Cold pressed castor oil is a thick, pale yellow oil with dozens of uses ranging from hair treatments to skin moisturizing to digestive relief. The “cold pressed” label means the oil was extracted without heat, which preserves more of its natural compounds, particularly ricinoleic acid, the fatty acid responsible for most of its benefits. How you use it depends entirely on what you’re trying to accomplish, so here’s a practical breakdown of the most common applications.
Hair and Scalp Treatments
This is the most popular use for cold pressed castor oil, and the process is straightforward. Start by parting your hair into sections and applying a small amount of oil directly to your scalp using your fingertips or a dropper bottle. Massage it in with circular motions for two to three minutes to improve circulation. Then work the remaining oil down through the lengths of your hair, focusing on dry or damaged ends.
Leave the oil on for at least 30 minutes. For a deeper treatment, you can leave it on for several hours or overnight (protect your pillow with a towel or old pillowcase). When it’s time to wash it out, shampoo thoroughly. Castor oil is extremely thick, so you’ll likely need to shampoo twice to fully remove it. Follow with your regular conditioner.
Once a week is a good frequency for a full scalp and hair treatment. If you want to use it more often, stick to a very small amount applied just to your ends as a leave-in conditioner. Consistency matters more than intensity here. Weekly treatments over two to three months will give you a much better sense of results than sporadic heavy applications.
Eyelashes and Eyebrows
Applying castor oil to your lashes and brows requires a lighter touch and more caution. Dip a clean cotton swab or a clean mascara spoolie into a small amount of oil, then run it gently along the top of your lash line or through your eyebrows. The key rule: make sure none drips into your eyes. Castor oil can cause irritation and blurry vision if it contacts the surface of your eye directly.
Do this at night before bed so the oil has hours to absorb. Use a minimal amount. If you’re using a spoolie, wipe off the excess before applying. The American Academy of Ophthalmology recommends using only sterile products near the eyes, so keep your application tools clean and don’t share them. If you experience redness, itching, or swelling around your eyes, stop using it.
Skin and Face
Cold pressed castor oil scores a 1 on the comedogenic scale (which runs from 0 to 5), meaning it has a very low likelihood of clogging pores. That makes it suitable for most skin types, including oily and acne-prone skin, though everyone’s skin reacts differently.
For facial use, less is more. After cleansing your face at night, place two to three drops of castor oil on your fingertips, rub your hands together to warm it, and press it gently into your skin. You can use it alone or mix it with a lighter carrier oil like jojoba or rosehip to make it easier to spread. Castor oil is high in ricinoleic acid, which has natural anti-inflammatory properties, making it particularly useful for dry, irritated patches.
For body skin, you can apply it more liberally. It works well on rough areas like elbows, knees, and heels. Some people also use it on cuticles and nails by rubbing a drop into each nail bed before sleep. If you have very dry skin, mixing castor oil with a richer oil like avocado or almond oil creates a more emollient blend. If you have oily skin, pair it with something lighter like grapeseed oil instead.
Before using castor oil on your face for the first time, do a patch test. Apply a small amount to your inner forearm, wait 24 hours, and check for redness or irritation.
Castor Oil Packs
Castor oil packs are a traditional remedy where oil-soaked cloth is applied externally to the abdomen or other areas to ease discomfort. Here’s how to make one:
- Prepare the cloth. Cut cotton flannel into a rectangle roughly 12 by 10 inches. You’ll want three to four layers stacked together so the pack holds enough oil.
- Soak the flannel. Pour castor oil into a shallow container and submerge the cloth pieces until they’re fully saturated and dripping.
- Apply to skin. Place the soaked pack directly on your skin over the desired area (most commonly the lower abdomen).
- Cover and heat. Lay a small sheet of plastic wrap over the pack to protect your clothing and furniture. Place a hot water bottle or heating pad on top to drive warmth into the pack.
- Rest for 45 to 60 minutes. Lie down and relax while the pack does its work.
When you’re done, remove the pack and wipe your skin clean with a warm damp cloth. The flannel can be stored in a sealed container or zip-lock bag and reused several times before replacing it. Add a little extra oil before each reuse to keep it saturated.
As a Laxative
Castor oil is FDA-recognized as a stimulant laxative. It works by triggering contractions in the intestinal muscles, which moves things along. The adult dose is 15 to 60 milliliters (roughly 1 to 4 tablespoons) taken as a single dose. For children ages 2 to 11, the dose is 5 to 15 milliliters.
Fair warning: it tastes unpleasant. Mixing it into a small glass of juice or chilling it beforehand can help. Effects typically begin within two to six hours, so plan accordingly. This is meant for occasional constipation relief, not regular use. Frequent use of stimulant laxatives can make your bowels dependent on them over time.
Who Should Avoid Castor Oil
Pregnant women should not take castor oil internally. Ricinoleic acid binds to receptors in smooth muscle tissue and promotes the production of compounds that can stimulate uterine contractions. While some hospitals have studied castor oil for labor induction in controlled settings, clinical guidelines do not recommend it for this purpose due to insufficient evidence on safety. Common side effects in these studies included diarrhea and nausea, and serious complications like uterine rupture, though rare, were documented. Researchers who studied it were clear: castor oil should never be used for labor induction outside of a hospital setting with full emergency capabilities.
People with inflammatory bowel disease, intestinal blockages, or unexplained abdominal pain should also avoid taking castor oil internally. For topical use, stop if you notice a rash, persistent redness, or worsening skin irritation after your patch test or initial applications.
Storage and Shelf Life
Cold pressed castor oil lasts longest when stored in a cool, dark place with the cap tightly sealed. A cupboard or pantry away from direct sunlight is ideal. Most bottles will stay fresh for one to two years. If the oil develops an off smell, changes color significantly, or becomes cloudy in a way it wasn’t before, it’s time to replace it. Using a dark glass bottle helps protect it from light degradation if you’re transferring it from the original container.