---
title: "K18 Hair Oil — $595K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/beauty-personal-care/k18-hair-oil"
last_updated: "2026-08-11T17:47:49.566Z"
locale: en
meta:
description: "Niche score 48/100 · $595K/yr market · 232K searches/yr · $32.37 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 48/100 · $595K/yr market · 232K searches/yr · $32.37 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "K18 Hair Oil — $595K/yr Amazon US Niche (2026) - Flapen"
---
# **k18 hair oil**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 64Growth 23Conversion 79Competition 6Returns 91Price range 95Avg price 95Brand share 0Review moat 20Quality gap 70
**Avg price**
**Incredible****$32.37**
avg listing price — sweet spot $15–$100
**Price range**
**Incredible****$18.96–$60.75**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Returns**
**Great****1.2%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****7.9%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Market size**
**Good****$595K**
$595K/yr · 232K searches
**Growth**
**Bad****-3.0%**
90-day search growth — must beat 0% to launch
**Review moat**
**Bad****13,008.75**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Bad****93%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, k18 hair oil is a $595K/yr Amazon United States market (232K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 48/100.
Data updated Jul 14, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **k18 hair oil market data**
- **Units sold / yr**
- **15K–20K**
- avg 2,000–2,500/product
- **Revenue / yr**
- **$486K–$647K**
- units × avg price
- **Conversion rate**
- **7.9%**
- **Avg BSR**
- **#31**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **5.5%**
- **Avg brand age**
- **51 months**
- **Avg seller age**
- **140 days**
## **Competition & brand share**
The top 5 products capture 93% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**3 **—flat
**Sellers**
**34**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**93%**
Top 20: 100%
**Open market**
**0%**
- K1879% - BASK & LATHER13% - Olaplex7%
## **Demand & seasonality**
Weekly Amazon search volume, last 96 weeks — -3.0% search growth over the last 90 days.
7K5KSpike '24Holiday '24Prime Day '25Spike '25Black Friday '25Spike '26 seasonDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.8×
[**Open Trend **](https://flapen.com/research/us/beauty-personal-care/k18-hair-oil/trend)
## **Top k18 hair oil search terms**
- **k18 oil**32K/yr+41.9%8.4% conv. - **k18 hair oil**78K/yr-38.4%7.1% conv. - **k18 molecular repair hair oil**20K/yr+141.3%8.6% conv. - **scalp stimulator hair growth oil**50K/yr-25.9%3.8% conv. - **cecred hair oil**36K/yr+1.4%0.6% conv. - **k18 serum**3K/yr+34.9%4.0% conv. - **k 18 hair oil**4K/yr-20.6%8.2% conv. - **hair oil k18**2K/yr+0.6%8.2% conv. - **jumbo scalp stimulator**4K/yr-43.8%8.6% conv. - **cecreed hair oil**3K/yr-71.1%0.0% conv. [**All search terms **](https://flapen.com/research/us/beauty-personal-care/k18-hair-oil/search-terms)
## **Top k18 hair oil 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%$89K30%$178K45%$268K60%$357K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 8 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**K18 Molecular Repair Hair Oil - Strengthening Peptide Damaged Hair Treatment Oil - 24-Hour Frizz Control + Heat Protectant - Helps Reduce Split Ends + Boost Shine (0.34 Fl oz)**K18**$25.60**4.3★2,876 rev](https://www.amazon.com/dp/B0CD84PNDD) [2**K18 Molecular Repair Hair Oil - Strengthening Peptide Damaged Hair Treatment Oil - 24-Hour Frizz Control + Heat Protectant - Helps Reduce Split Ends + Boost Shine (1 Fl oz)**K18**$60.75**4.3★2,876 rev](https://www.amazon.com/dp/B0BYT7QCFB) [3**Bask & Lather Scalp Stimulator Hair Growth Oil Cold Pressed Mint and Rosemary Blend with Grapeseed for Hair Growth Organic Natural Leave in All Hair Types 2 Fl Oz**BASK & LATHER**$21.09**4.3★2,030 rev](https://www.amazon.com/dp/B0CFYS7M4L) [4**Olaplex No. 7 Bonding Oil Concentrated High Shine Oil Heat Protectant Visibly Smooths & Softens Hair Added Color Vibrancy Up to 72 Hour Frizz Control For All Hair Types 1 fl oz**Olaplex**$26.72**4.7★60,796 rev](https://www.amazon.com/dp/B07VR1NDSQ) [5**Bask & Lather Scalp Stimulator Hair Growth Oil Cold Pressed Mint and Rosemary Blend with Grapeseed for Hair Growth Organic Natural Leave in All Hair Types 4 Fl Oz**BASK & LATHER**$33.02**4.2★711 rev](https://www.amazon.com/dp/B0CBQJGPSB)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**K18 Molecular Repair Minis Kit Leave-In Molecular Hair Mask + Lightweight Repair Oil Repairing Hair Duo to Strengthen + Smooth Frizz Suitable for All Hair Types Travel Size Kit**K18**$44.05**2,876 rev10mo ago](https://www.amazon.com/dp/B0F9B58H79) [**Bask & Lather Stimulating Scalp and Hair Balm for Hair Growth Mango & Shea Butter Nourishing Jojoba Oil Peppermint & Rosemary Oil Vitamin E Scalp Care Hair Care Moisture Shine & Strength 6 oz**BASK & LATHER**$18.96**1,617 rev1y ago](https://www.amazon.com/dp/B0DSCKBJLD) [**K18 Molecular Repair Hair Oil - Strengthening Peptide Damaged Hair Treatment Oil - 24-Hour Frizz Control + Heat Protectant - Helps Reduce Split Ends + Boost Shine (0.34 Fl oz)**K18**$25.60**2,876 rev2y ago](https://www.amazon.com/dp/B0CD84PNDD) [**Bask & Lather Scalp Stimulator Hair Growth Oil Cold Pressed Mint and Rosemary Blend with Grapeseed for Hair Growth Organic Natural Leave in All Hair Types 2 Fl Oz**BASK & LATHER**$21.09**2,030 rev2y ago](https://www.amazon.com/dp/B0CFYS7M4L) [**Bask & Lather Scalp Stimulator Hair Growth Oil Cold Pressed Mint and Rosemary Blend with Grapeseed for Hair Growth Organic Natural Leave in All Hair Types 4 Fl Oz**BASK & LATHER**$33.02**711 rev2y ago](https://www.amazon.com/dp/B0CBQJGPSB)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Bask & Lather Scalp Stimulator Hair Growth Oil Cold Pressed Mint and Rosemary Blend with Grapeseed for Hair Growth Organic Natural Leave in All Hair Types 4 Fl Oz**BASK & LATHER**$33.02**4.2★**▲ 76%**](https://www.amazon.com/dp/B0CBQJGPSB) [**K18 Molecular Repair Hair Oil - Strengthening Peptide Damaged Hair Treatment Oil - 24-Hour Frizz Control + Heat Protectant - Helps Reduce Split Ends + Boost Shine (1 Fl oz)**K18**$60.75**4.3★**▲ 66%**](https://www.amazon.com/dp/B0BYT7QCFB) [**Olaplex No. 7 Bonding Oil Concentrated High Shine Oil Heat Protectant Visibly Smooths & Softens Hair Added Color Vibrancy Up to 72 Hour Frizz Control For All Hair Types 1 fl oz**Olaplex**$26.72**4.7★**▲ 17%**](https://www.amazon.com/dp/B07VR1NDSQ) [**K18 Molecular Repair Hair Oil - Strengthening Peptide Damaged Hair Treatment Oil - 24-Hour Frizz Control + Heat Protectant - Helps Reduce Split Ends + Boost Shine (0.34 Fl oz)**K18**$25.60**4.3★**— 9%**](https://www.amazon.com/dp/B0CD84PNDD) [**K18 Molecular Repair Minis Kit Leave-In Molecular Hair Mask + Lightweight Repair Oil Repairing Hair Duo to Strengthen + Smooth Frizz Suitable for All Hair Types Travel Size Kit**K18**$44.05**4.3★**▼ 26%**](https://www.amazon.com/dp/B0F9B58H79)
**~~View all trending →~~**
## **What buyers say about k18 hair oil**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**17%
*“Excellent Product”*
**Hair Growth**15%
*“It helps hair growth”*
**Smell**11%
*“Nice refreshing scent”*
**Soft Feel**8%
*“My hair is soft”*
**Moist/Dry**5%
*“Great moisturizer”*
**Value For Money**5%
*“Definitely worth the price”*
**Hair Styling**4%
*“helping to style”*
**Advertised Vs Actual Product**3%
*“As advertised”*
**Suitability Straight Hair**3%
*“Its grows my hair”*
**Brightness/Shine/Glow**3%
*“Love the shine”*
### **What buyers complain about **
**Value For Money**17%
*“It is expensive”*
**Size-Overall**11%
*“Extremely small”*
**Allergies**7%
*“Irritation”*
**Hair Related**6%
*“This product damaged my hair”*
**Functionality-Overall**6%
*“Unfortunately no good results”*
**Moist/Dry**5%
*“Hair was rough and dry”*
**Oily/Greasy**5%
*“Very greasy”*
**Smell**5%
*“hate the smell”*
**Damage/Burn Hair**4%
*“can break your hair”*
**Suitability Short Hair**3%
*“Im very sorry to say that this product did absolutely nothing for my hair”*
### **Top return reasons **
**Size-Overall**22%
**Functionality-Overall**11%
**Value For Money**9%
**Advertised Vs Actual Product**8%
**Smell**7%
**Oily/Greasy**6%
**Suitability Short Hair**5%
**Damage/Burn Hair**4%
**Product Condition**4%
**Moist/Dry**3%
## **Common questions**
- **Is k18 hair oil profitable to sell on Amazon United States?**
- The niche generates $595K/yr across 8 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -3.0%. Flapen's verdict: Skip it (48/100).
- **How competitive is the k18 hair oil niche?**
- 3 brands and 34 sellers compete. The top 5 products take 93% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in k18 hair oil?**
- Top complaints mined from reviews: Value For Money, Size-Overall, Allergies. The return rate is 1.2%.
- **When does demand for k18 hair oil peak?**
- Demand is steady year-round — the busiest month runs 1.8× the quietest.
- **What does it cost to enter the k18 hair oil niche?**
- Listings span $18.96–$60.75; the average listing price is $32.37 (sweet spot $15–$100). The average incumbent carries 13,009 reviews — the moat a new listing must climb.
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