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

The niche generates $91K/yr across 10 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is -26.2%. Flapen's verdict: Skip it (42/100).

How competitive is the castor oil capsules niche?

9 brands and 23 sellers compete. The top 5 products take 81% of clicks and top 5 brands hold 87% of demand.

What do buyers complain about in castor oil capsules?

Top complaints mined from reviews: Functionality-Overall, Taste-Overall, Size-Overall. The return rate is 0.1%.

When does demand for castor oil capsules peak?

Demand peaks in Jul; the busiest month runs 2.1× the quietest.

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

Listings span $7.68–$21.59; the average listing price is $13.85 (sweet spot $15–$100). The average incumbent carries 765 reviews — the moat a new listing must climb.

castor oil capsules

Skip it

Soft demand (-26.2% this quarter) — this niche doesn't clear our bar today.

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Conversion

Great8.8%

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

Review moat

Good765.2

avg incumbent reviews — the moat a new listing must climb

Avg price

Good$13.85

avg listing price — sweet spot $15–$100

Price range

Okay$7.68–$21.59

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

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Brand share

Okay87%

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

Market size

Bad$91K

$91K/yr · 75K searches

Competition

Bad81%

top-5 click share — a locked-up shelf

Growth

Bad-26.2%

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

According to Flapen's Amazon United States niche tracking, castor oil capsules is a $91K/yr Amazon United States market (75K searches/yr). The top 5 brands hold 87% of demand. Demand peaks in Jul. Verdict: Skip it — 42/100.

Data updated Jul 11, 2026 · scored weekly · How we score niches

castor oil capsules market data

Units sold / yr: 8K–10K; avg 750–1,000/product
Revenue / yr: $111K–$139K; units × avg price
Conversion rate: 8.8%
Avg BSR: #576
Page quality: 0%
Prime: 100%
Sponsored: 50%
Out of stock: 0.0%
Avg brand age: 47 months
Avg seller age: 171 days

Competition & brand share

The top 5 products capture 81% of clicks — a locked-up shelf that new listings rarely crack.

Brands

9 rising

Sellers

Top-5 brand share

87%

Top 20: 100%

Top-5 click share

81%

Top 20: 100%

Open market

Dr. HERBALIST29%
Vitamatic20%
NOW Foods20%
Carlyle10%
HERITAGE STORE9%
Piping Rock5%
Open — no brand owns it (3 brands, 8%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -26.2% search growth over the last 90 days.

Peak months: Jul · busiest ÷ quietest = 2.1×

Open Trend

Top castor oil capsules search terms

castor oil capsules25K/yr -27.6%11.3% conv.
castor oil pills20K/yr -18.2%9.8% conv.
castor oil capsules organic cold pressed10K/yr -42.2%10.5% conv.
castor oil pills organic soft gels4K/yr +0.6%12.4% conv.
castor oil supplements6K/yr -0.1%8.3% conv.
castor oil tablets2K/yr -27.7%15.0% conv.
castor oil pills organic5K/yr -71.9%9.6% conv.
castor oil pills 725 mg for parasites2K/yr +6.7%13.3% conv.

All search terms

Top castor oil capsules 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 10 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Dr. HERBALIST Castor Oil Capsules 1600mg - Cold-Pressed Ricinus Communis Seed Oil No Fennel - 60 Easy-Swallow Vegetarian Softgels (30 Servings) - Castor Oil Pills for Hair & Skin - Halal

Dr. HERBALIST$10.524.3★603 rev

Vitamatic Castor Oil Softgels 750 mg | Cold Pressed | 180 Softgels | Easy-to-Swallow

Vitamatic$12.894.6★92 rev

NOW Foods Supplements Castor Oil 650 mg with Fennel Oil Natural Laxative* 120 Softgels

NOW Foods$9.604.4★3,049 rev

Carlyle Castor Oil 750mg | 200 Softgels | Traditional Herb | Non-GMO Gluten Free Supplement

Carlyle$15.074.6★1,061 rev

HERITAGE STORE Castor Oil Supplement 725 mg Healthy Cleansing Intestinal Balance & Digestion Support * with Added Fennel Oil 60 Servings 60 Vegetarian Capsules

HERITAGE STORE$14.574.6★880 rev

Newest

by launch date

Vitamatic Castor Oil Softgels 750 mg | Cold Pressed | 180 Softgels | Easy-to-Swallow

Vitamatic$12.8992 rev

6mo ago

BulkSupplements.com Castor Oil Softgels - 1 Softgel per Serving 240 Count (Pack of 1)

BulkSupplements$21.5913 rev

9mo ago

A+Health Castor Oil Laxative For Constipation 100% Pure 6 Fluid Ounces Tasteless Odorless Hexane Free Moisturizing and Nourishing for Skin and Hair Made in USA

A+Health$7.68248 rev

10mo ago

FITO MEDICS Lab | Castor Oil Pills |220 softgels | Castor Oil softgels | Concentrate Extract

FITO MEDIC'S$14.05234 rev

2y ago

Dr. HERBALIST Castor Oil Capsules 1600mg - Cold Pressed Ricinus Communis Softgels | Supports Digestive Wellness & Hair Skin Vitality* | Halal Non-GMO Vegan | 60ct

Dr. HERBALIST$17.40603 rev

2y ago

What buyers say about castor oil capsules

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

What buyers love

Quality-Overall17%

“Even so, the quality feels solid, and the packaging is straightforward and convenient”

Ease Of Chewing/Swallowing9%

“I have had no issues swallowing them”

Advertised Vs Actual Product7%

“Worked as advertised”

Efficiency6%

“Seem to work good”

Value For Money6%

“Good value”

Ease Of Use5%

“this is such a convenient option”

Dosage4%

“the proper dosage for my health needs”

Regulates Digestion4%

“I mainly wanted something to support overall digestive balance and general wellness, and so far theyve been easy to work into a regular routine without any issues”

Nutritional Content3%

“This is an excellent supplement brand that I trust for their proper testing and consistent results”

Smell2%

“There's no foul smell which is great”

What buyers complain about

Functionality-Overall9%

“Didn't work”

Taste-Overall8%

“It doesn't taste like anything”

Size-Overall7%

“These are big”

Smell5%

“The bottle full of softgels has a slight oily smell”

Dosage4%

“I took two pills and nothing happened”

Side Effects3%

“This gave me terrible stomach cramps”

Oily/Greasy3%

“Oil”

Ingredients-Overall3%

“too much fennel not enough castor”

Thickness2%

“which can be incredibly thick”

Material Quality2%

“Its in plastic dont get it because it degrades the product”

Top return reasons

Value For Money20%

Material Quality20%

Advertised Vs Actual Product15%

Oily/Greasy10%

Functionality-Overall10%

Defective Material/Parts10%

Texture/Consistency-Overall5%

Dilute/Watery5%