Majestic Pure Castor Oil Eyelash Growth Serum consists of 100% pure, natural, and organic castor oil; can also be used on eyebrows Castor oil has been used for hundreds of years all over the world as a remedy to thinning, stunted hair, helps eyelashes and brows appear longer and thicker, as well as fight hair loss Safety Warning: For external use only. Rub a very small amount on the inside of your elbow area to test for any allergic reaction before use. Avoid contact with eyes, keep out of the reach of children. If pregnant, consult with your health care provider before use.