natural castor oil shampoo bar with packaging on a light background

Woman with wet hair holding a castor oil shampoo bar of soap in front of her face.

Person washing hair with a castor oil shampoo bar in a bathroom setting

Woman in a bathtub holding a casotr oil shampoo bar

Castor Oil Shampoo Bar

Name: Castor Oil Shampoo Bar
Brand: Seek Bamboo
SKU: Castor-Oil-Shampoo-1
Price: 12.75 USD
Availability: InStock

5.0

Rated 5.0 out of 5 stars

39 Reviews

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Castor Strength

Supports thicker-looking, stronger hair from root to tip. Castor oil helps reduce breakage and reinforce strands over time.

Scalp Balance

Helps hydrate and balance the scalp. Castor oil, jojoba, and betaine support a comfortable, healthy foundation for strong hair.

Botanical Support

A strengthening botanical blend that nourishes scalp & strands for healthier-looking hair, improving density.

Hydrolyzed Rice Protein

Penetrates the hair shaft to improve moisture retention, strength, and elasticity for more resilient hair.

What It Is

A strength-boosting cleanse for thicker-looking, healthier hair. Our solid Castor Oil Shampoo Bar delivers a rich, nourishing lather that supports scalp health and fortifies strands—without plastic bottles or harsh chemicals.

Powered by cold-pressed castor oil and plant-based ingredients, this bar helps moisturize the scalp, reduce breakage, and improve the look of hair density over time. No sulfates. No parabens. Just deeply conditioning, plant-powered care from root to tip.

One bar replaces up to 3 plastic shampoo bottles. Stronger strands for you—less waste for the planet.

✦ Trusted By Experts

WHY YOU'LL LOVE IT

✓ enriched with castor oil to nourish the scalp & support thicker-looking hair

✓ helps reduce breakage while improving strength & elasticity

✓ deeply moisturizing without weighing hair down

✓ sulfate, paraben- & plastic-free for a truly clean routine

✓ each big bar lasts up to 75–90 washes (yep, really) — 3.2 oz

✓ soft, naturally clean scent with no artificial fragrance

✓ travel-ready, TSA-friendly, & mess-free

✓ vegan, cruelty-free, & handmade with care

✓ ships 100% plastic-free, like everything we do

Castor Oil Shampoo Bar

$12.75

$17.00

Featured Ingredients

pH balanced & safe for color-treated hair

5.0

Rated 5.0 out of 5 stars

Based on 39 reviews

100%would recommend this product

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39 reviews

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C
Carrie
Verified Reviewer
I recommend this product
Rated 5 out of 5 stars
2 hours ago
Clean Hair, Clear Conscience
I love knowing my shampoo routine is plastic-free and plant-based. Even better—my hair feels stronger, looks fuller, and stays soft between washes.
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P
Paula
Verified Reviewer
I recommend this product
Rated 5 out of 5 stars
2 hours ago
Long-Lasting and Worth It
This bar lasts a long time and delivers consistent results. My hair feels fortified, smooth, and well cared for from root to tip.
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A
Andrew
Verified Reviewer
I recommend this product
Rated 5 out of 5 stars
Yesterday
Nourishing Without Build-Up
I love how nourishing this shampoo bar is without leaving any residue. My hair feels clean, smooth, and naturally shiny.
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C
Caroline
I recommend this product
Rated 5 out of 5 stars
6 days ago
Stronger Hair After Every Was
Each time I use this shampoo bar, my hair feels stronger and healthier. It cleans thoroughly but still leaves my scalp feeling moisturized and comfortable.
Was this helpful?
M
Melody
I recommend this product
Rated 5 out of 5 stars
6 days ago
My Go-To Shampoo Bar
This has become my everyday shampoo. My hair feels fortified, my scalp feels calm, and I love knowing I’m using something that’s better for the planet.
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A
Athena
I recommend this product
Rated 5 out of 5 stars
6 days ago
Plastic-Free and Powerful
I love that one bar replaces multiple plastic bottles, but what really sold me is how good it makes my hair feel. Stronger, healthier, and easier to manage.
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R
Rey
I recommend this product
Rated 5 out of 5 stars
6 days ago
Perfect Balance of Strength and Moisture
This bar gives my hair the perfect balance—stronger strands without feeling heavy or oily. It rinses clean and leaves my hair soft and manageable.
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The Seek Bamboo Pledge: Not totally in love with your Seek Bamboo shampoo bar? Send it back our way – anytime, no questions asked! We stand behind our bars with a 100% satisfaction guarantee.

Let’s Talk Castor Oil Shampoo

Your most-asked questions about stronger strands, scalp care, and how to use it — answered.

What does castor oil shampoo do for hair?

Castor oil shampoo helps nourish the scalp and strengthen hair strands, supporting healthier-looking, thicker-feeling hair over time. Its conditioning properties help reduce breakage while maintaining moisture balance from root to tip.

Is castor oil shampoo good for hair growth?

Castor oil shampoo supports a healthy scalp environment, which is essential for optimal hair growth. While it doesn’t create new hair follicles, it helps minimize breakage and improve strand strength so hair can grow longer and fuller-looking.

Does castor oil shampoo help with thinning hair?

Castor oil shampoo can benefit thinning hair by helping reinforce weak strands and reduce breakage. With consistent use, hair may appear denser and more resilient due to improved moisture retention and scalp support.

Is castor oil shampoo good for your scalp?

Yes, castor oil shampoo helps hydrate and support scalp comfort while maintaining balance. When formulated with gentle, sulfate-free cleansers, it cleans effectively without stripping natural oils.

Can castor oil shampoo cause buildup or greasy hair?

A properly formulated castor oil shampoo will not cause buildup or greasy residue. Balanced with lightweight plant-based ingredients, it rinses clean while delivering nourishment without weighing hair down.

What hair types benefit most from castor oil shampoo?

Castor oil shampoo works well for most hair types, especially thinning, dry, curly, or breakage-prone hair. It’s ideal for those seeking strength, moisture, and scalp support in one routine.

How often should you use castor oil shampoo?

Castor oil shampoo can typically be used 2–4 times per week, depending on hair type and lifestyle. Its gentle, sulfate-free formula allows for regular cleansing without over-drying.

Is castor oil shampoo safe for color-treated hair?

Yes, sulfate-free castor oil shampoo is safe for color-treated hair and helps maintain moisture and shine. It cleans gently without stripping or fading hair color.

Castor oil shampoo vs regular shampoo — what’s the difference?

Castor oil shampoo focuses on scalp nourishment and strand strength using plant-based ingredients, while many regular shampoos rely on harsh detergents that can strip moisture and weaken hair over time.

Does castor oil shampoo clog pores or irritate the scalp?

No, castor oil shampoo formulated for hair care is non-comedogenic and gentle on the scalp. When paired with amino-acid cleansers and botanical oils, it supports scalp comfort without irritation.

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