Castor Oil is mildly comedogenic. It means that if this ingredient is present in any product, it is somewhat likely to cause acne or pimples. If your skin is severely acne prone, you should not be using a product that contains this ingredient.
Comedogenic ingredients are pore-clogging and can cause breakouts.
Even if a single ingredient such as Castor Oil in a skincare or cosmetic / makeup product is comedogenic, that becomes its weakest link, rendering the product as a whole comedogenic. Manually checking an ingredient list for the presence of comedogenic ingredients can be tiresome.
Enter Acne Mantra Skingredients, a free online tool anyone can use to find out instantly if a skincare or makeup product contains comedogenic or acnegenic ingredients. With Skingredients, you can also check if a single ingredient like Castor Oil is comedogenic.
There is also a smartphone version of Acne Mantra Skingredients. Get Skingredients on your Android smartphone.
Depending on your Acne Prone Skin Type (1, 2 or 3), an ingredient may block your pores more or less depending on its comedogenicity. You need to be aware of these acne causing ingredients that may cause or aggravate acne.
Many comedogenic cosmetic ingredient lists rate comedogenic ingredients on a scale of 1-5, with 5 being the most comedogenic. In real life, comedogenicity does not vary at such a fine scale. You are better off using a more practical scale such as non-comedogenic, mildly comedogenic and highly comedogenic.
Castor Oil is known to be irritating to the skin. Skin irritants may cause acne even if they are not pore-clogging. This is because they irritate the skin causing it to produce more sebum which may result in acne.
Castor Oil is mainly used as an emollient, antimicrobial and skin conditioner in cosmetic products.