Castor oil is an age old beauty treatment that has been largely replaced over time by fancier beauty products with more ingredients and a bigger price tag. Castor oil has natural antibacterial and antifungal properties and is high in Vitamin E, minerals, proteins, and Omega 6 and 9 beneficial fatty acids. Its unusually high ricinoleic acid ratio makes it beneficial to skin and hair. Castor oil can be very beneficial for hair growth if used correctly. Small amounts of plain oil can be used for an all-over treatment. Like many things in life, more is not always better, and only a few drops are needed per treatment. The additional oils are completely optional. I personally use this castor oil 1-2x per week. It can be used more often, though I did not see any increased results with using it daily.