Castor Oil Benefits as a Laxative, Skin Moisturizer & Beyond

For centuries, at the first sign of illness, many parents and grandparents would immediately turn to giving their children castor oil, either topically or internally, to naturally boost immune function and speed up healing, among other castor oil benefits.

What is castor oil used for today? As shown below, it has natural stimulant laxative properties and may be able to boost lymphatic, circulatory and immune health. It also may help with constipation and arthritis, among other castor oil benefits for skin, hair and beyond.

What is castor oil?

Castor oil is a non-volatile fatty oil that is derived from the seeds of the castor bean (Ricinus communis) plant, aka castor seeds. The castor oil plant belongs to the flowering spurge family called Euphorbiaceae and is mainly cultivated in Africa, South America and India. (India accounts for over 90 percent of this oil’s exports globally.)

It’s very thick with a color that ranges from clear to amber or somewhat green. It’s both used topically on the skin and taken by mouth. (It has a mild scent and taste.)

Studies suggest that many castor oil benefits come down to its chemical composition. It’s classified as a type of triglyceride fatty acid, and almost 90 percent of its fatty acid content is a specific and rare compound called ricinoleic acid.

Ricinoleic acid is not found in many other plants or substances, making the castor plant unique since it’s a concentrated source.

Aside from its primary constituent, ricinoleic acid, this oil also contains other beneficial salts and esters that mainly act as skin-conditioning agents. Compounds found in castor can help stabilize the texture and consistency of products, which is why castor oil is used in so many cosmetics, hair and skin care treatments.

Indeed, research studies have found that castor oil contains therapeutic components including fatty acids, flavonoids, phenolic compounds, amino acids, terpenoids and phytosterols. These various compounds give the oil the following properties and potential health benefits:

• Anti-diabetic
• Anti-inflammatory
• Antimicrobial
• Antioxidant
• Hepatoprotective (ability to prevent damage to the liver)
• Free radical scavenging
• Wound-healing

Types

Castor oil can be used in several ways: orally (taken by mouth), applied topically on the skin, applied to the hair or massaged into the skin in the form of a castor oil pack.

Remember, any oil you ingest or consume (and even the kinds you apply directly to your skin) should be of the highest quality to ensure safety and effectiveness.

Where can you buy castor oil products? Ideally look for a reputable brand of cold-pressed, pure, organic castor oil at your local health food store or online if you can’t find it in stores.

Here are some of the most common types of castor oils you may find in stores:

• Cold-pressed castor oil. This type is produced by cold-pressing the castor bean seeds to extract their natural oil content. This results in a high-quality product that is recommended for internal use. You may also want to check that the oil is pesticide-free, paraben-free, phthalate-free and free of artificial color or fragrances.
• Yellow castor oil. This type is made from the castor bean, usually through pressing with no heat involved, although some manufacturers use chemicals in their processing. Generally speaking, the lighter color the oil is, the “purer” the product is.
• Jamaican black castor oil. This oil is developed by first roasting the castor beans, which results in a dark color (and burnt smell). This is the method that is traditionally used in Jamaica. Ash found in this type results in a higher pH (alkaline) product that is believed to have more clarifying properties that may help open pores.

Nutrition facts

Packed with fatty acids, most notably ricinoleic acid, this oil has long been used in natural health, wellness and beauty routines around the world.

Castor oil isn’t typically thought of as a food oil because of its strong taste and common use as a natural remedy rather than a cooking oil. However, understanding what’s in it helps explain why this oil delivers so many traditional benefits.

It contains fats, predominantly ricinoleic acid (a rare fatty acid), along with small amounts of omega‑6 and omega‑9 fatty acids. There are also trace amounts of vitamin E in this oil.

Ricinoleic acid is the compound most associated with castor oil’s biological effects, including its use as a laxative and potential topical castor oil benefits.

What are the top castor oil benefits?

1. Acts as a laxative and relieve constipation

One of the most time‑tested and recognized uses of castor oil is for temporary constipation relief. Ricinoleic acid stimulates intestinal muscles, helping move stool through the digestive tract more quickly.

Studies indicate that castor oil works like a natural, mild stimulant laxative when taken orally. It can provide constipation relief, reduce straining during defecation and enhance the feeling of complete evacuation after a bowel movement.

In fact, the Food and Drug Administration (FDA) has approved castor oil for use as a laxative.

Its active ingredient, ricinoleic acid, gets released into the intestine, where it helps with the process of digestion, nutrient absorption and cleansing the system. It increases movement of the muscles that push material through the intestines, helping pass a bowel movement.

One study looked at the effects of castor oil packs on elderly people experiencing constipation. The study participants were monitored for a week before, three days during and four days after the oil pack administration.

Eighty percent of the individuals studied had been experiencing constipation for 10 years or longer. The researchers found that the oil packs were able to decrease constipation symptoms, most specifically straining during defecation.

Consult your healthcare professional before using long term, as it may lead to complications. Also be aware that side effects of ingesting castor oil may include diarrhea and abdominal cramping.

2. Moisturizes skin and protects skin health

Because it’s rich in fatty acids, castor oil acts as a deep moisturizer that can help reduce dryness and soothe irritation.

This oil is completely natural and free of synthetic chemicals (as long as you use pure 100 percent pure oil, of course), yet it’s rich in skin-boosting ingredients. In particular, its main monounsaturated fatty acid is ricinoleic acid, which possesses moisturizing properties.

A small clinical trial published in the Journal of Cosmetic Dermatology found that applying a castor oil-based cream to the under‑eye area twice daily for 2 months significantly reduced melanin levels, darkness, and signs of skin laxity and wrinkles in patients with infraorbital hyperpigmentation. This suggests this oil may improve skin tone and appearance partly by enhancing hydration and barrier function to protect skin health.

Applying this oil to dry or irritated skin can help to discourage dryness and keep it well moisturized, since it prevents water loss. It can also be combined with select carrier oils to avoid any potential allergic reactions.

Regardless, it’s a good idea to do a small skin patch test first.

3. May boost wound healing

The antibacterial, antimicrobial and anti‑inflammatory properties of castor oil may help soothe skin, support healing, and create a protective barrier on wounds or dry areas.

Studies indicate that castor oil can boost wound and pressure ulcer healing thanks to its moisturizing, antimicrobial and antibacterial properties. In particular, its main component ricinoleic acid appears to help lower skin inflammation and support skin healing.

It mixes well with other ingredients like almond, olive and coconut oil, all of which have unique benefits for skin.

Lab studies have shown that castor oil benefits include being effective against many types of bacteria, including Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa. Out of all the staphylococcal bacteria, Staphylococcus aureus is considered the most dangerous and can cause mild to serious skin infections and other concerning staph infection symptoms.

4. May help induce labor

Historically used as a traditional aid to help start labor, some women report castor oil triggering uterine contractions, though clinical evidence is limited and pregnant individuals should consult a doctor first.

While not approved by the FDA and considered an off-label use, it may help induce labor in some women. For centuries, pregnant women at full term have taken it orally to help speed up uterus contractions.

According to studies, the reason castor oil can work to induce labor is due to the fact that the ricinoleic acid in the oil can activate EP3 prostanoid receptors in the uterus.

A 2018 observational case control study found that castor oil use produced a higher probability of labor within 24 hours after ingesting. Researchers noted, “Castor oil can be considered a safe non-pharmacological method for labor induction.”

In addition, the full-term women study subjects (between 40 and 41 weeks) who took the oil had a lower incidence of Caesarean section.

Regardless, the overall consensus is that castor oil needs to be researched further to prove that it is safe for pregnant mothers ready to give birth. In addition, it may cause nausea among these mothers, which is another reason why most hospitals do not approve its use.

Of course, consult with your healthcare professional before you consider using castor oil before giving birth.

5. May lower symptoms of arthritis and joint pain

Its natural anti‑inflammatory qualities make castor oil useful as a massage oil for sore muscles and joints. As such, it is often used to help relieve arthritis pain, joint swelling and inflammation.

It has natural anti-inflammatory properties that make it an ideal massage oil that can be applied to aching joints, muscles or tissue. Observational studies have shown that topical application of ricinoleic acid (the main component of castor oil), “exerts remarkable analgesic and anti-inflammatory effects.”

A randomized, double-blind, comparative clinical study looked at the effects of castor oil capsules on symptoms of knee osteoarthritis.

Subjects were either given a castor oil capsule (0.9 milliliters) three times daily for four weeks or a capsule of diclofenac sodium (50 milligrams) for the same amount of time. Overall, researchers found that castor oil worked as well as conventional treatment and can be used as “an effective therapy in primary knee osteoarthritis.”

6. Promotes hair growth and health

Castor oil is widely used in beauty routines for hair and scalp care. Its rich fatty acid content moisturizes the scalp, helps strengthen hair strands, and improves texture and flexibility, all of which can support an environment conducive to healthy hair growth.

While strong clinical evidence is limited, many people report improved hair thickness and reduced breakage when using castor oil for hair growth and health regularly.

For instance, in a randomized, placebo‑controlled clinical trial published in 2025 found that a blend containing castor oil (rosemary‑castor oil) applied topically for 90 days significantly increased hair growth rate, thickness, density and length compared to coconut oil. It also reduced hair fall, suggesting that castor oil within this formulation contributed to healthier, stronger hair and a more growth‑friendly scalp environment.

Risks and side effects

Before using castor oil, especially internally, keep in mind:

• It can cause cramps, diarrhea and nausea if taken in large doses.
• Some people may develop skin irritation or allergic reactions when applied topically.
• It is not recommended for chronic constipation or daily laxative use without medical guidance.

Reports show that this oil can be safely taken internally. When swallowed, it’s hydrolyzed in the small intestine by pancreatic enzymes, leading to the release of glycerol and ricinoleic acid, along with other beneficial metabolites.

Castor oil is classified by the FDA as generally recognized as safe for both topical and internal use. However, drinking castor oil may still potentially cause side effects.

Side effects can include abdominal cramping, nausea, vomiting and diarrhea, especially when used in large amounts.

Some people experience nausea and signs of mild irritation in their gut lining when taking castor oil. That said, it’s very unlikely to cause severe reactions as long as someone is not allergic and doesn’t overdose.

If you’re pregnant, you should not take castor oil to induce labor without speaking to your healthcare professional first. You should also avoid using it to relieve constipation during pregnancy.

Allergic reactions to castor oil (used topically or internally) are possible, so seek emergency medical care if you believe you are having a serious allergic reaction.

When using castor oil topically, it’s still best to start slowly and perform a skin patch test on a small area of your skin before applying larger amounts, and also keep it away from your eyes, inside of your nose, children and pets.

If you’re currently taking medication or have any medical condition, always speak with your healthcare professional before using castor oil.

Frequently asked questions

How should one use castor oil as a laxative ?

The dosage of castor oil taken internally depends on what you’re using it for, along with factors like your age, existing medical conditions and response to laxative-type treatments.

If taking castor oil orally, a commonly recommended dose for adults (such as to relieve constipation) is 15 to 60 mL, taken in one single dose. This is equivalent to about one to four teaspoons once per day. Many people mix it with water or another beverage before drinking.

Read package directions carefully before using castor oil or a castor oil pack kit. Be careful not to increase your dose above the recommended amount, start slowly and don’t take it for more than seven days consecutively, unless you’re told to do so by your healthcare professional.

Be aware that castor oil can work for constipation relief quite fast so it’s not recommended to take it before bed. For many people, taking it causes a bowel movement to occur within two to three hours, but it can take up to six hours.

How can castor oil be used for the skin?

Wash your face first in warm water to open up the pores. Then massage some of the oil into your face, and leave it on overnight, rinsing the next morning. If leaving the oil on your face overnight causes greasiness, reduce the amount of time until you rinse it off.

You can also mix one-quarter cup of castor oil and three-quarters cup virgin coconut oil (fractionated coconut oil is best), and then apply to your body and face. For oily skin, you may choose jojoba oil, grapeseed oil or olive oil instead.

Castor oil’s anti-inflammatory properties may also soothe a sunburn. Apply castor oil mixed with coconut oil (in a 1:1 proportion) to the affected area, or try the same remedy as a natural lip balm to solve chapped or sunburnt lips.

Does castor oil work for hair growth?

Castor oil is a popular natural remedy for hair growth and overall hair health. Its moisturizing qualities can help hydrate the hair shaft and simultaneously increase hair flexibility while lowering hair breakage.

There is some evidence that castor oil can stimulate hair growth or reduce hair loss. It also can be a moisturizer, as stated above, and may improve hair texture.

To use, massage several tablespoons of slightly warmed-up oil into your hair and scalp. You can try making a homemade hair mask by massaging the oil into your roots and spreading it all over your hair, tying up your hair and covering it with a cap, then leaving the oil on overnight before washing it out.

How can castor oil be used to alleviate joint pain?

The oil can be applied like any other over-the-counter analgesic (pain-relieving) cream and massaged into tense areas. Apply about a dime-sized amount every three hours or until pain subsides. Repeat every day for three days for best results.

You can also use castor oil packs or poultices. These might be able to help increase topical absorption through the skin’s pores. You can make your own easily or purchase a pre-made kit.

To make your own pack you’ll need a bottle of castor oil and a soft piece of fabric, such as flannel that can be found in health stores and online.

1. To make your own pack, saturate a piece of flannel, and place it over your abdomen or other painful areas. It takes approximately three to four ounces of castor oil to make one pack the size of a washcloth or small hand towel.
2. Wrap castor oil cloth around any painful area. Cover the oiled cloth with another hand towel or a plastic wrap to prevent oil getting on clothes or furniture.
3. You may want to also apply heat to support absorption.
4. Let the pack sit for one hour or more.
5. You can also massage the oil into any area where soothing is desired.

What is the history of castor oil?

Folk healers worldwide have used it to treat a wide variety of health conditions for thousands of years. For example, the reputed benefits of castor oil go as far back as the ancient Egyptians, who used it to treat eye irritations and as a powerful natural skin care remedy. It also has deep roots in India, where it’s considered to be a skin-healing, digestive-soothing, antibacterial ingredient that is utilized in Ayurvedic medicine.

What is another name for castor oil?

Castor oil is sometimes called ricinus oil, referencing its botanical name Ricinus communis. It may also appear as castor bean oil.

What is castor oil most used for?

The most common use of castor oil is as a natural laxative to relieve occasional constipation. It’s also widely used topically for skin and hair care.

What happens when you rub castor oil on your belly?

Some people use castor oil belly rubs or castor oil packs to support digestion, reduce bloating or stimulate bowel movements, though scientific evidence for topical belly applications is limited and primarily anecdotal.

Can I apply castor oil directly on my body?

Yes, castor oil can be applied directly for skin and hair benefits, but a patch test is recommended before widespread use, as some individuals may experience irritation.

When should you not use castor oil?

Avoid internal castor oil use during pregnancy unless under medical supervision. Do not use it for chronic digestive issues without a doctor’s advice.

Where should you not put castor oil?

Castor oil should not be placed in the eyes or mucous membranes, as it can cause irritation. Additionally, avoid putting it directly into the ears.

What does rubbing castor oil on your feet do?

Some traditional routines involve rubbing castor oil on the feet to help moisturize dry skin and support relaxation. There’s no strong research proving additional systemic effects, but it can help hydrate skin.

What is the difference between coconut oil and castor oil?

Both are plant‑derived oils, but castor oil is much thicker and higher in ricinoleic acid, while coconut oil contains more medium‑chain fatty acids and is lighter and more commonly used as a food‑grade oil. Their textures, uses and nutrient profiles differ significantly.

Can castor oil grow eyebrows and eyelashes?

While there’s limited scientific evidence proving castor oil directly stimulates new hair growth on eyebrows or eyelashes, many people use it to moisturize and condition lashes and brows, which can make them appear healthier and fuller over time.

Final thoughts

• What is castor oil? It is a non-volatile fatty oil that is derived from the seeds of the castor bean (Ricinus communis) plant.
• It can be used topically and also taken internally in small amounts, for a short duration of time.
• Benefits of castor oil uses include helping treat constipation, helping with wound healing, moisturizing dry skin, promoting hair health and potentially reducing joint pain.
• Castor oil comes in several forms you may see on shelves:
  • Cold‑pressed: High‑quality, often recommended for internal use.
  • Jamaican black: Roasted castor beans give it a darker color and unique properties.
  • Yellow: A lighter, often more refined type.