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How to Use Castor Oil for Curly Hair Growth & Thicker Curls

Published: Apr 11, 2022 · Modified: Apr 13, 2023 by Kenneth Byrd · This post may contain affiliate links

Cute African American female with natural curls styled with tea tree oil, pure castor oil, and fresh ginger juice.

Castor oil is a type of vegetable oil that comes from the castor plant, specifically the seeds of the castor plant.

The oil is usually either very pale yellow or colorless. It does not have any taste or odor. Despite this fact, it is possible to have castor oil that is darker in color, but this is due to the extraction method.

Although the castor plant was originally found in India and East Africa, it is now grown all around the world in various tropical zones.

Castor oil has been used for a variety of purposes throughout history because of its components which include three fatty acids: oleic, linoleic, and ricinoleic acids. The last of these is a common ingredient in hair moisturizers.

Table of Contents

  • 1 The Extraction Method
  • 2 History of the Castor Plant: The Name "Palma Christe"
  • 3 Is Castor Oil Good for Natural Hair Growth?
  • 4 How to Use Jamaican Black Castor Oil
  • 5 Pre-Poo Castor Oil Recipe: Overnight Treatment
    • 5.1 Instructions:
    • 5.2 Benefits of this recipe
  • 6 Hot Oil and Wash Recipe
    • 6.1 Instructions
    • 6.2 Benefits of This Recipe
  • 7 Long Hair Hot Castor Oil Recipe
    • 7.1 Instructions:
    • 7.2 Benefits of This Recipe
    • 7.3 Related Articles
    • 7.4 Does Castor Oil Make Straight Hair Curly?
    • 7.5 Does Castor Oil Work on Low Porosity Hair?
    • 7.6 Is Castor Oil Good for High Porosity Hair?
    • 7.7 Is Jamaican Black Castor Oil Good for Hair?
  • 8 Where to Buy Castor Oil for Hair?

The Extraction Method

Dried and fresh castor oil plant seeds that can be used to make cold-pressed castor oil.
Dried and fresh castor oil plant seeds

As mentioned, castor oil is produced from the seeds of the castor plant. To extract the oil, a cold-pressing technique is most commonly used.

First, the person will remove the outer hull of ripe seeds as this part contains ricin which can cause side effects due to its toxicity.

After removing the hull, the seeds are cooked to make them more pliable. They are then dried and put into a cold press which is a device that applies a high amount of pressure to extract the oil.

Finally, the oil is filtered, removing impurities and making it slightly yellow in color.

History of the Castor Plant: The Name "Palma Christe"

A woman with bouncy curls created by applying castor oil after washing her hair with a sulfate-free shampoo.

Early in the history of castor oil, the plant it comes from was known as "Palma Christe" due to the thought that it could heal wounds and cure ailments.

Later on, the oil was used for medicinal purposes in Rome, Greece, Africa, Persia, China, and Ancient Egypt. It spread to America and Europe during the 17th century and now can be found worldwide.

Is Castor Oil Good for Natural Hair Growth?

Although there are several benefits to using castor oil, many of them can directly improve the hair. One of the most reported benefits is that castor oil can decrease hair loss because of the ricinoleic acid found within it.

Many claims that ricinoleic acid will not only protect the hair but also increase hair growth through circulation on the scalp. The prevailing thought is that by increasing circulation, the oil can help improve hair growth in addition to fighting hair loss.

Despite claims of increased hair growth or thickness, there are no scientific studies proving castor oil can help increase hair growth or the thickness of the hair.

Young black woman smiling with braces and naturally curly hair.

Castor oil is not a featured ingredient in hair loss shampoos or other products designed to treat male or female pattern baldness. Also, the other fatty acids in the oil, which are similar to those in coconut oil and olive oil, are not associated with hair growth.

Candidly, I haven't been able to substantiate the claim that castor oil promotes hair growth. Many women massage their scalp with the oil and notice improved hair thickness. 

Massaging the scalp, even with water, can stimulate the hair follicles according to scientific studies conducted on lab rats. So, it's possible that castor oil is being credited inaccurately.

How to Use Jamaican Black Castor Oil

Portrait of a young black woman smiling with braces wearing tank top.

The best way to use the oil to benefit your hair is by applying it directly to the scalp and hair. In the video below, Yolanda Renee, a popular Youtube vlogger, discusses the techniques that she uses with Tropic Isle Living JBCO.

NATURAL HAIR | JAMAICAN BLACK CASTOR OIL for Hair Growth

Some people believe that Jamaican Black Castor Oil is naturally black in color. This is actually inaccurate. The fact is that the dark color is the result of ash being added to the oil from roasted beans, as explained by Sunny Isle JBCO.

The organic seeds are roasted, then ground manually by a grinder. The resulting ground beans are then boiled further to produce pure organic oil that appears to be dark brown in color.

Sunny Isle states their Jamaican Black Castor Oil is darker than most because they roast their beans for longer than the competition, producing the ash content characteristic of the Sunny Isle brand.

This explains the presence of ash in the oil, which doesn't really mean that the product itself is inferior to other oils on the market.

It just shows how the company produces its black castor oil as compared to other manufacturers. The ash itself has yet to be found beneficial, but it answers the question in everyone's mind, "Why is JBCO black?".

Pre-Poo Castor Oil Recipe: Overnight Treatment

For this recipe, you'll need the following products:

  • 3 tbsp. castor oil
  • 1 tbsp. avocado oil
  • 1 tbsp. jojoba oil
  • Hot water
  • 3 drops of peppermint essential oil

You'll also need the following supplies:

  • Jar
  • A bowl (large enough to submerge your bottle)
  • Shower cap
  • Towel
  • Old Shirt

Instructions:

Step 1: To ensure that your oil is easy to use, thoroughly mix your oils in a jar. Castor oil is a very thick oil, and it retains heat well, but getting it out of your hair will be easier if you can make it lighter. So keep an eye on your oil's thickness and add more of the thinner oils if you need to. The consistency you're going for is slightly watered down honey.

Step 2: Add in your essential oil. Some people don't find the smell of castor oil to be very palatable. If that's you, feel free to add more peppermint oil since it has a pleasant scent. 

Step 3: Get your water boiling, either from a pot on the stove or by boiling water in a kettle. As your water boils, place a lid on your jar and shake thoroughly. 

Step 4: Once your water is done boiling and the oils are mixed, place your jar in a bowl. Keep the lid on tight and pour hot water into the bowl with the jar to heat the contents. Next, wait for 2 minutes.

Step 5: While your jar is heating up, lightly dampen your hair and divide it into sections. Cover your shoulders with a clean towel to protect your hair.

Step 6: By now, your oil should be nice and warm. Remove the jar from the bowl and apply it to your scalp. There are several ways to apply hot oil to your scalp:

  • Dip your fingers into the jar and apply it to your hair and scalp.
  • Pour the hot oil into a wider cup, dip your fingers into the cup, and apply it to your scalp.
  • Pour the hot oil into an applicator bottle and apply it to your scalp, and massage. Once you've finished massaging your scalp, squeeze some oil into your hands so you can apply it to the ends of your hair. 

It's not necessary to coat your head completely in oil. Apply only as much as you need. The only thing you need to do is apply the oil from the roots to the end of your hair strands. Then massage your scalp.

Step 7: Once your hair is properly saturated, cover your head with a shower cap and wrap a towel around your head. You can wear your wrap for a minimum of 30 minutes but can also wear it overnight. Once you're done, shampoo and conditioner your hair as you normally do.

Benefits of this recipe

What we like about this recipe is the use of avocado oil, jojoba oil, and castor oil together. A mix like this gives you a moisturizing boost and combats dry hair. As for the essential oil, it adds that extra soothing effect to your natural moisturizer.

Hot Oil and Wash Recipe

For this recipe, you'll need the following products:

  • 3 tbsp. of castor oil
  • 3 tbsp. of coconut oil

You'll also need the following supplies:

  • Microwave safe bowl
  • Towel
  • Comb
  • Supplies to section your hair (clips and hair ties)

Instructions

Step 1: Wash your hair as you normally would. Once you're done, wrap a towel around your head.

Step 2: Mix castor oil and coconut oil in a microwave-safe bowl and heat it for 10 seconds. As you wait for your oil to cool, place a towel over your shoulders and divide your hair into 4 sections. Then check your oil once more to make sure that it's not too hot.

Step 3: If you can handle the heat, apply the oil to your hair and comb it thoroughly in each section. Once it's combed through, apply the oil evenly and massage your scalp. 

Step 4: Cover your head with a shower cap and wait for 30 minutes. 

Step 5: Now, you can continue your wash day by rinsing out the water and using your conditioner as normal.

Benefits of This Recipe

This method is unconventional since you'll have to step out of a warm shower to get a hot oil treatment and then hop back in the shower.

Fortunately, the benefits will make it worth it when considering how heat and water affect your oil treatment. If you can finish conditioning your hair with cold water to close your cuticles, your hair will thank you.

Long Hair Hot Castor Oil Recipe

For this recipe, you'll need the following products:

  • 3 tbsp. of castor oil
  • 1 tbsp. of almond oil
  • 5 drops of thyme essential oil
  • Hot water

You'll also need the following supplies:

  • Towel
  • Plastic cap (Substitute with plastic wrap or a plastic bag)
  • Heat-friendly bottle or glass container
  • Pot for boiling

Instructions:

Step 1: Boil a pot of hot water. As it boils, use this prep time to set up your space. Detangle and section your hair, mix your oils in a heat-safe container, and place a hot towel on your shoulders to keep clean. 

Step 2: Once the water is boiled, place your container into the water and wait two minutes for the oils to warm up. 

Step 3: Remove the container and use the oils inside to massage your scalp for 5 minutes. Make sure you thoroughly massage your scalp and moisturize your ends. 

Step 4: Once you've finished your treatment, apply a shower cap to your head. Once you have your cap on, soak the towel in hot water and ring it out until it's damp. Then wrap the damp towel around your head.

Step 5: Wait 30 minutes and rinse out your hair.

Benefits of This Recipe

You can use this method as a quick pre-poo recipe. There's no reason to use this method for an overnight hair treatment due to the heat from the towel and the shower cap. Besides, you probably don't want to sleep with a wet towel on your head anyway.

Related Articles

  • How to Use Black Seed Oil for Hair Growth
  • Tea Tree Oil for Scalp
  • Neem Oil Benefits for Hair
  • How to Use Jojoba Oil for Hair

Does Castor Oil Make Straight Hair Curly?

There is no scientific evidence to suggest that castor oil can make straight hair curly. Hair texture and curl pattern are determined by genetics and cannot be changed by using a particular product. However, people with naturally curly/wavy hair say that castor oil can help enhance their curl pattern, as it provides hydration and nourishment to the hair.

Does Castor Oil Work on Low Porosity Hair?

Castor oil can work well on low-porosity hair, as it is a heavy and thick oil that can penetrate deeply into the hair shaft. Castor oil can help to moisturize and soften the hair, making it more pliable and easier to style. However, use castor oil sparingly on low-porosity hair, as too much can cause buildup.

Is Castor Oil Good for High Porosity Hair?

Castor oil can have benefits for high porosity hair because it helps to seal in moisture and prevent further damage. High porosity hair tends to have a damaged cuticle layer, which can lead to excessive moisture loss and breakage. Castor oil can help to strengthen and protect the hair, reducing the risk of breakage and split ends.

Is Jamaican Black Castor Oil Good for Hair?

Jamaican black castor oil is rich in nutrients and fatty acids that can help to promote healthy hair growth. It can moisturize and nourish the hair while also stimulating blood flow to the scalp, which helps promote hair growth. Results may vary depending on hair type and texture, but most people find it thickens and strengthens their hair.

Where to Buy Castor Oil for Hair?

Castor oil is available at most major retailers, although we tend to recommend Amazon.com due to good customer service, competitive prices, and international shipping.

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About Kenneth Byrd

Kenneth Byrd, with a BS in Accounting and Management Information Systems and an MBA from the University of Alabama at Birmingham, has over 15 years of experience and is a recognized authority in hair care. Co-founder of Curl Centric® and Natural Hair Box, Kenneth has dedicated himself to promoting ethical and scientifically-backed hair care practices. Rigorous editorial guidelines, industry recognitions, and features in numerous media outlets evidence his expertise. Kenneth’s commitment to transparency, quality, and empowerment has positioned him as a trusted voice in the field, empowering readers to confidently embrace their natural beauty.

Kira Byrd wearing short pixie cut

Hey, I'm Kira!

Curl Centric is a curly hair blog created by husband-and-wife team Kenneth and Kira Byrd. With over 15 years of experience and a community of 10,000+ daily readers, we share trusted techniques to help you embrace and care for your natural curls with confidence.

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