Is a22 biotin boost hair scalp serum profitable to sell on Amazon United States?

The niche generates $93K/yr across 11 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +102.4%. Flapen's verdict: Worth a look (56/100).

How competitive is the a22 biotin boost hair scalp serum niche?

11 brands and 247 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 82% of demand.

What do buyers complain about in a22 biotin boost hair scalp serum?

Top complaints mined from reviews: Smell, Hair Related, Functionality-Overall. The return rate is 1.0%.

What does it cost to enter the a22 biotin boost hair scalp serum niche?

Listings span $8.60–$69.63; the average listing price is $35.01 (sweet spot $15–$100). The average incumbent carries 2,720 reviews — the moat a new listing must climb.

a22 biotin boost hair scalp serum

Worth a look

Shows low returns (1.0%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Returns

Great1.0%

return rate — above 5% kills the launch gate

Avg price

Incredible$35.01

avg listing price — sweet spot $15–$100

Quality gap

Great4.0★

avg incumbent rating — lower means beatable quality

Growth

Great+102.4%

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

Price range

Great$8.60–$69.63

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

Brand share

Okay82%

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

Review moat

Okay2,719.55

avg incumbent reviews — the moat a new listing must climb

Conversion

Okay2.2%

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

Market size

Bad$93K

$93K/yr · 123K searches

Competition

Bad82%

top-5 click share — a locked-up shelf

Signals Trending Low Review Barrier

According to Flapen's Amazon United States niche tracking, a22 biotin boost hair scalp serum is a $93K/yr Amazon United States market (123K searches/yr). The top 5 brands hold 82% of demand. Verdict: Worth a look — 56/100.

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

a22 biotin boost hair scalp serum market data

Units sold / yr: 3K–3K; avg 100–250/product
Revenue / yr: $88K–$105K; units × avg price
Conversion rate: 2.2%
Avg BSR: #1,004
Page quality: 0%
Prime: 73%
Sponsored: 82%
Out of stock: 6.7%
Avg brand age: 36 months
Avg seller age: 130 days

Competition & brand share

The top 5 products capture 82% of clicks — a locked-up shelf that new listings rarely crack.

Brands

11 falling

Sellers

247

Top-5 brand share

82%

Top 20: 100%

Top-5 click share

82%

Top 20: 100%

Open market

14%

SPOILEDCHILD40%
Psalmonica16%
SpoiledChild14%
The Spa Dr.7%
BELLISSO6%
RootStim4%
Open — no brand owns it (5 brands, 14%)

Demand

Weekly Amazon search volume, last 49 weeks — +102.4% search growth over the last 90 days.

Open Trend

Top a22 biotin boost hair scalp serum search terms

a22 biotin boost hair scalp serum47K/yr +165.4%1.4% conv.
a22 hair serum15K/yr +25.8%0.6% conv.
the spa dr hair serum31K/yr +57.5%1.3% conv.
spoiled child a22 biotin boost hair scalp serum6K/yr +52.1%1.3% conv.
spa dr hair serum3K/yr +605.1%1.5% conv.
the spa dr hair growth serum women5K/yr +198.3%1.0% conv.
the spa doctor hair serum4K/yr +53.3%1.2% conv.
spa doctor hair serum2K/yr +44.9%0.8% conv.
spa dr hair serum for woman7K/yr -53.3%0.9% conv.
dr spa hair serum2K/yr +6.9%2.9% conv.

All search terms

Top a22 biotin boost hair scalp serum 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 11 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

SPOILEDCHILD Hair Revitalizer: Natural Thickening & Growth Serum with Niacinamide Caffeine - A22 Boost for Hair and Scalp

SPOILEDCHILD$69.633.2★168 rev

Hair Growth Serum: Rosemary Batana Castor Oil Rice Water Biotin Hair Oils for Hair Growth - Hair Growth Thickening Product - Hair Loss Treatments for Women Men(50 ML)

Psalmonica$17.294.3★930 rev

SpoiledChild A22 Biotin Boost Hair + Scalp Serum - Biotin Niacinamide Rosemary Oil - Hair Growth Thickening & Scalp Health - Vegan & Paraben-Free - 50 ml Refill Capsule

SpoiledChild$54.933.7★46 rev

The Spa Dr. Hair Serum - Clean Hair Thickening Serum with Red Clover and Pea Sprout Extracts and Peptides - 1.5 Fl. Oz.

The Spa Dr.$58.743.8★35 rev

Biotin Hair Thickening Serum for Men and Women - Intense Strengthening Treatment Product with Natural Botanical Oil Blend to Help Boost Thin Hair - Repair Thinning Hair Increase Volume and Shine

BELLISSO$13.054.4★6,072 rev

Newest

by launch date

Hair Growth Serum Roll On with Rosemary Caffeine & Biotin Helps Support Fuller-Looking Hair Clean Non-Greasy Scalp Serum for Thinning Hair 1.08 Fl Oz

RootStim$13.6052 rev

5mo ago

The Spa Dr. Hair Serum - Clean Hair Thickening Serum with Red Clover and Pea Sprout Extracts and Peptides - 1.5 Fl. Oz.

The Spa Dr.$58.7435 rev

1y ago

Hair Growth Serum: Rosemary Batana Castor Oil Rice Water Biotin Hair Oils for Hair Growth - Hair Growth Thickening Product - Hair Loss Treatments for Women Men(50 ML)

Psalmonica$17.29930 rev

1y ago

Routine Wellness Anti-Thinning Shampoo and Conditioner Set for Thinning Hair - Biotin DHT Blocker Women & Men - Color Safe Shampoo for Hair Loss & Healthier Hair - Coconut & Vanilla (Pack of 2)

Routine Wellness$47.4413,240 rev

2y ago

Marc Anthony Grow Long Scalp & Hair Serum - Anti-Breakage Formula Nourish Strengthen & Hydrate Scalp & Hair Follicles - Natural Shine & Fuller-Looking Hair Strands from Root to Tip 2 fl oz

Marc Anthony$8.601,641 rev

2y ago

What buyers say about a22 biotin boost hair scalp serum

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

What buyers love

Hair Growth19%

“It helps your hair grow”

Smell17%

“Amazing smell”

Quality-Overall11%

“Excellent hair product”

Soft Feel7%

“Hair feels so soft”

Value For Money3%

“worth it”

Hair Styling3%

“My hair looks amazing”

Efficiency3%

“conditioner work well”

Suitability Straight Hair2%

“My hair is naturally straight and thin”

Thickness2%

“Product is spot on with anti- thinning”

Oily/Greasy2%

“Doesn't leave my hair greasy like other products”

What buyers complain about

Smell22%

“AWFUL SMELL”

Hair Related10%

“My hair looked awful”

Functionality-Overall6%

“Did nothing”

Allergies6%

“feeling like its blistering”

Value For Money5%

“Expensive”

Oily/Greasy5%

“Makes your hair greasy”

Moist/Dry4%

“dry after rinse”

Size-Overall3%

“the bottles are TINY”

Thickness3%

“And It was an uncombable thicket”

Damage/Burn Hair3%

“Made my hair fall out”

Top return reasons

Smell20%

Functionality-Overall10%

Oily/Greasy10%

Advertised Vs Actual Product8%

Damage/Burn Hair6%

Size-Overall5%

Value For Money4%

Product Condition4%

Suitability Short Hair4%

Moist/Dry3%

Common questions

Is a22 biotin boost hair scalp serum profitable to sell on Amazon United States?: The niche generates $93K/yr across 11 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +102.4%. Flapen's verdict: Worth a look (56/100).
How competitive is the a22 biotin boost hair scalp serum niche?: 11 brands and 247 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 82% of demand.
What do buyers complain about in a22 biotin boost hair scalp serum?: Top complaints mined from reviews: Smell, Hair Related, Functionality-Overall. The return rate is 1.0%.
What does it cost to enter the a22 biotin boost hair scalp serum niche?: Listings span $8.60–$69.63; the average listing price is $35.01 (sweet spot $15–$100). The average incumbent carries 2,720 reviews — the moat a new listing must climb.