4 Ways Castor Oil May Boost Your Hair Health

Derived from the seeds of the castor bean plant, castor oil contains omega fatty acids and bioactive compounds that may be beneficial for your hair. Although research is limited, some evidence suggests that castor oil may help moisturize and protect hair, manage dandruff, and promote growth.

Jump to Key Takeaways.

1. Protects Hair

Fatty acids and other compounds found in castor oil are thought to nourish and protect hair.

Research shows that castor oil’s omega-6 and omega-9 fatty acids may penetrate the hair follicle (found in the scalp) and provide nutrients that protect the hair. There is also evidence that ricinoleic acid has antimicrobial effects that may also protect hair and keep it healthy.

Additionally, castor oil has been found to contain various types of antioxidants, including tannins and flavonoids. These and other antioxidants protect the body from unstable molecules called free radicals and other potentially harmful substances.

2. Moisturizes Hair

Castor oil may act as a natural moisturizer for your hair.

Castor oil is considered an occlusive moisturizer. It forms a protective layer over hair by absorbing and retaining moisture. Ricinoleic acid and other fatty acids in castor oil are thought to provide these moisturizing effects.

While few studies compare castor oil to traditional hair conditioners, castor oil may likely provide longer-lasting moisture to hair. However, more research is needed.

3. Promotes Hair Growth

Some people use castor oil for hair growth, but scientific evidence supporting this use is limited.

According to laboratory research, the ricinoleic acid in castor oil may penetrate the scalp and help prevent hair loss, promoting hair growth.

Additional research shows that omega fatty acids and antioxidants (like the ones in castor oil) may also promote hair growth. In one study, they were found to increase hair density and minimize hair loss. However, it should be noted that the study was not performed using castor oil.

Anecdotal evidence (based on reports or hearsay) exists that castor oil makes their hair grow longer and thicker, but scientific evidence is needed to back up these claims

4. Manages Dry Scalp and Dandruff

As a natural moisturizer, castor oil may help with dry scalp and dandruff management.

While research on the subject is limited, some experts believe castor oil may help nourish and moisturize the scalp, leading to less dandruff. The antimicrobial effects of castor oil may also help keep dandruff and dry scalp at bay.

Further research is needed to prove how castor oil may manage dry scalp and dandruff.

What Is Castor Oil?

Castor oil is a vegetable oil from the Ricinus communis plant, which is widely grown in Africa, India, and South America.

The seeds of the castor plant are pressed to extract castor oil. The oil is a thick liquid and is yellow in color.

Castor oil may have various medicinal uses, but its most popular use is as a laxative (when ingested). It is considered a renewable resource with commercial uses in soaps, lubricants, coatings, and more.

Ricinoleic acid is the main compound found in castor oil, making up about 90% of the oil. Castor oil is also a source of omega fatty acids, including:

• Linoleic acid
• Oleic acid
• Stearic acid
• Linolenic acid

In addition to its fatty acid content, castor oil has also been found to possess antioxidant, anti-inflammatory, antimicrobial, and antiviral properties.

How to Use Castor Oil in Hair Care

There are no set rules regarding the use of castor oil for hair care, but you should keep a few things in mind before getting started.

• Start small: Castor oil should be used in small amounts due to its oily nature. Applying just a few drops of castor oil in your hair at a time is best.
• Thin it out: Castor oil is very thick. You may consider mixing it with another oil, like coconut or olive oil, as this is said to help thin castor oil. Mixing castor oil with another oil may reduce the risk of build-up on your hair and scalp.
• Apply properly: To apply castor oil, massage it thoroughly into your scalp.
• Let it sit: After applying, let it sit for some time (typically, at least 15 minutes is recommended).
• Wash and rinse thoroughly: Wash your hair with shampoo and water to remove castor oil. Leaving castor oil in your hair too long may lead to build-up or matting.
• Limit frequency: Although more research is needed, only castor oil in your hair is typically recommended once a week.

Drawbacks and Precautions

• Generally safe: Although castor oil is generally considered safe for hair, it may have a few drawbacks and precautions.
• Skin irritation: Some people may experience skin irritation when using castor oil on the skin. Although rare, castor oil may cause allergic contact dermatitis, a condition marked by skin inflammation, redness, and/or itching. Allergic contact dermatitis is not contagious.
• Risk of building up and matting hair: There is also evidence that castor oil may cause build-up and hair matting (also known as hair felting) in some people, but this is extremely rare. Hair matting may be more likely if you misuse castor oil.
• Avoid on broken skin: Castor oil should not be used on irritated or infected skin. You should also avoid putting castor oil on your hair if you have any open wounds on your scalp.
• Not for ingestion: Castor oil is not thought to be absorbed by the skin when used topically. However, ingesting castor oil may cause additional side effects, like diarrhea, nausea, and labor induction in those who are pregnant.
• Talk with your healthcare provider: If you have any health conditions or general concerns about using castor oil in your hair, talk with a healthcare provider first.

Key Takeaways

• Use sparingly: Castor oil is very thick, so apply it in small amounts or dilute it with a lighter oil like coconut or olive oil to avoid build-up and tangling.
• Watch for reactions: While generally safe, castor oil can cause scalp irritation or matted hair in some people—discontinue use if you notice any adverse effects.
• Consult your healthcare provider: Before starting regular use, speak with a healthcare provider or dermatologist to ensure it’s appropriate for your hair and scalp type.