Is castor oil shampoo profitable to sell on Amazon United States?

The niche generates $134K/yr across 25 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is -4.7%. Flapen's verdict: Worth a look (53/100).

How competitive is the castor oil shampoo niche?

13 brands and 637 sellers compete. The top 5 products take 51% of clicks and top 5 brands hold 78% of demand.

What do buyers complain about in castor oil shampoo?

Top complaints mined from reviews: Smell, Hair Related, Moist/Dry. The return rate is 0.8%.

When does demand for castor oil shampoo peak?

Demand peaks in Sep; the busiest month runs 2.8× the quietest.

What does it cost to enter the castor oil shampoo niche?

Listings span $6.90–$28.93; the average listing price is $17.59 (sweet spot $15–$100). The average incumbent carries 7,938 reviews — the moat a new listing must climb.

castor oil shampoo

Worth a look

Shows low returns (0.8%), but soft demand (-4.7% this quarter) keeps it on the watch list.

Returns

Incredible0.8%

return rate — above 5% kills the launch gate

Conversion

Great8.5%

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

Avg price

Great$17.59

avg listing price — sweet spot $15–$100

Price range

Good$6.90–$28.93

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

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Competition

Good51%

top-5 click share — leaders hold, buyers still browse

Brand share

Okay78%

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

Market size

Okay$134K

$134K/yr · 90K searches

Growth

Bad-4.7%

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

Review moat

Bad7,938.24

avg incumbent reviews — the moat a new listing must climb

According to Flapen's Amazon United States niche tracking, castor oil shampoo is a $134K/yr Amazon United States market (90K searches/yr). The top 5 brands hold 78% of demand. Demand peaks in Sep. Verdict: Worth a look — 53/100.

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

castor oil shampoo market data

Units sold / yr: 6K–8K; avg 100–250/product
Revenue / yr: $106K–$141K; units × avg price
Conversion rate: 8.5%
Avg BSR: #995
Page quality: 0%
Prime: 100%
Sponsored: 72%
Out of stock: 3.5%
Avg brand age: 56 months
Avg seller age: 134 days

Competition & brand share

The top 5 products take 51% of clicks — established leaders, but buyers still shop beyond them.

Brands

13 falling

Sellers

637

Top-5 brand share

78%

Top 20: 100%

Top-5 click share

51%

Top 20: 94%

Open market

15%

First Botany39%
Shea Moisture13%
INFINA ESSENTIALS11%
Difeel8%
BELLISSO7%
GIOVANNI7%
Open — no brand owns it (7 brands, 15%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -4.7% search growth over the last 90 days.

Peak months: Sep · busiest ÷ quietest = 2.8×

Open Trend

Top castor oil shampoo search terms

castor oil shampoo59K/yr +1.9%6.3% conv.
first botany shampoo5K/yr -17.8%9.9% conv.
castor oil shampoo for hair growth8K/yr -26.0%5.9% conv.
first botany5K/yr +4.3%3.7% conv.
castor shampoo5K/yr -11.9%5.2% conv.
shampoo castor oil4K/yr -19.8%6.2% conv.
first botany shampoo and conditioner4K/yr -29.5%10.2% conv.

All search terms

Top castor oil shampoo 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 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Castor Oil Shampoo - An Anti Hair Loss Shampoo Thickening formula For Hair Regrowth Anti Thinning Sulfate Free For Men & Women Anti Dandruff Treatment 16 fl oz

First Botany$15.504.2★287 rev

Castor Oil Shampoo and Conditioner Set for Hair Growth with Rosemary & Peppermint Oil - Cleanse Hair Strengthen & Shine with Castor Shampoo and Conditioner - Anti-Hair Loss for Men & Women - 16 fl oz

INFINA ESSENTIALS$28.934.5★1,089 rev

Castor Oil Shampoo and Conditioner Set - Thickening Products for Thinning Hair Women and Men - Sulfate Free Formula - Hydrating Volumizing and Moisturizing for Dry Hair - Volume Boosting Color Safe

BELLISSO$23.904.3★46,563 rev

GIOVANNI Smoothing Castor Oil Shampoo - All Hair Types Moisturize Hair & Scalp Hydrate & Tame Frizz Jojoba Argan Oil Coconut Oil Shea Butter Keratin - 13.5 oz

GIOVANNI$13.544.5★2,434 rev

SheaMoisture Strengthen and Restore Shampoo Pure Jamaican Black Castor Oil for Damaged Hair To Cleanse and Nourish Hair 13 fl oz

Shea Moisture$8.074.6★19,822 rev

Newest

by launch date

HerStyler Castor Oil Shampoo with Rosemary - Cooling Mint Scalp Detox

HerStyler$14.5328 rev

3mo ago

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$12.551,955 rev

9mo ago

Castor Oil Shampoo and Conditioner Set - Thickening Products for Thinning Hair Women and Men - Sulfate Free Formula - Hydrating Volumizing and Moisturizing for Dry Hair - Volume Boosting Color Safe

BELLISSO$23.9046,563 rev

1y ago

Renpure Moringa & Castor Shampoo Plant-Based - Curl Enhancing - For Moisturized Manageable & Smooth Curls - With Castor & Moringa Seed Oil - For Wavy To Curly Hair - 24 Fl Oz

RENPURE$6.904,990 rev

1y ago

Castor Oil Shampoo - An Anti Hair Loss Shampoo Thickening formula For Hair Regrowth Anti Thinning Sulfate Free For Men & Women Anti Dandruff Treatment 16 fl oz

First Botany$15.50287 rev

1y ago

What buyers say about castor oil shampoo

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

What buyers love

Smell23%

“Nicely scented”

Quality-Overall12%

“Decent quality”

Hair Growth10%

“Helps your hair grow”

Soft Feel9%

“And my hair feels soft”

Cleansing6%

“It cleans well”

Moist/Dry4%

“Súper hydrating”

Value For Money3%

“Worth the price”

Lather3%

“It lathers up easy”

Suitability Straight Hair3%

“Works very well on my hair”

Advertised Vs Actual Product2%

“does what it says it does”

What buyers complain about

Smell15%

“The smell is disgusting”

Hair Related8%

“I can barely get a comb or brush through my hair”

Moist/Dry7%

“Not hydrating enough”

Allergies7%

“Had severe allergic reaction”

Functionality-Overall4%

“This time to pump doesn't work”

Oily/Greasy4%

“Makes hair extremely oily”

Damage/Burn Hair3%

“Makes your hair fall out”

Ease Of Use3%

“Hard to open”

Thickness3%

“It is not thick like a creamy lotion”

Ease Of Cleaning3%

“it won't be able to clean your hair”

Top return reasons

Smell17%

Leak-Proof15%

Suitability Short Hair7%

Advertised Vs Actual Product7%

Moist/Dry6%

Motor Power5%

Size-Overall5%

Damage/Burn Hair5%

Oily/Greasy4%

Functionality-Overall4%

Common questions

Is castor oil shampoo profitable to sell on Amazon United States?: The niche generates $134K/yr across 25 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is -4.7%. Flapen's verdict: Worth a look (53/100).
How competitive is the castor oil shampoo niche?: 13 brands and 637 sellers compete. The top 5 products take 51% of clicks and top 5 brands hold 78% of demand.
What do buyers complain about in castor oil shampoo?: Top complaints mined from reviews: Smell, Hair Related, Moist/Dry. The return rate is 0.8%.
When does demand for castor oil shampoo peak?: Demand peaks in Sep; the busiest month runs 2.8× the quietest.
What does it cost to enter the castor oil shampoo niche?: Listings span $6.90–$28.93; the average listing price is $17.59 (sweet spot $15–$100). The average incumbent carries 7,938 reviews — the moat a new listing must climb.

castor oil shampoo

castor oil shampoo market data

Competition & brand share

Demand & seasonality

Top castor oil shampoo search terms

Top castor oil shampoo products on Amazon

Top sellers

Newest

Trending

What buyers say about castor oil shampoo

What buyers love

What buyers complain about

Top return reasons

Common questions

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