---
title: "A22 Biotin Boost Hair Scalp Serum — $93K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/beauty-personal-care/a22-biotin-boost-hair-scalp-serum"
last_updated: "2026-08-09T03:54:56.342Z"
locale: en
meta:
description: "Niche score 56/100 · $93K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 56/100 · $93K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "A22 Biotin Boost Hair Scalp Serum — $93K/yr Amazon US Niche (2026) - Flapen"
---
# **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.
Market size 23Growth 92Conversion 27Competition 15Returns 95Price range 87Avg price 95Brand share 39Review moat 38Quality gap 94
**Returns**
**Great****1.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****$35.01**
avg listing price — sweet spot $15–$100
**Quality gap**
**Great****4.0★**
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**
**Okay****82%**
top-5 brand share — brands hold most of the demand
**Review moat**
**Okay****2,719.55**
avg incumbent reviews — the moat a new listing must climb
**Conversion**
**Okay****2.2%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Bad****$93K**
$93K/yr · 123K searches
**Competition**
**Bad****82%**
top-5 click share — a locked-up shelf
**Signals**[** Trending**](https://flapen.com/research/niches?market=us&signal=trending "Search growth > 100% (90d)") [** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500")
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 ~~](https://flapen.com/research/methodology)
## **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.
7K5KSpike '25Spike '26Aug '25Sep '25Nov '25Jan '26Mar '26May '26
[**Open Trend **](https://flapen.com/research/us/beauty-personal-care/a22-biotin-boost-hair-scalp-serum/trend)
## **Top a22 biotin boost hair scalp serum search terms**
- **a22 biotin boost hair scalp serum**47K/yr+165.4%1.4% conv. - **a22 hair serum**15K/yr+25.8%0.6% conv. - **the spa dr hair serum**31K/yr+57.5%1.3% conv. - **spoiled child a22 biotin boost hair scalp serum**6K/yr+52.1%1.3% conv. - **spa dr hair serum**3K/yr+605.1%1.5% conv. - **the spa dr hair growth serum women**5K/yr+198.3%1.0% conv. - **the spa doctor hair serum**4K/yr+53.3%1.2% conv. - **spa doctor hair serum**2K/yr+44.9%0.8% conv. - **spa dr hair serum for woman**7K/yr-53.3%0.9% conv. - **dr spa hair serum**2K/yr+6.9%2.9% conv. [**All search terms **](https://flapen.com/research/us/beauty-personal-care/a22-biotin-boost-hair-scalp-serum/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.
0%10%$9K20%$19K30%$28K40%$37K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**SPOILEDCHILD Hair Revitalizer: Natural Thickening & Growth Serum with Niacinamide Caffeine - A22 Boost for Hair and Scalp**SPOILEDCHILD**$69.63**3.2★168 rev](https://www.amazon.com/dp/B0CKBJ8CMM) [2**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**$17.29**4.3★930 rev](https://www.amazon.com/dp/B0DSBHKGM6) [3**SpoiledChild A22 Biotin Boost Hair + Scalp Serum - Biotin Niacinamide Rosemary Oil - Hair Growth Thickening & Scalp Health - Vegan & Paraben-Free - 50 ml Refill Capsule**SpoiledChild**$54.93**3.7★46 rev](https://www.amazon.com/dp/B0FGG8SK67) [4**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.**$58.74**3.8★35 rev](https://www.amazon.com/dp/B0DKP456C1) [5**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**$13.05**4.4★6,072 rev](https://www.amazon.com/dp/B08Z5GK3HX)
**~~View all top sellers →~~**
### **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**$13.60**52 rev5mo ago](https://www.amazon.com/dp/B0GKWK5R42) [**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.**$58.74**35 rev1y ago](https://www.amazon.com/dp/B0DKP456C1) [**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**$17.29**930 rev1y ago](https://www.amazon.com/dp/B0DSBHKGM6) [**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**$47.44**13,240 rev2y ago](https://www.amazon.com/dp/B0CXX9PYY6) [**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**$8.60**1,641 rev2y ago](https://www.amazon.com/dp/B0CSG9XHM9)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**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**$13.60**4.5★**▲ 166%**](https://www.amazon.com/dp/B0GKWK5R42) [**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**$47.44**4.2★**▲ 125%**](https://www.amazon.com/dp/B0CXX9PYY6) [**SPOILEDCHILD Hair Revitalizer: Natural Thickening & Growth Serum with Niacinamide Caffeine - A22 Boost for Hair and Scalp**SPOILEDCHILD**$69.63**3.2★**▲ 117%**](https://www.amazon.com/dp/B0CKBJ8CMM) [**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**$13.05**4.4★**▲ 66%**](https://www.amazon.com/dp/B08Z5GK3HX) [**SpoiledChild A22 Biotin Boost Hair + Scalp Serum - Biotin Niacinamide Rosemary Oil - Hair Growth Thickening & Scalp Health - Vegan & Paraben-Free - 50 ml Refill Capsule**SpoiledChild**$54.93**3.7★**▲ 27%**](https://www.amazon.com/dp/B0FGG8SK67)
**~~View all trending →~~**
## **What buyers say about a22 biotin boost hair scalp serum**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Hair Growth**19%
*“It helps your hair grow”*
**Smell**17%
*“Amazing smell”*
**Quality-Overall**11%
*“Excellent hair product”*
**Soft Feel**7%
*“Hair feels so soft”*
**Value For Money**3%
*“worth it”*
**Hair Styling**3%
*“My hair looks amazing”*
**Efficiency**3%
*“conditioner work well”*
**Suitability Straight Hair**2%
*“My hair is naturally straight and thin”*
**Thickness**2%
*“Product is spot on with anti- thinning”*
**Oily/Greasy**2%
*“Doesn't leave my hair greasy like other products”*
### **What buyers complain about **
**Smell**22%
*“AWFUL SMELL”*
**Hair Related**10%
*“My hair looked awful”*
**Functionality-Overall**6%
*“Did nothing”*
**Allergies**6%
*“feeling like its blistering”*
**Value For Money**5%
*“Expensive”*
**Oily/Greasy**5%
*“Makes your hair greasy”*
**Moist/Dry**4%
*“dry after rinse”*
**Size-Overall**3%
*“the bottles are TINY”*
**Thickness**3%
*“And It was an uncombable thicket”*
**Damage/Burn Hair**3%
*“Made my hair fall out”*
### **Top return reasons **
**Smell**20%
**Functionality-Overall**10%
**Oily/Greasy**10%
**Advertised Vs Actual Product**8%
**Damage/Burn Hair**6%
**Size-Overall**5%
**Value For Money**4%
**Product Condition**4%
**Suitability Short Hair**4%
**Moist/Dry**3%
## **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.
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