---
title: "Kids Mouthwash — £56K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/health-personal-care/kids-mouthwash"
last_updated: "2026-07-31T21:46:43.121Z"
locale: en
meta:
description: "Niche score 38/100 · £56K/yr market · 141K searches/yr · £4.79 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 38/100 · £56K/yr market · 141K searches/yr · £4.79 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Kids Mouthwash — £56K/yr Amazon UK Niche (2026) - Flapen"
---
# **kids mouthwash**
**Skip it**
Prices mostly outside the sweet spot ($1.31–$14.66) — this niche doesn't clear our bar today.
Market size 14Growth 50Conversion 80Competition 20Returns 100Price range 0Avg price 13Brand share 23Review moat 45Quality gap 25
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****8.3%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Okay****+20.0%**
90-day search growth — must beat 0% to launch
**Review moat**
**Okay****1,953.92**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Bad****91%**
top-5 brand share — brand-locked demand
**Competition**
**Bad****76%**
top-5 click share — a locked-up shelf
**Market size**
**Bad****£56K**
£56K/yr · 141K searches
**Avg price**
**Bad****£4.79**
avg listing price — sweet spot $15–$100
**Price range**
**Bad****£1.31–£14.66**
cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, kids mouthwash is a £56K/yr Amazon United Kingdom market (141K searches/yr). The top 5 brands hold 91% of demand. Verdict: Skip it — 38/100.
Data updated Jul 24, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **kids mouthwash market data**
- **Units sold / yr**
- **20K–25K**
- avg 2,000–2,500/product
- **Revenue / yr**
- **£96K–£120K**
- units × avg price
- **Conversion rate**
- **8.3%**
- **Avg BSR**
- **#87**
- **Page quality**
- **0%**
- **Prime**
- **92%**
- **Sponsored**
- **92%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **64 months**
- **Avg seller age**
- **179 days**
## **Competition & brand share**
The top 5 products capture 76% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**9 **▲rising
**Sellers**
**43**
**Top-5 brand share**
**91%**
Top 20: 100%
**Top-5 click share**
**76%**
Top 20: 100%
**Open market**
**5%**
- Aquafresh34% - Listerine33% - Dentyl14% - CLARISMILE PARIS5% - ACT5% - SENSODYNE PRONAMEL4% - Open — no brand owns it (3 brands, 5%)
## **Demand**
Weekly Amazon search volume, last 36 weeks — +20.0% search growth over the last 90 days.
4K3KSpike '26Nov '25Dec '25Feb '26Mar '26May '26Jun '26
[**Open Trend **](https://flapen.com/research/uk/health-personal-care/kids-mouthwash/trend)
## **Top kids mouthwash search terms**
- **kids mouthwash**80K/yr+21.2%2.7% conv. - **mouthwash kids**9K/yr+50.5%2.9% conv. - **kids mouthwash 6-8**8K/yr-1.9%3.3% conv. - **kids mouthwash 9-12**6K/yr+19.6%3.1% conv. - **childrens mouthwash**6K/yr+12.6%3.0% conv. - **listerine kids mouthwash**4K/yr+49.8%0.9% conv. - **kids mouth wash**5K/yr+23.7%3.7% conv. - **listerine smart rinse kids**4K/yr+33.6%0.7% conv. - **kids mouthwash 3-5 years**4K/yr-10.5%2.0% conv. - **mouthwash for kids**5K/yr-6.5%2.7% conv. [**All search terms **](https://flapen.com/research/uk/health-personal-care/kids-mouthwash/search-terms)
## **Top kids 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%£6K20%£11K30%£17K40%£22K1101001K10K 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**Aquafresh Mouthwash for Kids Big Teeth Mouthwash for Children 6-8 Years Fruity Flavour 300 ml**Aquafresh**£1.31**4.6★763 rev](https://www.amazon.co.uk/dp/B01BIS3VVM) [2**Listerine Smart Rinse Mild Mint Mouthwash (500ml) Kids Alcohol-Free Mouthwash to Reduce Cavities Bad Bacteria and Cleaning Teeth Gums and Tongue Sugar-Free Formula**Listerine**£2.48**4.7★3,192 rev](https://www.amazon.co.uk/dp/B0056G7I26) [3**Dentyl Dual Action CPC Mouthwash 12hrs Fresh Breath & Total Care Alcohol Free Unicorn Edition Mystical Mint 500 ml**Dentyl**£2.73**4.4★325 rev](https://www.amazon.co.uk/dp/B08MXRXL3M) [4**Listerine Total Care Mild Taste (Alcohol Free) Antibacterial Mouthwash (500ml) Fresh Mint Flavour with 6-in-1 Benefits Helps Reduce Plaque and Freshens Breath**Listerine**£1.95**4.6★5,136 rev](https://www.amazon.co.uk/dp/B006USGEOC) [5**Listerine Smart Rinse Mild Berry Mouthwash (1x 500ml) Kids Mouthwash to Reduce Cavities Bad Bacteria and Cleaning Teeth Gums and Tongue Sugar-and Alcohol-Free Formula**Listerine**£2.60**4.7★3,192 rev](https://www.amazon.co.uk/dp/B0050IE1V6)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Clarismile Kids Oral Spray Fluoride-Free Dental Spray for Children Hydroxyapatite & Xylitol Enamel Support Strawberry Flavor 30ml**CLARISMILE PARIS**£14.66**41 rev4mo ago](https://www.amazon.co.uk/dp/B0G1N837XV) [**Grin Ultra Clean Kids Dental Floss Sticks Fruity Floss Picks with Peach Flavour - Fluoride Free Gentle on Tight Teeth - 100% Recycled Convenient Handle for Daily Oral Care - 80pk Canister**Grin**£4.70**14 rev7mo ago](https://www.amazon.co.uk/dp/B0G46WBRTN) [**Sensodyne Pronamel Junior 6-12 Years Toothpaste for Juniors 2X Stronger Enamel Defence* Bubble Mint Flavour 50 ml *Protection from Sugar acids vs Your Mouths Natural defences.**SENSODYNE PRONAMEL**£1.62**736 rev1y ago](https://www.amazon.co.uk/dp/B0DTZ1JB4N) [**Kids Mouthwash Bundle which Contains Aquafresh Mouthwash Kids Big Teeth 6-8 Years 300ml - Pack of 2 with Grocery List Card**Think Outside the Gift**£8.11**7 rev2y ago](https://www.amazon.co.uk/dp/B0CFWF69K5) [**BURST Kids Flossers (90 Count/1 Pack) | Strawberry Aroma | Toddler Dental Flossable Picks with Ergonomic Design | No-Slip Grip | Smiley Face and Fun Colors**Burst**£3.03**679 rev3y ago](https://www.amazon.co.uk/dp/B0BSJWW9BQ)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Clarismile Kids Oral Spray Fluoride-Free Dental Spray for Children Hydroxyapatite & Xylitol Enamel Support Strawberry Flavor 30ml**CLARISMILE PARIS**£14.66**4.8★**▲ 428%**](https://www.amazon.co.uk/dp/B0G1N837XV) [**Grin Ultra Clean Kids Dental Floss Sticks Fruity Floss Picks with Peach Flavour - Fluoride Free Gentle on Tight Teeth - 100% Recycled Convenient Handle for Daily Oral Care - 80pk Canister**Grin**£4.70**4.1★**▲ 278%**](https://www.amazon.co.uk/dp/B0G46WBRTN) [**BURST Kids Flossers (90 Count/1 Pack) | Strawberry Aroma | Toddler Dental Flossable Picks with Ergonomic Design | No-Slip Grip | Smiley Face and Fun Colors**Burst**£3.03**4.6★**▲ 205%**](https://www.amazon.co.uk/dp/B0BSJWW9BQ) [**Dentyl Dual Action CPC Mouthwash 12hrs Fresh Breath & Total Care Alcohol Free Fresh Clove 500 ml**Dentyl**£2.15**4.6★**▲ 175%**](https://www.amazon.co.uk/dp/B07KSD8X1W) [**Listerine Total Care Mild Taste (Alcohol Free) Antibacterial Mouthwash (500ml) Fresh Mint Flavour with 6-in-1 Benefits Helps Reduce Plaque and Freshens Breath**Listerine**£1.95**4.6★**▲ 97%**](https://www.amazon.co.uk/dp/B006USGEOC)
**~~View all trending →~~**
## **What buyers say about kids mouthwash**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Taste-Overall**20%
*“Very mild taste”*
**Oral Hygiene**19%
*“Cleans teeth well”*
**Value For Money**12%
*“Good deal”*
**Flavor**10%
*“Good flavor”*
**Quality-Overall**6%
*“theres no complaints”*
**Cleansing**4%
*“Well, it definitely cleans your mouth,”*
**Freshness**4%
*“Clean and fresh”*
**Advertised Vs Actual Product**4%
*“it does what it says”*
**Tooth Sensitivity**2%
*“Really does protect your teeth”*
**Strength**2%
*“It's very strong”*
### **What buyers complain about **
**Taste-Overall**29%
*“mild in taste”*
**Oral Hygiene**14%
*“Awful, didnt realise Id picked up this one, Ill stick to the normal Dentyl mouthwash in future”*
**Value For Money**7%
*“sometimes expensive”*
**Smell**3%
*“Although the smell from the bottle,be that just the ingredients etc smelt like someone outside was painting with creosote🤧”*
**Size-Overall**3%
*“small”*
**Ease Of Use**3%
*“I cannot use it”*
**Pain Relief-Overall**2%
*“left my mouth in pain for an hour afterward”*
**Strength**2%
*“Nice and not strong”*
**Sweetness**2%
*“Sickly sweet - unpleasant”*
**Tooth Sensitivity**2%
*“not sure it works on his sensitive tooth”*
### **Top return reasons **
**Taste-Overall**18%
**Age Suitability**14%
**Leak-Proof**10%
**Flavor**8%
**Advertised Vs Actual Product**7%
**Quality-Overall**6%
**Color**6%
**Smell**5%
**Pain Relief-Overall**4%
**Value For Money**4%
## **Common questions**
- **Is kids mouthwash profitable to sell on Amazon United Kingdom?**
- The niche generates £56K/yr across 13 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is +20.0%. Flapen's verdict: Skip it (38/100).
- **How competitive is the kids mouthwash niche?**
- 9 brands and 43 sellers compete. The top 5 products take 76% of clicks and top 5 brands hold 91% of demand.
- **What do buyers complain about in kids mouthwash?**
- Top complaints mined from reviews: Taste-Overall, Oral Hygiene, Value For Money. The return rate is 0.1%.
- **What does it cost to enter the kids mouthwash niche?**
- Listings span £1.31–£14.66; the average listing price is £4.79 (sweet spot $15–$100). The average incumbent carries 1,954 reviews — the moat a new listing must climb.
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