The antimicrobial and anti-inflammatory properties of castor oil make it useful in reducing acne. Ricinoleic acid can inhibit growth in the bacteria that cause acne.

Castor oil is also rich in other fatty acids. These can enhance smoothness and softness when applied to facial skin. The fatty acids in castor oil can also promote the growth of healthy skin tissue, making it helpful in restoring uneven skin tones. Castor oil has a low comedogenic score. This means it is unlikely to clog pores in the skin and reduces the risk of developing blackheads, making it appropriate for use on sensitive skin.