Castor Oil: The Viral Beauty Ingredient, Explained

Castor oil is having a bit of a comeback. Once something you’d find tucked away in the medicine cabinet, it’s now everywhere - from hair care and skin care to wellness routines and social media.

Made from the seeds of the Ricinus communis plant, castor oil is a thick, pale-yellow vegetable oil that has been used for thousands of years. It has a long history across different cultures, including ancient Egypt and Ayurvedic medicine.

Today, castor oil sits somewhere between traditional medicine and modern self-care. It’s been used as a digestive aid and is often promoted online as a natural solution for everything from hair growth to glowing skin.

But how much of this is actually backed by evidence?

In this guide, we’ll explore the many ways castor oil can be used, from nourishing your hair and skin to supporting everyday wellness rituals. You’ll discover its key benefits, how to get the most from this versatile oil, and simple ways to make it a valuable part of your self-care routine.

Castor Oil: Ancient Remedy, Modern Beauty Staple

Meet Ricinus communis: The Castor Plant

Castor oil comes from the seeds of the Ricinus communis plant, which is native to parts of the Mediterranean, Eastern Africa and India (source).

The seeds themselves contain ricin, a highly toxic substance. However, properly produced castor oil does not contain ricin because it is removed during the oil-production process (source).

What’s left is a rich oil made up mainly of fatty acids. Its particularly high concentration of ricinoleic acid is what gives castor oil its distinctive thick texture and many of its unique properties.

Ricinoleic Acid: The Powerhouse Behind Castor Oil

What makes castor oil different from oils like coconut oil or olive oil? A lot of it comes down to one key ingredient - ricinoleic acid.

Around 90% of castor oil is made up of this unique monounsaturated fatty acid (source). It’s thought to contribute to many of castor oil’s distinctive properties, including its soothing and moisturising effects.

Ricinoleic acid also plays a role in castor oil’s established use as a stimulant laxative, helping to encourage movement in the intestines.

So, while castor oil might seem like a simple plant oil, its unusual chemical makeup is what gives it many of the properties that make it so versatile.

Castor Oil & Digestion: What It Actually Does

The Science Behind Castor Oil’s Laxative Effect

Castor oil is an FDA-approved stimulant laxative used for the short-term relief of occasional constipation (source).

Once ingested, castor oil is broken down in the small intestine, releasing ricinoleic acid. This interacts with EP3 receptors in the gut, stimulating the muscles of the intestine and encouraging bowel movements.

The effect can be relatively quick, with a bowel movement typically occurring within 2–6 hours. It can be effective, but it’s also a fairly strong laxative, so it’s intended for occasional rather than regular use.

Before Using Castor Oil for Constipation

Because castor oil is a strong stimulant laxative, using too much or using it too often can cause cramping, diarrhoea, dehydration and electrolyte imbalances (source). Regular or prolonged use of stimulant laxatives can also lead to problems with normal bowel function.

Castor oil should not be used if you have, or may have, a bowel obstruction or appendicitis, and it may not be suitable for people with certain inflammatory or gastrointestinal conditions.

If you’re considering castor oil for constipation relief, particularly if symptoms are severe, persistent or unexplained, speak to a healthcare professional first.

Castor Oil for Skin: What Does It Actually Do?

For Dry Skin: The Moisture-Boosting Benefits

Castor oil is an occlusive, meaning it forms a protective layer over the skin that helps reduce transepidermal water loss and lock in moisture.

Its rich omega-9 fatty acid content makes it particularly useful for very dry, rough areas such as cracked heels, elbows and other areas prone to dryness. Because castor oil is thick and sticky, a little goes a long way. Apply it sparingly, or mix it with a lighter oil such as argan if you prefer a less heavy feel.

For Acne: The Anti-Inflammatory Evidence

Castor oil can be an interesting addition to an oil-cleansing routine, particularly for acne-prone skin. Rich in ricinoleic acid, it has properties that may help soothe the skin, while its oil-based texture helps loosen makeup, excess sebum and everyday buildup.

The key is to double cleanse. Massage a small amount of castor oil gently over dry skin to help dissolve oil-based impurities, then follow with a gentle facial cleanser to remove the residue. This leaves skin feeling clean and conditioned without relying on harsh scrubbing.

For acne-prone skin, this approach offers a way to incorporate castor oil into your routine while avoiding a heavy layer left on the skin. Use a small amount to start, and see how your skin responds.

For Skin Repair: Supporting the Skin Barrier

Castor oil has traditionally been used on wounds and irritated skin because its thick, occlusive texture can create a protective barrier while helping to maintain moisture.

Keeping a wound appropriately moist can support the skin’s natural healing process and help prevent the area from becoming excessively dry or cracked. Castor oil may therefore have a role in supporting the skin barrier and protecting dry, compromised skin.

For broken skin, however, it’s best to use sterile, pharmacy-grade products specifically designed for wound care.

For Anti-Ageing: Can It Help?

Castor oil is a rich, nourishing addition to an anti-ageing skin care routine. Naturally packed with fatty acids and antioxidant compounds, it can help protect the skin from environmental stress while supporting a healthy-looking complexion.

Its deeply conditioning, occlusive texture helps lock in moisture, leaving skin feeling softer, smoother and more supple. Well-hydrated skin naturally looks plumper, which can help soften the appearance of fine lines and give the complexion a fresh, dewy finish.

For dry or mature skin in particular, castor oil can be a simple way to add an extra layer of nourishment and moisture - helping skin look and feel smoother, healthier and more radiant.

Castor Oil for Hair: From Scalp Care to Growth

Can Castor Oil Help Soothe a Dry, Flaky Scalp?

Castor oil brings a little extra nourishment to your scalp-care routine, especially when your scalp feels dry, tight or uncomfortable. Naturally rich in ricinoleic acid, its thick, conditioning texture helps lock in moisture, soften dry skin and leave the scalp feeling more comfortable.

Think of it as a nourishing pre-wash treat for your scalp. Massage a small amount into your roots before shampooing, giving the oil time to condition the scalp and hair before you wash it out. It can be particularly useful when frequent washing, environmental exposure or chemical treatments leave your scalp feeling dry or stripped.

Because castor oil is naturally thick, a little goes a long way. Follow with a thorough shampoo to remove the residue, leaving your scalp feeling cared for and your hair soft and conditioned.

For Hair Growth: The Circulation Connection

Castor oil helps your hair look and feel its best. Rich in fatty acids, it coats the hair shaft to smooth frizz, boost shine and improve softness and manageability.

By reducing friction during brushing and styling, it may also help minimise breakage, leaving hair looking healthier, stronger and fuller.

Apply a few drops to your mid-lengths and ends as a pre-wash treatment. Leave for around 30 minutes, then shampoo thoroughly and condition as normal. Fine hair? Start with a little to avoid weighing it down.

While castor oil isn’t a proven hair regrowth treatment, it can help protect existing strands and keep them in great condition.

For Hair: Why Less Is More

Because castor oil is particularly thick and sticky, more isn’t better when it comes to hair. Applying too much can cause strands to stick together and become difficult to detangle, particularly if the hair is already dry or prone to tangling.

To make it easier to apply, mix a small amount with a lighter oil such as argan oil and start with just a few drops. Focus on the mid-lengths and ends rather than saturating the hair.

The Traditional Uses of Castor Oil

Castor Oil Packs: Supporting Your Wellness Routine

A castor oil pack is a simple wellness ritual made by soaking a flannel in castor oil, placing it over the abdomen and applying gentle warmth with a heating pad.

The combination of castor oil, warmth and gentle pressure may help support circulation, lymphatic flow and the body’s natural detoxification processes, while promoting a deep sense of relaxation.

It’s an easy, soothing ritual to add to your self-care routine - especially when you want to slow down, unwind and give your body a little extra care.

The Ayurvedic Tradition of Castor Oil

In Ayurveda (an ancient Indian system of traditional medicine), castor oil is known as Arandi ka tel and has been valued for centuries for its warming, nourishing and balancing properties.

Traditionally, it is used to help balance Vata dosha, which is associated with movement and is linked with dryness, stiffness and digestive discomfort when out of balance. Castor oil is also used topically as a massage oil to nourish dry skin and support comfortable, flexible joints.

How Castor Oil May Help Soothe Stiff, Aching Joints

Castor oil is a popular choice for massage, thanks to the naturally soothing properties of ricinoleic acid. Applied warm and massaged into the skin, it can help ease the feeling of stiffness, tension and minor muscle aches.

The combination of the oil, gentle warmth and massage can be particularly comforting after exercise or at the end of a long day, helping tired muscles and joints feel more relaxed and supple.

The Pechoti Method: Why Are People Putting Oil in Their Belly Button?

The Pechoti Method is a traditional natural wellness practice that involves applying oil to the belly button as part of a wider self-care ritual.

Some people use castor oil around the navel as part of their wellness routine, particularly to support:

• Bloating - especially in the evening or before menstruation
• Digestion - as part of a wider gut-friendly routine
• Sleep - as a calming addition to a consistent bedtime ritual
• Menstrual comfort - particularly for easing feelings of cramping
• Relaxation - helping create a calming ritual during stressful periods

Using a few drops of castor oil with gentle massage can make this a simple, soothing addition to an evening routine - a small moment to slow down and focus on your wellbeing.

For Menstrual Comfort: A Natural Approach

A warm castor oil pack applied to the lower abdomen can be a comforting addition to your period-care routine. Combined with gentle heat and pressure, it may help relax tense muscles and soothe feelings of menstrual cramps.

It’s a simple, nurturing ritual to reach for in the days around your period, giving you a little extra comfort when you need it most.

So, Is Castor Oil Worth the Hype?

Castor oil has earned its reputation as one of the most versatile natural oils around. From nourishing dry skin and conditioning brittle hair to soothing tired muscles and forming part of traditional wellness rituals. Its rich, protective properties make it a surprisingly useful addition to your everyday routine.

Its high concentration of ricinoleic acid gives the oil its distinctive texture and many of its unique properties. While its versatility means one bottle can have plenty of uses - from beauty and haircare to massage and self-care.

Getting the Most from Castor Oil

• Start small: Castor oil is rich and highly concentrated, so a little goes a long way - particularly on hair and skin.
• Patch test first: Apply a small amount to an area of skin before using it more widely, particularly on your face or scalp.
• Choose quality: Look for a high-quality, cold-pressed organic castor oil in an amber glass bottle.
• Make it part of your routine: Whether you use it as a hair treatment, body oil, massage oil or part of a relaxing castor oil pack, consistency is where it can really earn its place.

Castor oil may have been around for thousands of years, but there’s a reason it continues to be a staple in modern beauty and wellness routines. One simple, wonderfully versatile natural remedy - with plenty of ways to put it to work.