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Soft demand (-40.4% this quarter) — this niche doesn't clear our bar today.

Market size 7Growth 5Conversion 42Competition 40Returns 97Price range 10Avg price 32Brand share 50Review moat 25Quality gap 99

Quality gap

Incredible3.6★

avg incumbent rating — lower means beatable quality

Returns

Incredible0.5%

return rate — above 6% kills the launch gate

Brand share

Okay75%

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

Conversion

Okay3.4%

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

Competition

Okay61%

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

Avg price

Okay€9.86

avg listing price — sweet spot $15–$100

Review moat

Bad4,360.89

avg incumbent reviews — the moat a new listing must climb

Price range

Bad€4.10–€16.24

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

Market size

Bad€27K

€27K/yr · 81K searches

Growth

Bad-40.4%

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

Competition

The top 5 products take 61% of clicks — established leaders, but buyers still shop beyond them.

Brands

15 flat

Sellers

37

Top-5 brand share

75%

Open market

20%

  • BLholife34%
  • Zavonirae16%
  • Colgate11%
  • RAPIDWHITE7%
  • The Golden Smile7%
  • OKAQEE5%

Product shelf

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%10%€3K20%€5K30%€8K40%€11K1101001K10K100K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 19 tracked products in this niche — three views at once, no toggling.

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -40.4% search growth over the last 90 days.
5K3KSpike '24Holiday '24Spike '25Prime Day '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Mar · busiest ÷ quietest = 1.8×

Reviews

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

What buyers love

Zahnaufhellung21%

“Super Whitening Pen”

Qualität insgesamt18%

“Super Produkt”

Benutzerfreundlichkeit15%

“Anwendung easy”

Mundhygiene7%

“Super Zahnaufheller”

beworben Vs Tatsächliches Produkt6%

“Super Produkt, tut was es soll”

Geschmack insgesamt5%

“Schmeckt gut und einfach anzuwenden”

Geschmack5%

“Super geschmack”

Effizienz4%

“Funktioniert”

Preis-Leistungs-Verhältnis3%

“Preis, Leistung ist ok”

Helligkeit/Glanz/Glühen3%

“Zahnaufheller”

What buyers complain about

Funktionalität insgesamt27%

“Null Wirkung”

beworben Vs Tatsächliches Produkt12%

“Hält nicht, was es verspricht”

Preis-Leistungs-Verhältnis8%

“Geldverschwendung”

Sichtweite7%

“Kein sichtbares Ergebniss”

Geschmack insgesamt5%

“Geschmacklich nichts, Wirkung gleich null”

Farbe3%

“Blau verschwindet zwar schnell,”

Zahnaufhellung3%

“Zahnaufhellung= Null”

Farbverblassen/Verfärbung3%

“und andere Ablagerungen stark verfärbt”

Mundhygiene3%

“Und ersetzt keinesfalls eine professionelle Zahnreinigung”

Verschwendung natürlicher Ressourcen2%

“Geldverschwendung”

Top return reasons

Funktionalität insgesamt49%
beworben Vs Tatsächliches Produkt10%
Zahnaufhellung7%
Qualität insgesamt6%
Ethischer Handel/Fairer Handel5%
Zahnempfindlichkeit3%
Helligkeit/Glanz/Glühen2%
Gesamtgröße2%
Auslaufsicher2%
Farbe1%