Is sp 4 ultra whitening profitable to sell on Amazon United States?

The niche generates $6K/yr across 16 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is -20.1%. Flapen's verdict: Skip it (44/100).

How competitive is the sp 4 ultra whitening niche?

12 brands and 21 sellers compete. The top 5 products take 62% of clicks and top 5 brands hold 71% of demand.

What do buyers complain about in sp 4 ultra whitening?

Top complaints mined from reviews: Functionality-Overall, Advertised Vs Actual Product, Texture/Consistency-Overall. The return rate is 0.3%.

When does demand for sp 4 ultra whitening peak?

Demand peaks in Jan–Feb–Jul–Aug; the busiest month runs 3.4× the quietest.

What does it cost to enter the sp 4 ultra whitening niche?

Listings span $8.97–$25.33; the average listing price is $15.14 (sweet spot $15–$100). The average incumbent carries 432 reviews — the moat a new listing must climb.

sp 4 ultra whitening

Skip it

A small market ($6K/yr) — this niche doesn't clear our bar today.

Returns

Incredible0.3%

return rate — above 5% kills the launch gate

Review moat

Great431.5

avg incumbent reviews — the moat a new listing must climb

Avg price

Great$15.14

avg listing price — sweet spot $15–$100

Price range

Good$8.97–$25.33

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

Brand share

Good71%

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

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Conversion

Okay3.3%

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

Competition

Okay62%

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

Growth

Bad-20.1%

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

Market size

Bad$6K

$6K/yr · 12K searches

Signals Low Review Barrier Out of Stock

According to Flapen's Amazon United States niche tracking, sp 4 ultra whitening is a $6K/yr Amazon United States market (12K searches/yr). The top 5 brands hold 71% of demand. Demand peaks in Jan–Feb–Jul–Aug. Verdict: Skip it — 44/100.

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

sp 4 ultra whitening market data

Units sold / yr: 250–500; avg 0–100/product
Revenue / yr: $4K–$8K; units × avg price
Conversion rate: 3.3%
Avg BSR: #1,256
Page quality: 0%
Prime: 56%
Sponsored: 81%
Out of stock: 18.1%
Avg brand age: 40 months
Avg seller age: 199 days

Competition & brand share

The top 5 products take 62% of clicks — established leaders, but buyers still shop beyond them.

Brands

12 rising

Sellers

Top-5 brand share

71%

Top 20: 98%

Top-5 click share

62%

Top 20: 100%

Open market

20%

MnPalettey24%
sayram13%
Hymhzy12%
SITUDAC11%
Generic10%
YAYASHI9%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -20.1% search growth over the last 90 days.

Peak months: Jan, Feb, Jul, Aug · busiest ÷ quietest = 3.4×

Open Trend

Top sp 4 ultra whitening search terms

sp43K/yr -30.8%0.7% conv.
yayashi1K/yr +1.6%8.7% conv.
sp4 toothpaste whitening1K/yr -13.2%1.5% conv.
sp 4972/yr -17.6%1.8% conv.
yayashi sp-4 probiotic whitening toothpaste878/yr -44.3%1.4% conv.
sp-4 probiotics whitening toothpaste602/yr -5.2%0.6% conv.
sp-4848/yr -25.7%3.8% conv.
sp 4 toothpaste1K/yr +4.3%1.4% conv.
sp-4 toothpaste1K/yr -14.4%6.3% conv.
yayashi sp-4426/yr -48.5%1.5% conv.

All search terms

Top sp 4 ultra whitening 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★)2 products missing review or click data not plotted

All 16 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Ultra SP-4 Probiotic Whitening Toothpaste (2pcs Red)

MnPalettey$15.894.3★11 rev

Sp-6 Probiotic Whitening Toothpaste Sp-6 Ultra Whitening Toothpaste with a Fluoride Free Fresh Breath and Mint Flavored Enhancement Formula Beneficial for Oral Health! 2pc (2)

Hymhzy$12.394.3★145 rev

Nano Hydroxyapatite Toothpastes for Enamel Protection Fluoride Free

SITUDAC$18.234.3★2,943 rev

Sayram SP4 EDC Pouch Waxed Canvas Compact EDC Pocket Organizer Zippered Pocket Pouch for Men Mini EDC Organizer for Change Notebook Tactical Pen Flashlight (Oil Wax Dark Blue)

sayram$16.794.5★177 rev

YAYASHI SP-6 Probiotic Whitening Toothpaste Advanced Formula with 6 Probiotics for Brighter Teeth & Healthier Gums Enamel-Friendly Fresh Peppermint Long-Lasting Clean

YAYASHI$19.344.1★15 rev

Newest

by launch date

SP-4 Probiotic Whitening Toothpaste 4.23 Oz Ultra+ Probiotic-4 Toothpaste for Bright-Looking Smile and Fresh Breath (4.23 Oz Pack of 2)

MUZOIEU$8.970 rev

3w ago

3 Pcs SP-4 Oral Care Toothpaste Gently Polishes to Help Clean Surface Stains Double Peppermint for Long-Lasting Fresh Breath Daily Stain Protection for Oral Health 4.23 fl oz

Generic$9.981 rev

2mo ago

SP-4 Ultra Brightening Toothpaste Deep Cleaning Stain Removal Oral Care with Xylitol & Peppermint Fresh Breath Enamel Protection for Daily Use 120G

Generic$12.570 rev

3mo ago

YAYASHI SP-6 Probiotic Whitening Toothpaste Advanced Formula with 6 Probiotics for Brighter Teeth & Healthier Gums Enamel-Friendly Fresh Peppermint Long-Lasting Clean

YAYASHI$19.3415 rev

1y ago

SP-6 Probiotic Toothpaste - Niacinamide Whitening Toothpaste Enhanced Formula with 6 Probiotics for Teeth Whitening and Gum Health - Enamel-Safe Fluoride-Free Fresh Mint Flavor 4.9Oz (2)

Zaucet$14.39465 rev

1y ago

What buyers say about sp 4 ultra whitening

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

What buyers love

Quality-Overall22%

“no complaints”

Tooth Brightening21%

“Teeth appears a bit brighter”

Tooth Sensitivity10%

“Totally amazed at how well it works for sensitive teeth”

Efficiency8%

“Efficient”

Advertised Vs Actual Product7%

“As advertised”

Cleansing6%

“It cleans well”

Value For Money6%

“Much cheaper”

Ease Of Cleaning4%

“I'm giving the toothpaste 5 stars because it really cleans”

Brightness/Shine/Glow3%

“Nice Whitening”

Lather2%

“I like all the foam be ause it completely covers and treats my gums and they feel better and”

What buyers complain about

Functionality-Overall18%

“Didnt work”

Advertised Vs Actual Product12%

“Not as advertised”

Texture/Consistency-Overall9%

“has gummy texture”

Moist/Dry8%

“the toothpaste is dry”

Value For Money6%

“These are amazing a little expensive”

Ease Of Use5%

“hard to close and air gets in and product clumps up”

Hard Feel5%

“hard as a rock”

Color5%

“Not the color expected”

Ease Of Cleaning4%

“it does NOT leave a clean”

Jamming/Clogging4%

“the cap and dispenser need some work - I've purchased several and every one has a clogged dispenser/cap”

Top return reasons

Advertised Vs Actual Product40%

Functionality-Overall8%

Ingredients-Overall6%

Defective Material/Parts5%

Size-Overall5%

Smell4%

Ease Of Cleaning3%

Hard Feel3%

Ease Of Use3%

Ethically/Sustainably Sourced3%

Common questions

Is sp 4 ultra whitening profitable to sell on Amazon United States?: The niche generates $6K/yr across 16 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is -20.1%. Flapen's verdict: Skip it (44/100).
How competitive is the sp 4 ultra whitening niche?: 12 brands and 21 sellers compete. The top 5 products take 62% of clicks and top 5 brands hold 71% of demand.
What do buyers complain about in sp 4 ultra whitening?: Top complaints mined from reviews: Functionality-Overall, Advertised Vs Actual Product, Texture/Consistency-Overall. The return rate is 0.3%.
When does demand for sp 4 ultra whitening peak?: Demand peaks in Jan–Feb–Jul–Aug; the busiest month runs 3.4× the quietest.
What does it cost to enter the sp 4 ultra whitening niche?: Listings span $8.97–$25.33; the average listing price is $15.14 (sweet spot $15–$100). The average incumbent carries 432 reviews — the moat a new listing must climb.