---
title: "Kilgour Md Hair Serum Bundle — $1.3M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/beauty-personal-care/kilgour-md-hair-serum-bundle"
last_updated: "2026-08-11T16:57:05.172Z"
locale: en
meta:
description: "Niche score 50/100 · $1.3M/yr market. Brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 50/100 · $1.3M/yr market. Brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Kilgour Md Hair Serum Bundle — $1.3M/yr Amazon US Niche (2026) - Flapen"
---
# **kilgour md hair serum bundle**
**Worth a look**
Shows low returns (0.9%), but brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list.
Market size 83Growth 5Conversion 80Competition 3Returns 96Price range 95Avg price 92Brand share 0Review moat 25Quality gap 86
**Returns**
**Incredible****0.9%**
return rate — above 5% kills the launch gate
**Price range**
**Incredible****$22.56–$84.85**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Great****$53.22**
avg listing price — sweet spot $15–$100
**Quality gap**
**Great****4.1★**
avg incumbent rating — lower means beatable quality
**Market size**
**Great****$1.3M**
$1.3M/yr · 302K searches
**Conversion**
**Great****8.2%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Bad****4,201.67**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-40.8%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****97%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
**Signals**[** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")
According to Flapen's Amazon United States niche tracking, kilgour md hair serum bundle is a $1.3M/yr Amazon United States market (302K searches/yr). The top 5 brands hold 100% of demand. Verdict: Worth a look — 50/100.
Data updated Jul 14, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **kilgour md hair serum bundle market data**
- **Units sold / yr**
- **25K–30K**
- avg 2,500–3,000/product
- **Revenue / yr**
- **$1.3M–$1.6M**
- units × avg price
- **Conversion rate**
- **8.2%**
- **Avg BSR**
- **#29**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **6.2%**
- **Avg brand age**
- **43 months**
- **Avg seller age**
- **134 days**
## **Competition & brand share**
The top 5 products capture 97% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**3 **—flat
**Sellers**
**5**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**97%**
Top 20: 100%
**Open market**
**0%**
- Nutrafol71% - OUAI26% - The Ordinary3%
## **Demand**
Weekly Amazon search volume, last 44 weeks — -40.8% search growth over the last 90 days.
15K10KSpike '25Black Friday '25Spike '26Sep '25Oct '25Dec '25Feb '26Mar '26May '26
[**Open Trend **](https://flapen.com/research/us/beauty-personal-care/kilgour-md-hair-serum-bundle/trend)
## **Top kilgour md hair serum bundle search terms**
- **nutrafol hair serum**63K/yr-29.1%9.6% conv. - **nutrafol serum**37K/yr-25.4%10.9% conv. - **ouai scalp serum**48K/yr-38.1%8.0% conv. - **nutrafol women hair growth serum**15K/yr-22.0%8.3% conv. - **nutrafol hair serum for women**15K/yr-29.0%8.5% conv. - **le jardin switzerland hair serum**32K/yr-84.3%0.3% conv. - **nutrafol serum for women**13K/yr-24.9%10.1% conv. - **nutrafol women hair growth**8K/yr+5.1%3.1% conv. - **ouai hair serum**10K/yr-37.6%6.0% conv. - **champo hair serum**12K/yr-31.1%0.4% conv. [**All search terms **](https://flapen.com/research/us/beauty-personal-care/kilgour-md-hair-serum-bundle/search-terms)
## **Top kilgour md hair serum bundle 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%15%$197K30%$395K45%$592K60%$790K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 6 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Nutrafol Womens Hair Serum Supports Visibly Thicker and Stronger Hair Vegan Lightweight and Fast-Absorbing - 1 Fl Oz 1 Bottle**Nutrafol**$47.26**4.1★3,392 rev](https://www.amazon.com/dp/B0D3QR9F9K) [2**OUAI Scalp Serum - Balancing Hair Serum with Red Clover Extract Siberian Ginseng and Peptides for Thicker and Fuller-Looking Hair - Paraben Phthalate and Sulfate Free Scalp Care (2 Fl Oz)**OUAI**$51.30**4.3★901 rev](https://www.amazon.com/dp/B0B137RLYG) [3**Nutrafol Women Hair Serum for Thinning Hair Clinically Tested to Support Visibly Thicker Stronger-Feeling Hair Vegan Lightweight and Fast-Absorbing 1.7 fl oz 1 Bottle**Nutrafol**$65.89**4.1★3,392 rev](https://www.amazon.com/dp/B094SM4H3L) [4**Nutrafol Mens Hair Serum Clinically Tested to Support Visibly Thicker Hair and Scalp Coverage Lightweight and Non-Greasy for Daily Use - 30mL 1 Bottle**Nutrafol**$47.43**4.0★261 rev](https://www.amazon.com/dp/B0D3SPHTHS) [5**Nutrafol Womens Balance Hair Growth Supplements Ages 45 and Up Clinically Tested for Visibly Thicker Hair and Scalp Coverage Dermatologist Recommended - 1 Month Supply**Nutrafol**$84.85**4.2★15,776 rev](https://www.amazon.com/dp/B07QZ5CTTF)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Nutrafol Mens Hair Serum Clinically Tested to Support Visibly Thicker Hair and Scalp Coverage Lightweight and Non-Greasy for Daily Use - 30mL 1 Bottle**Nutrafol**$47.43**261 rev2y ago](https://www.amazon.com/dp/B0D3SPHTHS) [**Nutrafol Womens Hair Serum Supports Visibly Thicker and Stronger Hair Vegan Lightweight and Fast-Absorbing - 1 Fl Oz 1 Bottle**Nutrafol**$47.26**3,392 rev2y ago](https://www.amazon.com/dp/B0D3QR9F9K) [**OUAI Scalp Serum - Balancing Hair Serum with Red Clover Extract Siberian Ginseng and Peptides for Thicker and Fuller-Looking Hair - Paraben Phthalate and Sulfate Free Scalp Care (2 Fl Oz)**OUAI**$51.30**901 rev4y ago](https://www.amazon.com/dp/B0B137RLYG) [**The Ordinary Multi-Peptide Serum for Hair Density Peptide-Powered Formula for Thicker Fuller Looking Hair 2 Fl Oz**The Ordinary**$22.56**1,488 rev4y ago](https://www.amazon.com/dp/B09WMT8HYB) [**Nutrafol Women Hair Serum for Thinning Hair Clinically Tested to Support Visibly Thicker Stronger-Feeling Hair Vegan Lightweight and Fast-Absorbing 1.7 fl oz 1 Bottle**Nutrafol**$65.89**3,392 rev5y ago](https://www.amazon.com/dp/B094SM4H3L)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Nutrafol Womens Hair Serum Supports Visibly Thicker and Stronger Hair Vegan Lightweight and Fast-Absorbing - 1 Fl Oz 1 Bottle**Nutrafol**$47.26**4.1★**▲ 20%**](https://www.amazon.com/dp/B0D3QR9F9K) [**Nutrafol Mens Hair Serum Clinically Tested to Support Visibly Thicker Hair and Scalp Coverage Lightweight and Non-Greasy for Daily Use - 30mL 1 Bottle**Nutrafol**$47.43**4.0★**— 10%**](https://www.amazon.com/dp/B0D3SPHTHS) [**Nutrafol Womens Balance Hair Growth Supplements Ages 45 and Up Clinically Tested for Visibly Thicker Hair and Scalp Coverage Dermatologist Recommended - 1 Month Supply**Nutrafol**$84.85**4.2★**— 1%**](https://www.amazon.com/dp/B07QZ5CTTF) [**OUAI Scalp Serum - Balancing Hair Serum with Red Clover Extract Siberian Ginseng and Peptides for Thicker and Fuller-Looking Hair - Paraben Phthalate and Sulfate Free Scalp Care (2 Fl Oz)**OUAI**$51.30**4.3★**— 7%**](https://www.amazon.com/dp/B0B137RLYG) [**Nutrafol Women Hair Serum for Thinning Hair Clinically Tested to Support Visibly Thicker Stronger-Feeling Hair Vegan Lightweight and Fast-Absorbing 1.7 fl oz 1 Bottle**Nutrafol**$65.89**4.1★**▼ 11%**](https://www.amazon.com/dp/B094SM4H3L)
**~~View all trending →~~**
## **What buyers say about kilgour md hair serum bundle**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Hair Growth**36%
*“That the product truly delivers serious hair growth”*
**Quality-Overall**18%
*“it has pretty great reviews”*
**Value For Money**8%
*“Worth the money”*
**Smell**4%
*“Smells nice and easy to apply, doesn't leave oily residue”*
**Thickness**3%
*“I get a lot of compliments in how much thicker my hair is”*
**Ease Of Use**2%
*“Its easy to use”*
**Advertised Vs Actual Product**2%
*“It all works as it should”*
**Symptom Reduction**2%
*“have seen significant results”*
**Suitability Straight Hair**2%
*“Highly recommend for anyone looking to support healthier, fuller-looking hair”*
**Side Effects**1%
*“I have now been using this product for just over a year and have seen significant results”*
### **What buyers complain about **
**Value For Money**22%
*“Expensive”*
**Functionality-Overall**14%
*“No result at all”*
**Side Effects**10%
*“started feeling bad”*
**Hair Related**9%
*“My hair was falling out by handfuls for months”*
**Allergies**5%
*“it so so so itchy it bothered me all day”*
**Oily/Greasy**4%
*“A bit oily”*
**Smell**4%
*“it has a very pungent odor”*
**Symptom Reduction**3%
*“No Positive Results Yet”*
**Size-Overall**3%
*“small”*
**Thickness**2%
*“thicker hair”*
### **Top return reasons **
**Functionality-Overall**18%
**Value For Money**12%
**Advertised Vs Actual Product**11%
**Oily/Greasy**8%
**Smell**7%
**Side Effects**6%
**Product Condition**5%
**Damage/Burn Hair**5%
**Defective Material/Parts**4%
**Size-Overall**4%
## **Common questions**
- **Is kilgour md hair serum bundle profitable to sell on Amazon United States?**
- The niche generates $1.3M/yr across 6 tracked products. 90-day search growth is -40.8%. Flapen's verdict: Worth a look (50/100).
- **How competitive is the kilgour md hair serum bundle niche?**
- 3 brands and 5 sellers compete. The top 5 products take 97% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in kilgour md hair serum bundle?**
- Top complaints mined from reviews: Value For Money, Functionality-Overall, Side Effects. The return rate is 0.9%.
- **What does it cost to enter the kilgour md hair serum bundle niche?**
- Listings span $22.56–$84.85; the average listing price is $53.22 (sweet spot $15–$100). The average incumbent carries 4,202 reviews — the moat a new listing must climb.
## **Related niches in Beauty & Personal Care**
- 75 [**bio oil lotion**](https://flapen.com/research/us/beauty-personal-care/bio-oil-lotion)$654K/yr+95.9%**Worth a look**- 75 [**glossier futuredew serum**](https://flapen.com/research/us/beauty-personal-care/glossier-futuredew-serum)$344K/yr+383.6%**Worth a look**- 75 [**press on toenails**](https://flapen.com/research/us/beauty-personal-care/press-on-toenails)$2.4M/yr+79.4%**Launch it**- 75 [**skulta deep peptide eye mask**](https://flapen.com/research/us/beauty-personal-care/skulta-deep-peptide-eye-mask)$58K/yr>1,000%**Worth a look**- 75 [**mineral sunscreen spray**](https://flapen.com/research/us/beauty-personal-care/mineral-sunscreen-spray)$3.8M/yr+183.8%**Launch it**- 76 [**collagen oil**](https://flapen.com/research/us/beauty-personal-care/collagen-oil)$344K/yr+116.2%**Worth a look**[**All Beauty & Personal Care niches **](https://flapen.com/research/us/beauty-personal-care)