The best kind of oil for hair growth depends on the qualities of each person's hair. Castor oil is ideal for those who lack nutrients, and olive oil is best for those with poor scalp health or hair loss caused by the hormone DTH, according to Trina Remedios for Healthmeup.
Castor oil provides vitamin E and fatty acids the hair needs to grow, explains Remedios. Olive oil promotes scalp circulation and reduces the release of the hormone that causes hair loss. Both oils have properties that combat dandruff and each improves the look and feel of hair in different ways. Castor oil nourishes the roots and prevents split ends, while olive oil hydrates hair adding softness and shine.
Either oil can be massaged into the scalp, note Remedios. Castor oil should be shampooed out twice after application. This can be done immediately or after sleeping with the oil in, as long as a towel is placed between the hair and the pillow to prevent stains. Olive oil needs to be locked into the hair by wrapping the hair in a hot towel after application. Some of the benefits of olive oil can be enjoyed simply by consuming it, but direct application is recommended for fighting dandruff.