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59

vitamin d test

Worth a look

Shows low returns (0.1%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 42Growth 0Conversion 72Competition 52Returns 99Price range 77Avg price 81Brand share 62Review moat 91Quality gap 95

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Quality gap

Incredible4.0★

avg incumbent rating — lower means beatable quality

Review moat

Great189.46

avg incumbent reviews — the moat a new listing must climb

Avg price

Great€17.38

avg listing price — sweet spot $15–$100

Price range

Great€5.49–€47.01

cheapest to priciest tracked listing — scored on the share inside $15–$100

Conversion

Good6.7%

search→purchase rate — share of searches ending in a sale

Brand share

Good68%

top-5 brand share — brands hold most of the demand

Competition

Good54%

top-5 click share — leaders hold, buyers still browse

Market size

Okay€218K

€218K/yr · 187K searches

Growth

Bad-54.6%

90-day search growth — must beat 0% to launch

According to Flapen's Amazon Germany niche tracking, vitamin d test is a €218K/yr Amazon Germany market (187K searches/yr). The top 5 brands hold 68% of demand. Demand peaks in Jan–Feb–Oct–Nov. Verdict: Worth a look — 59/100.

Data updated Jul 10, 2026 · scored weekly · How we score niches

vitamin d test market data

Units sold / yr
13K–15K
avg 750–1,000/product
Revenue / yr
€217K–€261K
units × avg price
Conversion rate
6.7%
Avg BSR
#133
Page quality
0%
Prime
69%
Sponsored
85%
Out of stock
7.2%
Avg brand age
56 months
Avg seller age
193 days

Competition & brand share

The top 5 products take 54% of clicks — established leaders, but buyers still shop beyond them.

Brands

11 rising

Sellers

15

Top-5 brand share

68%

Top 20: 100%

Top-5 click share

54%

Top 20: 100%

Open market

24%

  • CERASCREEN25%
  • One Step16%
  • AssuTest11%
  • NanoRepro8%
  • Homehulab8%
  • HIXO8%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -54.6% search growth over the last 90 days.
8K6KSpike '24Black Friday '24Spike '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Jan, Feb, Oct, Nov · busiest ÷ quietest = 3.0×

Top vitamin d test search terms

  • vitamin d test72K/yr
  • vitamin d test für zuhause45K/yr
  • vitamin d3 test für zuhause13K/yr
  • vitamin d3 test11K/yr
  • vitamin d selbsttest testsieger5K/yr
  • vitamin d test für zuhause mit wert8K/yr
  • vitamin d selbsttest11K/yr
  • vitamin d schnelltest6K/yr
  • selbsttest vitamin d6K/yr
  • d3 test3K/yr
All search terms

Top vitamin d test 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%5%€11K10%€22K15%€33K20%€44K1101001K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 13 tracked products in this niche — three views at once, no toggling.

What buyers say about vitamin d test

What buyers praise and complain about, mined from review topics.

What buyers love

Benutzerfreundlichkeit33%

“Der Test geht ganz einfach: man desinfiziert eine Fingerkuppe, pickst hinein, fängt Blut auf und gibt es in die Pufferlösung und gibt es auf die Testkasette”

Anleitung/Benutzerhandbuch/Fehlerbehebung12%

“eine umfassende, gut verständliche Gebrauchsanweisung.”

Vitamin11%

“Vitamin D Test --super”

Genauigkeit insgesamt9%

“Reliable Result”

Preis-Leistungs-Verhältnis7%

“Preislich noch in Ordnung”

Qualität insgesamt6%

“Super Produkt”

beworben Vs Tatsächliches Produkt4%

“Hält was er verspricht”

Effizienz1%

“machen ganze Arbeit”

Gesundheitsüberwachung1%

“Ideal zur gesundheitlichen Vorsorge”

Sichtweite1%

“Super Ergebnis konnte man gut erkennen”

What buyers complain about

Genauigkeit insgesamt23%

“Unsicher”

Messung / Ablesegenauigkeit8%

“Ungenau”

Preis-Leistungs-Verhältnis5%

“Rausgeworfenes Geld”

Funktionalität insgesamt5%

“Lanzette funktioniert nicht”

Benutzerfreundlichkeit5%

“Unbrauchbar”

Dosierung4%

“Test ist nicht zu empfehlen zu ungenau lautest mangelhaft 10 ml ich nehme aber täglich 5000 Einheiten ein das ist nicht relevant was das Ergebnis zeigt”

beworben Vs Tatsächliches Produkt4%

“Nichtssagend”

Anleitung/Benutzerhandbuch/Fehlerbehebung4%

“Vorher sollte man die Anleitung sorgfältig lesen”

Vitamin3%

“Vitamin D. Dieser Test hier ist extrem fehleranfällig”

Farbe2%

“Die Interpretation über die Farbintensität der Testlinie im Vergleich zu einer Farbskala finde ich ziemlich schwierig”

Top return reasons

Funktionalität insgesamt38%
Genauigkeit insgesamt36%
beworben Vs Tatsächliches Produkt7%
Vitamin5%
Sichtweite3%
Farbe3%
Dosierung3%
Gesamtgröße3%

Common questions

Is vitamin d test profitable to sell on Amazon Germany?
The niche generates €218K/yr across 13 tracked products. 1 of 4 products launched in the last 360 days are still selling. 90-day search growth is -54.6%. Flapen's verdict: Worth a look (59/100).
How competitive is the vitamin d test niche?
11 brands and 15 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 68% of demand.
What do buyers complain about in vitamin d test?
Top complaints mined from reviews: Genauigkeit insgesamt, Messung / Ablesegenauigkeit, Preis-Leistungs-Verhältnis. The return rate is 0.1%.
When does demand for vitamin d test peak?
Demand peaks in Jan–Feb–Oct–Nov; the busiest month runs 3.0× the quietest.
What does it cost to enter the vitamin d test niche?
Listings span €5.49–€47.01; the average listing price is €17.38 (sweet spot $15–$100). The average incumbent carries 189 reviews — the moat a new listing must climb.