/5
- Reviews
- 49
- Age
- 4y ago
2 x Vitamin D Level Insufficiency Deficiency Testing Kits (2 Tests)
- Price
- £7.51
- Rating
- 3.7/5
- Reviews
- 214
- Age
- 6y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 93% of clicks. A locked shelf that new listings rarely crack.
Brands
6 falling
Sellers
10
Est. top-5 brand share
97%
Top 20: 100%
Est. top-5 click share
93%
Top 20: 100%
Open market
0%
- One Step57%
- Newfoundland28%
- KP Pharma5%
- MediMad4%
- Berkeley Health3%
- ALLTEST3%
- Open — no brand owns it (0%)
Demand
Vitamin D Test Kit search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Jan, Feb, Mar · busiest ÷ quietest = 3.9×
Search terms
Top Vitamin D Test Kit search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- vitamin d test kit19K/yr
- vitamin d test14K/yr
- vitamin d test kit home uk6K/yr
Reviews and returns
What reviews say buyers love and hate about Vitamin D Test Kit
We read the reviews and the return reasons for every product selling here.
“as sometimes these may not be accurate”
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.
12 topics
Keep looking
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Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Vitamin D Test Kit 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