Is whitening mouthwash profitable to sell on Amazon United States?

The niche generates $2.2M/yr across 19 tracked products. 3 of 3 products launched in the last 360 days are still selling. 90-day search growth is -4.7%. Flapen's verdict: Worth a look (51/100).

How competitive is the whitening mouthwash niche?

8 brands and 65 sellers compete. The top 5 products take 66% of clicks and top 5 brands hold 94% of demand.

What do buyers complain about in whitening mouthwash?

Top complaints mined from reviews: Taste-Overall, Value For Money, Advertised Vs Actual Product. The return rate is 0.2%.

When does demand for whitening mouthwash peak?

Demand is steady year-round — the busiest month runs 1.5× the quietest.

What does it cost to enter the whitening mouthwash niche?

Listings span $4.31–$21.19; the average listing price is $12.01 (sweet spot $15–$100). The average incumbent carries 4,056 reviews — the moat a new listing must climb.

whitening mouthwash

Worth a look

Shows low returns (0.2%), but brand-locked demand (top 5 brands take 94% of clicks) keeps it on the watch list.

Returns

Incredible0.2%

return rate — above 5% kills the launch gate

Conversion

Incredible17.0%

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

Market size

Incredible$2.2M

$2.2M/yr · 1.1M searches

Avg price

Good$12.01

avg listing price — sweet spot $15–$100

Price range

Okay$4.31–$21.19

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

Competition

Okay66%

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

Review moat

Bad4,055.95

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-4.7%

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

Quality gap

Bad4.6★

avg incumbent rating — lower means beatable quality

Brand share

Bad94%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, whitening mouthwash is a $2.2M/yr Amazon United States market (1.1M searches/yr). The top 5 brands hold 94% of demand. Verdict: Worth a look — 51/100.

Data updated Jul 14, 2026 · scored weekly · How we score niches

whitening mouthwash market data

Units sold / yr: 150K–200K; avg 8,000–10,000/product
Revenue / yr: $1.8M–$2.4M; units × avg price
Conversion rate: 17.0%
Avg BSR: #101
Page quality: 0%
Prime: 100%
Sponsored: 79%
Out of stock: 0.0%
Avg brand age: 55 months
Avg seller age: 135 days

Competition & brand share

The top 5 products take 66% of clicks — established leaders, but buyers still shop beyond them.

Brands

8 rising

Sellers

Top-5 brand share

94%

Top 20: 100%

Top-5 click share

66%

Top 20: 100%

Open market

Crest48%
TheraBreath24%
Amazon Basics9%
Colgate8%
GuruNanda5%
HISMILE2%
Open — no brand owns it (2 brands, 3%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -4.7% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.5×

Open Trend

Top whitening mouthwash search terms

whitening mouthwash358K/yr +11.3%15.5% conv.
mouthwash whitening124K/yr +3.9%19.3% conv.
crest whitening mouthwash77K/yr +1.8%18.6% conv.
teeth whitening mouthwash52K/yr +16.7%11.9% conv.
therabreath mouthwash whitening64K/yr -49.5%13.2% conv.
therabreath whitening36K/yr -6.2%14.3% conv.
crest 3d white mouthwash52K/yr -5.9%15.1% conv.
therabreath whitening mouthwash39K/yr -38.7%13.7% conv.
colgate optic white mouthwash31K/yr +13.1%14.9% conv.
whitening mouth wash37K/yr -4.8%16.0% conv.

All 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

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

Top sellers

by 90-day click share

Crest Pro-Health Advanced Mouthwash Alcohol Free Extra Whitening Energizing Mint Flavor 946 mL (32 fl oz)

Crest$7.044.7★22,877 rev

Crest 3D White Mouthwash Teeth Whitening for Adults 1L 2 Pack Alcohol Free Mouth Rinse Breath Freshener Antibacterial Antiseptic Bad Breath Treatment Peroxide Free Clean Mint

Crest$14.804.7★1,870 rev

TheraBreath Whitening Mouthwash Dazzling Mint 1 Liter

TheraBreath$15.984.8★314 rev

Colgate Optic White Advanced Teeth Whitening Mouthwash 3 Pack 2% Hydrogen Peroxide Alcohol-Free and Enamel Safe ICY Fresh Mint 32 Oz

Colgate$16.544.6★6,957 rev

Amazon Basics Teeth Whitening Mouthwash Alcohol-Free Clean Mint Breath Freshener 32 Fluid Ounces 1-Pack (Previously Solimo)

Amazon Basics$4.914.5★3,349 rev

Newest

by launch date

Crest 3D Clean Mint Mouthwash 32 Fluid Ounce

Crest$7.39314 rev

1mo ago

Hismile iD Stain Whitening Mouthwash Gunk Removing Mouthwash for Fresh Breath Hydrogen Peroxide Mouthwash to Promote Whiter Teeth Peroxide Rinse with Essential Oils 237ml

HISMILE$19.192,733 rev

6mo ago

GuruNanda Whitening Mouthwash Up to 3 Shades Whiter Teeth in 2 Weeks Alcohol & Fluoride Free with Hydrogen Peroxide Oxyburst Technology - Wild Mint 16 oz

GuruNanda$7.79528 rev

8mo ago

TheraBreath Whitening Toothpaste Dazzling Mint 4 Oz 2-Pack

TheraBreath$11.931,029 rev

12mo ago

TheraBreath Whitening Mouthwash Dazzling Mint 1 Liter

TheraBreath$15.98314 rev

1y ago

What buyers say about whitening mouthwash

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

What buyers love

Tooth Brightening16%

“Teeth whitening”

Quality-Overall12%

“Great price, quality, and super convenient having it delivered to the door”

Oral Hygiene9%

“It is however really good at cleaning your mouth”

Cleansing9%

“Clean Feeling”

Breathability8%

“freshens your breath”

Advertised Vs Actual Product7%

“As advertised”

Value For Money7%

“Good price”

Efficiency6%

“Product does work”

Taste-Overall3%

“Fresh taste”

Ease Of Use2%

“Clean feeling”

What buyers complain about

Taste-Overall12%

“Doesnt taste very good”

Value For Money12%

“Its expensive”

Advertised Vs Actual Product9%

“deceptive advertising”

Color6%

“it brown looking”

Functionality-Overall3%

“Didnt work”

Stain Resistance3%

“This Mouthwash Can Stain Your Teeth”

Size-Overall2%

“Very large size”

Ease Of Cleaning2%

“leaves you feeling less clean”

Ease Of Use2%

“it was very weird to use”

Leak-Proof2%

“One of the bottles leaked”

Top return reasons

Advertised Vs Actual Product25%

Leak-Proof18%

Taste-Overall10%

Functionality-Overall9%

Size-Overall7%

Value For Money5%

Ingredients-Overall4%

Defective Material/Parts2%

Smell2%

Product Condition2%

Common questions

Is whitening mouthwash profitable to sell on Amazon United States?: The niche generates $2.2M/yr across 19 tracked products. 3 of 3 products launched in the last 360 days are still selling. 90-day search growth is -4.7%. Flapen's verdict: Worth a look (51/100).
How competitive is the whitening mouthwash niche?: 8 brands and 65 sellers compete. The top 5 products take 66% of clicks and top 5 brands hold 94% of demand.
What do buyers complain about in whitening mouthwash?: Top complaints mined from reviews: Taste-Overall, Value For Money, Advertised Vs Actual Product. The return rate is 0.2%.
When does demand for whitening mouthwash peak?: Demand is steady year-round — the busiest month runs 1.5× the quietest.
What does it cost to enter the whitening mouthwash niche?: Listings span $4.31–$21.19; the average listing price is $12.01 (sweet spot $15–$100). The average incumbent carries 4,056 reviews — the moat a new listing must climb.