---
title: "Castor Oil Soap — $58K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/beauty-personal-care/castor-oil-soap"
last_updated: "2026-08-10T15:30:38.307Z"
locale: en
meta:
description: "Niche score 50/100 · $58K/yr market · 24K searches/yr. 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 · $58K/yr market · 24K searches/yr. Brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Castor Oil Soap — $58K/yr Amazon US Niche (2026) - Flapen"
---
# **castor oil soap**
**Worth a look**
Shows searches that convert (14.6% search→purchase), but brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list.
Market size 15Growth 67Conversion 97Competition 29Returns 97Price range 71Avg price 78Brand share 0Review moat 21Quality gap 53
**Conversion**
**Incredible****14.6%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Incredible****0.6%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$16.37**
avg listing price — sweet spot $15–$100
**Price range**
**Good****$10.10–$27.19**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Good****+47.4%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Competition**
**Okay****68%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Bad****12,211.46**
avg incumbent reviews — the moat a new listing must climb
**Market size**
**Bad****$58K**
$58K/yr · 24K searches
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, castor oil soap is a $58K/yr Amazon United States market (24K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jan–Aug–Sep. Verdict: Worth a look — 50/100.
Data updated Jul 14, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **castor oil soap market data**
- **Units sold / yr**
- **3K–4K**
- avg 250–500/product
- **Revenue / yr**
- **$49K–$65K**
- units × avg price
- **Conversion rate**
- **14.6%**
- **Avg BSR**
- **#515**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **2.8%**
- **Avg brand age**
- **42 months**
- **Avg seller age**
- **141 days**
## **Competition & brand share**
The top 5 products take 68% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**4 **▼falling
**Sellers**
**10**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**68%**
Top 20: 100%
**Open market**
**0%**
- Kitsch86% - MARS MADE6% - Hair Thickness Maximizer6% - PureRootss3% - Open — no brand owns it (0%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +47.4% search growth over the last 90 days.
18K13KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Aug, Sep · busiest ÷ quietest = 20.5×
[**Open Trend **](https://flapen.com/research/us/beauty-personal-care/castor-oil-soap/trend)
## **Top castor oil soap search terms**
- **kitsch castor oil shampoo bar**8K/yr+215.0%10.6% conv. - **castor oil shampoo bar**11K/yr-9.7%7.2% conv. - **kitsch castor oil shampoo and conditioner bar**4K/yr+32.6%15.0% conv. - **castor oil bar shampoo**2K/yr-3.4%9.0% conv. - **castor oil shampoo bar for hair growth**472/yr-59.6%11.1% conv. [**All search terms **](https://flapen.com/research/us/beauty-personal-care/castor-oil-soap/search-terms)
## **Top castor oil soap 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%$6K20%$12K30%$17K40%$23K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 13 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Kitsch Castor Oil Shampoo Bar Soap - Hydrating & Moisturizing Hair Care - Organic Castor Oil Solid Shampoo for Hair Growth & Scalp Nourishment - Silicone & Paraben-Free Vegan - 3.2oz**Kitsch**$12.60**4.5★14,725 rev](https://www.amazon.com/dp/B08HQN3HV6) [2**Kitsch Castor Oil Shampoo and Conditioner Set - Organic Castor Oil Hair Care for Dull & Dry Hair - Nourishing Bar Soap for Hair Growth - Free of Sulfate Silicone & Paraben - 2pcs**Kitsch**$24.46**4.3★35,973 rev](https://www.amazon.com/dp/B0D5BX9H9K) [3**Kitsch Smoothing Castor Oil Liquid Shampoo Nourishing Hair Shampoo for Women & Men Smooths Dry Damaged & Frizzy Hair Clean Bio-Based Color-Safe Hair Care Made in USA 12.3 oz**Kitsch**$12.55**4.4★1,955 rev](https://www.amazon.com/dp/B0FWFDQ3HD) [4**Kitsch Castor Oil Conditioner Bar Soap - Hydrating & Moisturizing Hair Care - Organic Castor Oil Conditioner for Hair Growth & Scalp Nourishment - Silicone & Paraben-Free Vegan Made in USA - 2.7oz**Kitsch**$12.31**4.5★764 rev](https://www.amazon.com/dp/B0D45Z12LW) [5**Kitsch Smoothing Castor Oil Liquid Conditioner for Women and Men Nourishing Hair Conditioner for Dry Damaged & Frizzy Hair Clean Color-Safe Hair Care Bio-Based Formula Made in USA 12.3 oz**Kitsch**$12.33**4.4★141 rev](https://www.amazon.com/dp/B0FWG6VN87)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Kitsch Castor Oil Shampoo and Conditioner Set Nourishing Hair Care**Kitsch**$27.19**15 rev2mo ago](https://www.amazon.com/dp/B0H12T97WW) [**Kitsch Rosemary & Biotin Shampoo Bar - For Hair Growth Strengthening Thickening & Volumizing Shampoo for Women and Men - Free of Parabens Sulfates & Silicones - Made in USA 3.5 oz**Kitsch**$12.69**14,725 rev4mo ago](https://www.amazon.com/dp/B0GNP1CMWZ) [**Kitsch Smoothing Castor Oil Liquid Shampoo Nourishing Hair Shampoo for Women & Men Smooths Dry Damaged & Frizzy Hair Clean Bio-Based Color-Safe Hair Care Made in USA 12.3 oz**Kitsch**$12.55**1,955 rev9mo ago](https://www.amazon.com/dp/B0FWFDQ3HD) [**Kitsch Smoothing Castor Oil Liquid Conditioner for Women and Men Nourishing Hair Conditioner for Dry Damaged & Frizzy Hair Clean Color-Safe Hair Care Bio-Based Formula Made in USA 12.3 oz**Kitsch**$12.33**141 rev9mo ago](https://www.amazon.com/dp/B0FWG6VN87) [**Kitsch Argan Oil Shampoo Bar for Hair Growth Repairing Hair Shampoo for Women & Men Strengthening & Moisturizing Hair Care Paraben Phthalates Silicone & Sulfate Free - Made in USA 3.2 oz**Kitsch**$12.22**14,725 rev1y ago](https://www.amazon.com/dp/B0DW9JD5X7)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Kitsch Castor Oil Shampoo and Conditioner Set Nourishing Hair Care**Kitsch**$27.19**4.8★**▲ 258%**](https://www.amazon.com/dp/B0H12T97WW) [**Kitsch Rosemary & Biotin Shampoo Bar - For Hair Growth Strengthening Thickening & Volumizing Shampoo for Women and Men - Free of Parabens Sulfates & Silicones - Made in USA 3.5 oz**Kitsch**$12.69**4.5★**▲ 236%**](https://www.amazon.com/dp/B0GNP1CMWZ) [**Kitsch Smoothing Castor Oil Liquid Conditioner for Women and Men Nourishing Hair Conditioner for Dry Damaged & Frizzy Hair Clean Color-Safe Hair Care Bio-Based Formula Made in USA 12.3 oz**Kitsch**$12.33**4.4★**▲ 143%**](https://www.amazon.com/dp/B0FWG6VN87) [**Kitsch Argan Oil Shampoo Bar for Hair Growth Repairing Hair Shampoo for Women & Men Strengthening & Moisturizing Hair Care Paraben Phthalates Silicone & Sulfate Free - Made in USA 3.2 oz**Kitsch**$12.22**4.5★**▲ 142%**](https://www.amazon.com/dp/B0DW9JD5X7) [**Kitsch Smoothing Castor Oil Liquid Shampoo Nourishing Hair Shampoo for Women & Men Smooths Dry Damaged & Frizzy Hair Clean Bio-Based Color-Safe Hair Care Made in USA 12.3 oz**Kitsch**$12.55**4.4★**▲ 126%**](https://www.amazon.com/dp/B0FWFDQ3HD)
**~~View all trending →~~**
## **What buyers say about castor oil soap**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Smell**20%
*“Excelente aroma”*
**Lather**13%
*“Good lather”*
**Soft Feel**12%
*“Leaves hair soft”*
**Quality-Overall**8%
*“Excellent line of products”*
**Hair Growth**7%
*“It has made a huge difference my hair routine”*
**Cleansing**6%
*“rinses cleanly”*
**Ease Of Use**3%
*“Easy to use”*
**Hair Styling**3%
*“Honestly my hair feels so good”*
**Moist/Dry**3%
*“Very moisturizing”*
**Suitability Straight Hair**3%
*“Nice hair treat”*
### **What buyers complain about **
**Moist/Dry**10%
*“a little dry”*
**Smell**9%
*“Scent is too strong”*
**Hair Related**7%
*“Didnt work out for my hair”*
**Lather**7%
*“becomes even harder to lather”*
**Durability**6%
*“break in pieces”*
**Oily/Greasy**4%
*“it makes my hair so greasy”*
**Ease Of Use**4%
*“hard to use”*
**Value For Money**3%
*“Pricey”*
**Suitability Short Hair**3%
*“And you can't really use it very well because it gets snagged in your hair”*
**Ingredients-Overall**2%
*“Changed ingredients -not good anymore”*
### **Top return reasons **
**Smell**26%
**Advertised Vs Actual Product**11%
**Suitability Short Hair**9%
**Moist/Dry**7%
**Oily/Greasy**5%
**Defective Material/Parts**4%
**Functionality-Overall**4%
**Size-Overall**4%
**Value For Money**4%
**Lather**3%
## **Common questions**
- **Is castor oil soap profitable to sell on Amazon United States?**
- The niche generates $58K/yr across 13 tracked products. 3 of 4 products launched in the last 360 days are still selling. 90-day search growth is +47.4%. Flapen's verdict: Worth a look (50/100).
- **How competitive is the castor oil soap niche?**
- 4 brands and 10 sellers compete. The top 5 products take 68% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in castor oil soap?**
- Top complaints mined from reviews: Moist/Dry, Smell, Hair Related. The return rate is 0.6%.
- **When does demand for castor oil soap peak?**
- Demand peaks in Jan–Aug–Sep; the busiest month runs 20.5× the quietest.
- **What does it cost to enter the castor oil soap niche?**
- Listings span $10.10–$27.19; the average listing price is $16.37 (sweet spot $15–$100). The average incumbent carries 12,211 reviews — the moat a new listing must climb.
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