Does Castor Oil Grow Hair? Here’s Everything You Need To Know

Medically reviewedby Dr. Amy Revene M.B.B.S.
WrittenbyLuat Duong
Last updated

Does castor oil really grow hair? This age-old remedy has been touted for its miraculous benefits, but how effective is it truly? 

In this article, we'll explore the science behind castor oil, its potential benefits for growth, and how you can use it effectively to enhance your hair's thickness and health possibly. 

What is castor oil?

does castor oil grow hair

Castor oil, a type of vegetable oil, is derived from the seeds of the castor plant, commonly found in regions like Africa, India, and South America. This vegetable oil is especially rich in ricinoleic acid, a potent antioxidant that helps protect the scalp and hair health from damage caused by free radicals.

Besides antioxidants, castor oil, derived from castor beans, is loaded with fatty acids, proteins, and other nutrients, making it an essential oil for hydrating and soothing the skin, scalp, and hair.

Castor oil's unique composition makes it a natural emollient, providing hydration and conditioning to the hair. Its rich content of fatty acids and ricinoleic acid helps to soothe the scalp and enhance hair health, offering benefits beyond mere aesthetics.

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Does castor oil grow hair?

While castor oil is undoubtedly nourishing for the hair and s2calp, there's no concrete clinical evidence to confirm it can promote hair growth. Despite this, many users report improvements in hair strength and health. 

According to experts, castor oil's ricinoleic acid content may enhance scalp circulation, theoretically supporting healthier and stronger hair. However, these effects have yet to be conclusively proven in studies.

Further adding to this perspective, dermatologists note that although definitive scientific support is lacking, the nourishing properties of castor oil could create a favorable environment for hair growth

Its role as a humectant helps hydrate follicles, which might reduce breakage and contribute to overall hair health.

What are the benefits of using castor oil?

does castor oil grow hair

While castor oil may not cure hair growth, it offers several benefits that make it a valuable addition to your hair care routine.

  • Natural emollient: Castor oil helps moisturize and lock in natural oils, leaving hair stronger and healthier.
  • Anti-inflammatory properties: It can soothe an irritated, flaking scalp, creating a healthier environment for thinning hair treatments and overall hair regrowth.
  • Antifungal and antimicrobial: These properties help reduce scalp dryness and itching, enhancing overall scalp health.
  • Enhances hair luster: Regularly massaging the oil into your scalp, particularly when mixed with coconut oil, may enhance the volume of your hair and support hair regrowth.
  • Promotes overall scalp health: By improving blood flow to the scalp, castor oil helps grow hair follicles, potentially improving hair quality and texture over time.

While castor oil may not be a cure-all for hair growth, it offers several benefits that make it a valuable addition to your hair care routine.

How to use castor oil for hair growth

Here’s a simple step-by-step guide on how to effectively use castor oil to enhance hair growth and maintain healthy hair:

  • Prepare the oil mixture: Start by mixing castor oil with a lighter oil like coconut or jojoba oil. This dilution makes it easier to apply and helps mitigate the strong scent of castor oil. A recommended mixing ratio is one part castor oil to two parts of your chosen carrier oil
  • Apply to the scalp: Use your fingertips to apply just a few drops of the oil mixture directly to your scalp. Gently massage the oil into your scalp to help stimulate blood circulation to the hair follicles, which is crucial for promoting hair growth.
  • Distribute through hair: After massaging your scalp, apply a small amount of the oil mixture to the midsection and ends of your hair. This helps prevent breakage and improves the overall texture of your hair.
  • Let it sit: Leave the oil in your hair for about two hours. This duration allows ample time for the oil to penetrate deeply and nourish both your hair and scalp without causing dryness.
  • Wash out: Thoroughly wash your hair with shampoo to remove the oil. Depending on the viscosity of the oil mixture and your hair type, you might need to shampoo twice to ensure all oil is removed.

Best castor oil for hair growth

Here are some of the best castor oils for hair growth:

  1. Rey Naturals Castor Oil 
  2. Pura D'or Organic Castor Oil
  3. Viva Naturals Organic Castor Oil
  4. Difeel Premium Jamaican Black Castor Hair Oil
  5. Tropic Isle Living Jamaican Black Castor Oil

1. Rey Naturals Castor Oil 

Rey Naturals Castor Oil

Rey Naturals Castor Oil is a powerful ally in the fight against hair loss, boasting properties that nourish and fortify the hair and scalp. 

This oil is particularly effective in hydrating and moisturizing the scalp, alleviating dryness and itchiness which are common obstacles to hair growth. 

The nutrients within the oil penetrate deeply into the hair shaft, promoting a thick, voluminous appearance and strengthening hair strands from root to tip. 

Regular use of this oil could be the key to achieving not only fuller hair but also a healthier scalp.

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2. PURA D'OR Organic Castor Oil

PURA D'OR Organic Castor Oil

This oil offers a versatile, all-natural solution for enhancing beauty naturally. It's particularly effective for stimulating and thickening eyelashes and eyebrows, providing them with a lush, dense appearance. 

Moreover, this castor oil shines when applied to dry hair, adding a healthy gloss and much-needed moisture. 

Whether it's for boosting the beauty of your brows and lashes or revitalizing dry, lifeless locks, PURA D'OR Castor Oil is a standout choice for natural beauty enthusiasts.

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3. Viva Naturals Organic Castor Oil

Viva Naturals Organic Castor Oil

Viva Naturals Organic Castor Oil is an essential multipurpose oil that supports hair, skin, and eyelash health with equal efficacy. Its high-quality formulation is perfect for those looking to add thickness to their hair or give a boost to sparse lashes and brows. 

Beyond hair care, it's also an excellent base for DIY skincare recipes, making it a versatile addition to any beauty routine. 

With its all-natural, pure composition, Viva Naturals Castor Oil is quickly becoming a favorite for those seeking organic solutions for their beauty needs.

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4. Difeel Premium Jamaican Black Castor Hair Oil

Difeel Premium Jamaican Black Castor Hair Oil

This oil by Difeel is designed specifically to enhance the health of your hair. As a potent leave-in conditioner, it excels in promoting natural, healthy hair growth. 

It hydrates and repairs damaged hair, leaving it softer, smoother, and more luminous. Its ability to moisturize, thicken, and strengthen hair stands out, making it an excellent choice for those looking to boost their hair growth and improve hair texture with a product that gets deep into the hair follicles.

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5. Tropic Isle Living Jamaican Black Castor Oil

Tropic Isle Living Jamaican Black Castor Oil

This black castor oil stands out with its rich heritage and pure formulation. Derived from the best hand-picked beans in the lush regions of Jamaica, this oil offers more than just hair care—it detoxifies the skin and promotes blood flow, which is essential for collagen production. 

Its ability to cleanse the scalp from build-up, while locking in moisture, makes it ideal for nourishing all hair types. 

Known for its smooth texture and earthy scent, Tropic Isle's Jamaican Black Castor Oil is a must-have for those seeking to thicken their hair and maintain a healthy scalp.

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What are the side effects of using castor oil?

Although castor oil is widely used for its benefits, it's important to be aware of potential side effects, particularly with improper use:

  • Hair felting
  • Ingestion risks
  • Abdominal cramps
  • Diarrhea
  • Dizziness
  • Fainting
  • Hallucinations
  • Nausea
  • Shortness of breath and chest pain
  • Skin rash
  • Throat tightness

How often should you apply castor oil?

It's recommended apply castor oil on your hair no more than once a week. Using it more frequently can lead to buildup and potential issues like matting. While there’s no strict rule on how long to keep castor oil in your hair, leaving it on for too long may dry out both your hair and scalp. Ideally, you should wash it out after about two hours to avoid any adverse effects.

Applying castor oil just once a week strikes a balance between reaping its benefits and avoiding the downsides of overuse. This weekly treatment can be a soothing ritual that keeps your hair looking healthy without the risk of buildup.

Can you leave castor oil in your hair overnight?

Whether you can leave castor oil in your hair overnight depends largely on your hair type. For those with fine and medium hair, it's best to apply castor oil to the mid-lengths and ends of your hair, leaving it on for up to 30 minutes before shampooing. This ensures that your hair gets nourished without being weighed down or getting excessively oily.

On the other hand, if you have coarse, thick, or ultra-dry hair, you might benefit from leaving castor oil in as an overnight treatment. This longer exposure can deeply condition your hair, providing much-needed hydration and strengthening. 

Additionally, those with very dry ends may consider using a small amount of castor oil as a leave-in conditioner to help smooth and protect their hair throughout the day.

How long does castor oil take to work?

For those using castor oil to promote hair growth, patience is key. Optimal results typically require consistent use for at least three to six months. This time frame allows the oil to adequately reach the follicles, potentially leading to thicker, healthier hair.

During this period, the rich nutrients in castor oil, like ricinoleic acid, work gradually to improve the overall health of your hair and scalp. 

While immediate results may not be visible, continued use over months can yield significant improvements in hair texture, strength, and possibly growth.

A better approach for your overall hair health

hair growth serum

In the quest for fuller, healthier hair, Bio-Pilixin Activation Serum offers a promising alternative. 

Developed using advanced stem cell technology, this serum is a board-certified dermatologist-recommended solution designed to nurture hair follicles and stimulate blood flow, crucial for delivering nutrients to the scalp and improving hair and scalp health. 

The serum's plant growth factors actively work to reduce hair thinning and support new hair growth.

Here’s a glimpse into the impressive results from clinical studies:

  • 77% of participants reported reduced hair loss after just 45 days.
  • 93% experienced a clinically significant reduction in hair loss after 150 days.
  • 73% observed a measurable increase in hair density over the same period.

These outcomes highlight the serum’s effectiveness. Many users note a decrease in hair shedding during routine activities like showering, often within just a few weeks of starting the treatment.

Our confidence in Bio-Pilixin is reflected in our commitment to customer satisfaction. We offer a 150-day money-back guarantee, allowing you to experience the benefits risk-free. 

This guarantee ensures that you can feel secure in your purchase and hopeful about the potential for improved hair health.

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While castor oil is celebrated for its nourishing properties and potential to improve hair health, it's important to have realistic expectations about its effects on hair growth. 

Consistent use over several months may help enhance your hair's overall condition, but for those seeking more significant results in combating hair thinness and loss, products like Bio-Pilixin Activation Serum could offer a more scientifically supported solution. 

With its clinically tested formula and promising results, it provides a viable option for those looking to invest in their hair's health and vitality.

Remember, whether you choose natural oils or advanced treatments, the key to success is consistency and patience.


Does castor oil help in hair growth?

Yes, castor oil is widely recognized for its traditional benefits in promoting hair growth. Researchers have noted that regular use of castor oil can reduce hair fall and enhance the luster of your hair. For even better results, it's often recommended to use castor oil in combination with coconut oil to potentially increase hair volume.

How long does it take for castor oil to grow hair?

Patience is essential when using castor oil for hair growth. According to experts like Hill, it can take up to 90 days to see a noticeable change in hair health and length. For those committed to improving their hair's health, incorporating castor oil into your weekly hair care regimen and continuing for at least three months is crucial for achieving long-term benefits.

What oil is best for hair growth?

Several oils stand out for their hair growth properties. Argan oil is excellent for growth and shine, while coconut oil is lauded for its ability to penetrate the hair shaft, reducing protein loss and boosting moisture. Rosemary oil is often chosen for its ability to stimulate cellular generation, potentially enhancing hair thickness and growth. 


Luat Duong

Luat Duong is a Copenhagen-based writer and content strategist specializing in hair loss and health. His work has been featured in MyHealthGuide, The Right Hairstyles, and Woman's Era. He is a graduate of Vaasa University. You can connect with him on LinkedIn.