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Does Castor Oil Help With Hair Growth?

Updated on June 8, 2026 | 3 min read

Jaclyn LaBadia, Davines Writer


Quick answer: While there's no direct scientific evidence from clinical studies on castor oil helping with hair loss, it actually may. Castor oil’s potent antioxidant and antimicrobial properties keep free radicals from damaging the body's healthy cells. This destructive process is called oxidative stress, and it's been linked to hair fall.

Key Takeaways

What to Know About Castor Oil

  • Castor oil doesn’t sprout new hair instantly, but it cleanses the scalp and reduces breakage to create the ideal environment for growth.
  • Use cold-pressed castor oil for fine hair and a light touch, or Jamaican black castor oil for thick, coarse hair that needs deeper nourishment.
  • The oil is naturally thick and sticky. Mix it with a carrier oil like jojoba so it’s easier to spread and won't stain your clothes.
  • Use your fingers or a scalp massager during application. This stimulates circulation and helps the nutrients reach your follicles.
  • Castor oil is heavy and can clog pores if left behind. Always shampoo twice to ensure your scalp stays clean and buildup-free.

In This Article

What Is Castor Oil?
Castor Oil vs. Other Oils
Benefits of Castor Oil
How To Use Castor Oil
Tips for Enhancing Castor Oil’s Hair Growth Benefits
Side Effects and Precautions
FAQs
Use Castor Oil To Support Healthy Growth
combing damp brown hair

What Is Castor Oil?

Castor oil, also known as Ricinus communis, is a nutrient-rich vegetable oil from castor beans. Although it originates in tropical East Africa, it is widely used in India and the West Indies for cosmetic and medicinal purposes. Castor oil has a powerful mix of proteins, fatty acids (Omega 3, 6, & 9), vitamins, and antioxidants. This is the holy grail of hair nutrition ingredients, and the reason castor oil has increasingly become a key ingredient in hair products to combat hair fall and scalp concerns.
There are two different types of castor oils used to promote hair growth:
Cold-pressed castor oil: This less processed oil is lighter in color and best for fine hair and scalp deep conditioning. The castor beans are pressed without any heat, preserving their natural properties.
Choose This If: You have fine hair and an oily scalp
Jamaican black castor oil: Jamaican black castor oil uses heat for the extraction process, which changes its pH level and is said to have better hair growth properties because of it.
Choose This If: You have thick or coarse hair or want to focus on hair growth

Castor Oil vs. Other Oils

Castor oil and rosemary oil are the most popular oil options for hair growth, but these oils work differently. Here’s an easy breakdown of three:

Castor Oil

What it does: Nourishes the scalp and creates a healthier environment for new hair to grow
Active ingredient: Ricinoleic acid
Consistency: Thick, viscous
Scientific evidence: No significant evidence that it stimulates hair growth

Rosemary Oil

What it does: Stimulates blood circulation to hair follicles
Active ingredient: Carnosic acid
Consistency: Thin, runnier
Scientific evidence: Said to be as effective as Minoxidil

Rosemary Oil

What it does: Helps balance oil production on scalp and moisturizes hair strands
Active ingredient: Fatty acids
Consistency: Lightweight
Scientific evidence: Limited evidence for hair growth, but effective for scalp hydration and sebum regulation

Castor Oil
Rosemary Oil
Jojoba Oil

What it does
Nourishes the scalp and creates a healthier environment for new hair to grow
Stimulates blood circulation to hair follicles
Helps balance oil production on scalp and moisturizes hair strands

Active ingredient
Ricinoleic acid
Carnosic acid
Fatty acids

Consistency
Thick, viscous
Thin, runnier
Lightweight

Scientific evidence
No significant evidence that it stimulates hair growth
Said to be as effective as Minoxidil
Limited evidence for hair growth, but effective for scalp hydration and sebum regulation

Benefits of Castor Oil

Stimulates the scalp via ricinoleic acid: Improves blood circulation to hair follicles, anti-inflammatory, and antifungal. This supports growth conditions, but it doesn't directly cause new hair to sprout.
Deeply moisturizes and reduces breakage: Humectant and emollient properties draw moisture in and seal it. It also reduces split ends and snapping that make hair look like it stopped growing.
Combats dandruff and scalp buildup: Antifungal properties help with flaking and irritation for better scalp health. Healthy scalp conditions means a better environment for growth.
Adds shine and strengthens strands: Fatty acid content coats the cuticle, reducing frizz and improving light reflection.
Increases the absorption of other products: If used regularly in your hair care routine, castor oil will keep your scalp clean and clear so your other products, such as the Davines Nourishing Oil, can get to the hair shaft more effectively.
Seal in moisture and shine
Get glowing hair and skin with a multi-functional oil that locks in hydration, shine, and softness.


How To Use Castor Oil

Looking to nourish split ends, tame frizzy hair, or prevent hair loss? We’re breaking down how to use black castor oil for hair growth below.

1. Choose the right type of castor oil

When it comes to castor oil for hair growth, go for Jamaican castor oil. Because it opens up the hair's cuticle, using this on your scalp has the best absorption of the growth-happy ingredient ricinoleic acid.

2. Apply the oil to your scalp

It's best to dilute castor oil with a carrier oil, like jojoba oil or coconut oil, to thin the consistency and make it easier to use. Warm the mixture in your hands and use your fingers to massage it into your scalp and hair follicles.

3. Apply the oil to your hair

Next, work it through your hair from the root to the tip, squeezing it into your strands with your hands. Wrap your hair in a silk scarf after smoothing the castor oil onto your hair for deeper penetration and to protect your surroundings. Castor oil can stain anything it comes in contact with, so we suggest using a shower cap after you've applied it.
How long you leavecastor oil in your hair depends on your hair type. Fine and medium hair should be smoothed with castor oil through their mid-lengths and ends, leaving it on for up to 30 minutes before shampooing. Coarse, thick, and ultra-dry hair types, on the other hand, can leave castor oil in as an overnight treatment or smooth it over their ends as a leave-in.

4. Wash it out

Shampoo your hair and wash the oil mixture off. You’ll likely need to shampoo multiple times to get it all out. Once it’s out, use a hair towel to gently squeeze the water from your strands. Avoid using heat styling tools immediately after.

Tips for Enhancing Castor Oil’s Hair Growth Benefits

Make the most of your hair treatment with these stylist tips and tricks to enhance castor oil’s benefits for hair.
Stimulate blood flow: Use a scalp massager before applying oil. This increases scalp circulation and exfoliates the skin so that the oil can absorb more effectively.
Add other oils: You don’t have to choose between castor oil and rosemary oil. Mix in rosemary or jojoba oil. These oils contain the ingredients to stimulate hair growth, while the castor oil provides the ideal environment for it to grow.
Use heat: Use a hair steamer for 20 minutes after applying the hair strengthening oil. The heat opens the hair cuticle for deeper penetration and gets the maximum benefits.
Eat nutritious food: Eat high-protein and antioxidant-rich foods like eggs and salmon. Other foods like Brazil nuts and sweet potatoes contain vitamins and antioxidants needed for a healthy scalp and optimal follicle health.

Side Effects and Precautions

Like with any product, it’s important to do patch tests before introducing it fully into your hair care routine. Here are some common side effects and precautions to take when you start using castor oil for hair growth.
Allergic reaction or contact dermatitis: An allergic reaction or seborrheic dermatitis is rare but still possible. Do a patch test before using castor oil on your entire scalp and hair shaft.
Scalp buildup and clogged follicles: If you don’t wash the castor oil out fully, it can cause buildup on the scalp. Periodically, use the clarifying SOLU shampoo to deep clean your scalp.
Acne: If you have sensitive skin, the castor oil can cause breakouts. Carefully apply it to your scalp and avoid too much product near your forehead and temples.
Cleanse and clarify
Deeply clean and reset your hair and scalp to avoid castor oil buildup with SOLU Shampoo.


FAQs

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

The castor oil hair growth timeline varies scalp to scalp. Many people start to notice healthier hair after about 1-2 months of using castor oil on their scalp. If you are creating a healthy scalp environment and using a castor oil hair mask recipe that has active stimulating ingredients, you may notice hair growth after 3-4 months.

Do I apply castor oil to wet or dry hair?

You can apply castor oil to both wet and dry hair. When you apply castor oil to dry hair, you can use it as a scalp treatment and wash it out afterwards. When you apply castor oil to damp or wet hair, it can help lock in moisture. 

Does castor oil work for eyebrows and eyelashes?

Using castor oil for eyebrows is a great way to encourage growth. You can also use castor oil for eyelashes, but apply it carefully to prevent getting oil into your eyes. You can even use castor oil for beard growth.

How often should I use castor oil on hair?

It is recommended to use castor oil on your hair once or twice a week, depending on hair types. It’s important to dilute castor oil with a carrier oil, such as jojoba oil, for an easier spread and washout. But don’t worry, you can still get benefits from Jamaican castor oil benefits when using carrier oils. 

How do I get castor oil out of hair?

To get castor oil out of your hair, you should lather, rinse, and repeat. Since the oil is on the thicker side, it’s common to need two shampoos to get it all out. Be sure to use a clarifying shampoo if you feel like there is buildup on your scalp. 

Use Castor Oil To Support Healthy Growth

If you’re looking to add shine, prevent hair fall, and condition your hair, try adding castor oil to your hair care routine. This age-old Jamaican beauty secret has been used for centuries to moisturize the scalp hair and improve smoothness and strength, but it won’t make your hair grow on its own. Castor oil can nourish and strengthen long hair, combat dandruff and manage fungal infections of the scalp, detox and exfoliate, protect against breakage and hair loss, and make your other products work harder. These things all lead to a healthier scalp and the ideal environment to encourage hair growth. The bottom line is that with consistent use of castor oil, you should start to notice smoother, softer, stronger hair.

To speak to a professional about adding castor oil to your routine, book an appointment with a Davines stylist. And remember to use only high-quality hair products to care for and style your hair.
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2 Comments

2 Responses

Gloria burke
Gloria burke

January 15, 2024

Just applied it to my hair. Now I will post after I shampoo it out.

Said
Said

October 02, 2023

Good product deserve 100 % Good .

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