Is k12 profitable to sell on Amazon United States?

The niche generates $130K/yr across 7 tracked products. 90-day search growth is -5.8%. Flapen's verdict: Skip it (47/100).

How competitive is the k12 niche?

5 brands and 24 sellers compete. The top 5 products take 92% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in k12?

Top complaints mined from reviews: Functionality-Overall, Taste-Overall, Value For Money. The return rate is 0.0%.

When does demand for k12 peak?

Demand peaks in Dec; the busiest month runs 1.6× the quietest.

What does it cost to enter the k12 niche?

Listings span $15.11–$37.85; the average listing price is $25.60 (sweet spot $15–$100). The average incumbent carries 2,596 reviews — the moat a new listing must climb.

K12

Skip it

Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Incredible12.6%

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

Avg price

Incredible$25.60

avg listing price — sweet spot $15–$100

Price range

Incredible$15.11–$37.85

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

Quality gap

Great4.3★

avg incumbent rating — lower means beatable quality

Review moat

Okay2,596.14

avg incumbent reviews — the moat a new listing must climb

Market size

Okay$130K

$130K/yr · 41K searches

Growth

Bad-5.8%

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

Competition

Bad92%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

Is k12 profitable on Amazon?

According to Flapen's Amazon United States niche tracking, k12 is a $130K/yr Amazon United States market (41K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Dec. Verdict: Skip it — 47/100.

Data updated Jul 25, 2026 · scored weekly · How we score niches

k12 market size & sales

Units sold, revenue, conversion and listing quality across the tracked shelf.

Units sold / yr: 4K–5K; avg 250–500/product
Revenue / yr: $102K–$128K; units × avg price
Conversion rate: 12.6%
Avg BSR: #1,223
Page quality: 0%
Prime: 100%
Sponsored: 86%
Out of stock: 0.0%
Avg brand age: 72 months
Avg seller age: 172 days

Competition: brands, sellers & click share

The top 5 products capture 92% of clicks — a locked-up shelf that new listings rarely crack.

Brands

5 flat

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

92%

Top 20: 100%

Open market

NOW Foods66%
BLIS19%
Hyperbiotics5%
Great Oral Health5%
BioGaia5%

k12 demand & seasonality

Weekly Amazon search volume, last 104 weeks — -5.8% search growth over the last 90 days.

Peak months: Dec · busiest ÷ quietest = 1.6×

Open Trend

Top k12 search terms shoppers use

The exact queries shoppers type, with yearly volume, growth and conversion.

blis k1214K/yr -2.1%5.4% conv.
now oralbiotic9K/yr -36.1%18.6% conv.
oralbiotic6K/yr +18.8%13.9% conv.
oral biotic5K/yr +20.1%10.8% conv.
k12 probiotic4K/yr -23.5%3.9% conv.
blis k12 oral probiotic3K/yr +57.6%4.7% conv.

All search terms

Top k12 products & what they sell for

Every tracked product — its share of the shelf, its review moat, and what it sells for.

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

Top sellers

by 90-day click share

NOW Foods Supplements OralBiotic Developed for Adults & Children Strain Verified 60 Lozenges

NOW Foods$15.114.2★2,586 rev

BLIS Throat Health Oral Probiotics K12 Immune Support 60 Vanilla Lozenges

BLIS$33.344.4★154 rev

Hyperbiotics Vital Nutrients Pro Dental Probiotic | Clinically Studied BLIS K12 and M18 | Oral Probiotics for Bad Breath Treatment for Adults | Oral Health for Teeth and Gums | 45 Mint Tablets

Hyperbiotics$30.144.0★6,567 rev

NOW Foods - Oralbiotic Blis K12(R) 60 LOZ (Pack of 3)

NOW Foods$37.854.4★197 rev

Oral Probiotics for Mouth Bad Breath Treatment for Adults; Dentist Formulated Dental Probiotics for Teeth and Gums Health & Chronic Halitosis with BLIS K12 M18 60 Chewable Oral Health Tablets Mint

Great Oral Health$27.824.2★6,012 rev

Newest

by launch date

BLIS Throat Health Oral Probiotics K12 Immune Support 60 Vanilla Lozenges

BLIS$33.34154 rev

2y ago

BioGaia$19.632,371 rev

7y ago

BLIS HoneyBLIS Oral Probiotics Manuka Honey K12 Throat Soothe 16 Lozenges

BLIS$15.33286 rev

8y ago

Hyperbiotics Vital Nutrients Pro Dental Probiotic | Clinically Studied BLIS K12 and M18 | Oral Probiotics for Bad Breath Treatment for Adults | Oral Health for Teeth and Gums | 45 Mint Tablets

Hyperbiotics$30.146,567 rev

11y ago

Oral Probiotics for Mouth Bad Breath Treatment for Adults; Dentist Formulated Dental Probiotics for Teeth and Gums Health & Chronic Halitosis with BLIS K12 M18 60 Chewable Oral Health Tablets Mint

Great Oral Health$27.826,012 rev

12y ago

What reviews say buyers love and hate about k12

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

What buyers love

Oral Hygiene23%

“Helps maintain healthy teeth and gums”

Taste-Overall13%

“Great taste”

Quality-Overall9%

“Excellent product”

Efficiency8%

“Effective”

Breathability8%

“My breath feels fresher”

Advertised Vs Actual Product4%

“works as advertised”

Regulates Digestion4%

“what I have noticed is that this probiotic helps keep my bowels moving”

Smell3%

“Eliminate mouth odor”

Flavor3%

“Both flavors are good”

Value For Money2%

“Value”

What buyers complain about

Functionality-Overall16%

“Did not work”

Taste-Overall14%

“tastes terrible”

Value For Money10%

“Overpriced”

Solubility5%

“They did not dissolve”

Oral Hygiene4%

“My dental hygienist had to hunt for plaque on my teeth”

Pain Relief-Overall4%

“Made my gums hurt”

Moist/Dry3%

“my mouth was so dry”

Natural Ingredients3%

“I am shocked to report that this product defies that natural law”

Acid Regulator/Stomach Ache Relief3%

“These made my stomach hurt so bad all night after I took them”

Allergies3%

“Broke out in a rash from the product”

Top return reasons

Advertised Vs Actual Product50%

Water Resistance50%

Common k12 questions

Is k12 profitable to sell on Amazon United States?: The niche generates $130K/yr across 7 tracked products. 90-day search growth is -5.8%. Flapen's verdict: Skip it (47/100).
How competitive is the k12 niche?: 5 brands and 24 sellers compete. The top 5 products take 92% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in k12?: Top complaints mined from reviews: Functionality-Overall, Taste-Overall, Value For Money. The return rate is 0.0%.
When does demand for k12 peak?: Demand peaks in Dec; the busiest month runs 1.6× the quietest.
What does it cost to enter the k12 niche?: Listings span $15.11–$37.85; the average listing price is $25.60 (sweet spot $15–$100). The average incumbent carries 2,596 reviews — the moat a new listing must climb.

K12