Castor Oil: Comedogenic Rating & Safety Profile
Also known as: Ricinus Communis Oil
A thick, viscous oil rich in ricinoleic acid. Used as an emollient, conditioner and the base of oil cleansing methods.
Quick facts about Castor Oil
Low Risk
0 = won't clog pores · 5 = highly pore-clogging
Low Risk
0 = inert · 5 = often irritating
Oils
Generally considered safe
Typically yes
Ricinus Communis Oil
Quick verdict
Castor Oil is a oil with a low risk comedogenic profile (1/5) and low risk irritancy (1/5). A thick, viscous oil rich in ricinoleic acid. Used as an emollient, conditioner and the base of oil cleansing methods.
What is Castor Oil?
Castor oil is a thick, viscous oil pressed from the seeds of the Ricinus communis plant. Its defining component is ricinoleic acid — a hydroxylated fatty acid that gives the oil its distinctive viscosity, mild antimicrobial activity and humectant properties. Castor oil has been used in folk medicine for centuries and is widely used in cosmetics as a base for oil cleansers, lash and brow conditioners and lip products.
Comedogenic Rating: What 1/5 Means for Your Skin
Castor oil is rated 1/5 comedogenic. Used neat on facial skin it can feel heavy and contribute to congestion in some users, but in oil-cleansing blends (typically 30% castor + 70% lighter oil) it is generally well-tolerated.
Benefits for skin
- Antimicrobial properties
- Excellent for oil cleansing
- Conditions brows, lashes and hair
Potential side effects & who should avoid it
Castor oil has a 1/5 irritancy rating. Allergy is rare. The main practical concerns are heaviness on facial skin and the strong gut-stimulating effects if accidentally ingested. Pregnant users should not consume castor oil — but topical use on skin and hair is fine.
Best for
- All skin types
- Combination
- Oily (cleansing only)
Avoid if
- Pure leave-on application on the face for some users
How to use Castor Oil safely
For oil cleansing, dilute castor oil 1:3 with a lighter oil like jojoba or sunflower. As a brow or lash conditioner, apply a tiny amount with a clean wand at night.
Commonly found in
Castor oil is in oil cleansers, lip balms, lash and brow serums, hair growth oils and many lipsticks.
Found Castor Oil in your skincare?
Paste the full ingredient list into our INCI Analyser to see how this ingredient interacts with everything else in the formula.
Frequently asked questions
Other oils to know
Squalane
A stable, saturated oil that mimics the skin's natural sebum. Modern squalane is derived from sugarcane or olives, not sharks.
Coconut Oil
A rich, semi-solid plant oil high in saturated fats. Effective on the body and hair but notorious for clogging facial pores.
Jojoba Oil
Technically a liquid wax ester rather than a true oil. Its molecular structure is almost identical to human sebum.
Argan Oil
A nutrient-dense oil from Moroccan argan trees, rich in oleic acid, linoleic acid and tocopherols.
Want the full picture on pore-clogging ingredients? Read our complete guide to comedogenic ingredients for the dermatology research behind the 0–5 scale and the full list of high-risk ingredients to avoid.
Written by ScanSkinAI Team · Last updated May 2026
This information is for educational purposes only. Always patch-test new products and consult a dermatologist if you have specific skin concerns.