---
title: "Whitening Mouthwash — £100K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/health-personal-care/whitening-mouthwash"
last_updated: "2026-07-31T10:44:22.157Z"
locale: en
meta:
description: "Niche score 48/100 · £100K/yr market · 90K searches/yr · £6.51 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 48/100 · £100K/yr market · 90K searches/yr · £6.51 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Whitening Mouthwash — £100K/yr Amazon UK Niche (2026) - Flapen"
---
# **whitening mouthwash**
**Skip it**
Prices mostly outside the sweet spot ($1.97–$15.19) — this niche doesn't clear our bar today.
Market size 25Growth 50Conversion 98Competition 25Returns 100Price range 1Avg price 18Brand share 26Review moat 42Quality gap 77
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****16.9%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Great****4.3★**
avg incumbent rating — lower means beatable quality
**Growth**
**Okay****+19.6%**
90-day search growth — must beat 0% to launch
**Review moat**
**Okay****2,341.38**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Okay****89%**
top-5 brand share — brands hold most of the demand
**Market size**
**Bad****£100K**
£100K/yr · 90K searches
**Competition**
**Bad****71%**
top-5 click share — a locked-up shelf
**Avg price**
**Bad****£6.51**
avg listing price — sweet spot $15–$100
**Price range**
**Bad****£1.97–£15.19**
cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, whitening mouthwash is a £100K/yr Amazon United Kingdom market (90K searches/yr). The top 5 brands hold 89% of demand. Verdict: Skip it — 48/100.
Data updated Jul 24, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **whitening mouthwash market data**
- **Units sold / yr**
- **15K–20K**
- avg 1,000–1,250/product
- **Revenue / yr**
- **£98K–£130K**
- units × avg price
- **Conversion rate**
- **16.9%**
- **Avg BSR**
- **#56**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **77%**
- **Out of stock**
- **0.5%**
- **Avg brand age**
- **47 months**
- **Avg seller age**
- **173 days**
## **Competition & brand share**
The top 5 products capture 71% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**9 **▲rising
**Sellers**
**42**
**Top-5 brand share**
**89%**
Top 20: 100%
**Top-5 click share**
**71%**
Top 20: 100%
**Open market**
**6%**
- Listerine35% - Waken16% - HISMILE16% - Colgate13% - DrDent10% - CB124% - Open — no brand owns it (3 brands, 6%)
## **Demand**
Weekly Amazon search volume, last 50 weeks — +19.6% search growth over the last 90 days.
7K5KHoliday '25Spike '26Aug '25Oct '25Nov '25Jan '26Mar '26May '26
[**Open Trend **](https://flapen.com/research/uk/health-personal-care/whitening-mouthwash/trend)
## **Top whitening mouthwash search terms**
- **whitening mouthwash**51K/yr+8.4%13.7% conv. - **teeth whitening mouthwash**13K/yr+95.8%12.6% conv. - **mouthwash whitening**16K/yr-3.2%16.7% conv. - **listerine advanced white mouthwash**5K/yr+53.2%19.8% conv. - **mouth wash whitening**4K/yr+38.4%17.1% conv. - **listerine whitening mouthwash**3K/yr-0.7%17.8% conv. [**All search terms **](https://flapen.com/research/uk/health-personal-care/whitening-mouthwash/search-terms)
## **Top whitening mouthwash 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%10%£10K20%£20K30%£30K40%£40K101001K10K Reviews — right = deep review moatMarket 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.
### **Top sellers**
by 90-day click share
[1**Listerine Advanced White Milder Taste (Zero Alcohol) Mouthwash (500ml) Fluoride Mouthwash to Whiten and Protect from New Stains While Remineralising and Strengthening Teeth**Listerine**£3.08**4.5★3,832 rev](https://www.amazon.co.uk/dp/B010W7POVK) [2**Waken Whitening Mouthwash clinically Tested whitening Formula for a Brighter Smile Prevents Enamel Stains Alcohol-Free Vegan Recycled Packaging Natural Peppermint Flavour 500ml**Waken**£2.26**4.3★1,661 rev](https://www.amazon.co.uk/dp/B09VLF5VT5) [3**Hismile iD Stain Whitening Mouthwash Gunk Removing Mouthwash for Fresh Breath Hydrogen Peroxide Mouthwash to Promote Whiter Teeth Alcohol-Free Mouthwash with Essential Oils 237ml**HISMILE**£10.06**4.3★2,853 rev](https://www.amazon.co.uk/dp/B0GC1X785H) [4**Colgate Max White Expert Whitening 500ml Mouthwash - Instantly Whiter Teeth- Alcohol Free - Clinically Tested**Colgate**£2.10**4.4★4,765 rev](https://www.amazon.co.uk/dp/B00EF4SU0Y) [5**DR.DENT Purple Mouthwash for Teeth Whitening - Color Correcting Mouthwash Sachets (20 Pack) - Peroxide Free Alcohol Free - Freshens Breath Supports Gum Health - Vegan Mint Flavor**DrDent**£15.19**3.2★220 rev](https://www.amazon.co.uk/dp/B0GSRN3Y2Q)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**DR.DENT Purple Mouthwash for Teeth Whitening - Color Correcting Mouthwash Sachets - Peroxide Free Alcohol Free - Freshens Breath Supports Gum Health - Vegan Mint Flavor (20 pc)**DrDent**£14.33**205 rev2mo ago](https://www.amazon.co.uk/dp/B0GYWJ7KCR) [**DR.DENT Purple Mouthwash for Teeth Whitening - Color Correcting Mouthwash Sachets (20 Pack) - Peroxide Free Alcohol Free - Freshens Breath Supports Gum Health - Vegan Mint Flavor**DrDent**£15.19**220 rev4mo ago](https://www.amazon.co.uk/dp/B0GSRN3Y2Q) [**Hismile iD Stain Whitening Mouthwash Gunk Removing Mouthwash for Fresh Breath Hydrogen Peroxide Mouthwash to Promote Whiter Teeth Alcohol-Free Mouthwash with Essential Oils 237ml**HISMILE**£10.06**2,853 rev7mo ago](https://www.amazon.co.uk/dp/B0GC1X785H) [**Colgate Max White Purple Mouthwash 500ml**Colgate**£2.73**24 rev1y ago](https://www.amazon.co.uk/dp/B0DT495KVX) [**Waken Whitening Mouthwash clinically Tested whitening Formula for a Brighter Smile Prevents Enamel Stains Alcohol-Free Vegan Recycled Packaging Natural Peppermint Flavour 500ml**Waken**£2.26**1,661 rev4y ago](https://www.amazon.co.uk/dp/B09VLF5VT5)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**DR.DENT Purple Mouthwash for Teeth Whitening - Color Correcting Mouthwash Sachets - Peroxide Free Alcohol Free - Freshens Breath Supports Gum Health - Vegan Mint Flavor (20 pc)**DrDent**£14.33**3.4★**▲ 199%**](https://www.amazon.co.uk/dp/B0GYWJ7KCR) [**Colgate Max White Purple Mouthwash 500ml**Colgate**£2.73**4.1★**▲ 184%**](https://www.amazon.co.uk/dp/B0DT495KVX) [**DR.DENT Purple Mouthwash for Teeth Whitening - Color Correcting Mouthwash Sachets (20 Pack) - Peroxide Free Alcohol Free - Freshens Breath Supports Gum Health - Vegan Mint Flavor**DrDent**£15.19**3.2★**▲ 180%**](https://www.amazon.co.uk/dp/B0GSRN3Y2Q) [**Hismile iD Stain Whitening Mouthwash Gunk Removing Mouthwash for Fresh Breath Hydrogen Peroxide Mouthwash to Promote Whiter Teeth Alcohol-Free Mouthwash with Essential Oils 237ml**HISMILE**£10.06**4.3★**▲ 97%**](https://www.amazon.co.uk/dp/B0GC1X785H) [**Listerine Advanced White Milder Taste (Zero Alcohol) Mouthwash (500ml) Fluoride Mouthwash to Whiten and Protect from New Stains While Remineralising and Strengthening Teeth**Listerine**£3.08**4.5★**— 10%**](https://www.amazon.co.uk/dp/B010W7POVK)
**~~View all trending →~~**
## **What buyers say about whitening mouthwash**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Oral Hygiene**19%
*“Good for the gums”*
**Taste-Overall**11%
*“Great taste”*
**Quality-Overall**8%
*“Excellent Quality Product”*
**Tooth Brightening**7%
*“Brilliant, definitely whitens teeth”*
**Advertised Vs Actual Product**6%
*“Does what is being advertised”*
**Freshness**6%
*“Fresh mouth”*
**Cleansing**5%
*“Clean and fresh”*
**Value For Money**5%
*“Good value for money”*
**Breathability**5%
*“Fresh Breathe”*
**Ease Of Use**3%
*“easy to use on the go”*
### **What buyers complain about **
**Taste-Overall**15%
*“Peculiar taste”*
**Value For Money**10%
*“Bit expensive”*
**Oral Hygiene**9%
*“gums no spectacular results for me frankly I was a little underwhelmed”*
**Functionality-Overall**8%
*“Doesn't really do the job”*
**Advertised Vs Actual Product**6%
*“Does not work as advertised”*
**Tooth Brightening**4%
*“Do not whiten your teeth”*
**Color**3%
*“Its already BROWN”*
**Color Fading/Discoloration**2%
*“But the liquid itself has a brown colouring -”*
**Quality-Overall**2%
*“not as amazing as its made out to be”*
**Flavor**2%
*“its a bizarre flavour”*
### **Top return reasons **
**Functionality-Overall**24%
**Advertised Vs Actual Product**22%
**Leak-Proof**9%
**Taste-Overall**7%
**Tooth Brightening**5%
**Value For Money**5%
**Tooth Sensitivity**4%
**Ingredients-Overall**3%
**Quality-Overall**2%
**Color**2%
## **Common questions**
- **Is whitening mouthwash profitable to sell on Amazon United Kingdom?**
- The niche generates £100K/yr across 13 tracked products. 3 of 3 products launched in the last 360 days are still selling. 90-day search growth is +19.6%. Flapen's verdict: Skip it (48/100).
- **How competitive is the whitening mouthwash niche?**
- 9 brands and 42 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 89% of demand.
- **What do buyers complain about in whitening mouthwash?**
- Top complaints mined from reviews: Taste-Overall, Value For Money, Oral Hygiene. The return rate is 0.1%.
- **What does it cost to enter the whitening mouthwash niche?**
- Listings span £1.97–£15.19; the average listing price is £6.51 (sweet spot $15–$100). The average incumbent carries 2,341 reviews — the moat a new listing must climb.
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