I have too heard a lot about Castor oil. It seems so thick. I have searched for a scalp oil that easily penetrates the scalp and doesn't leave a heavy, look to my hair. Applying it at night helps, esp around thinning edges, absorbs on its on time without much interruption-except a little tossing and turning. Check it out: it's by Exotic Allure, maker of Fast Grow Black Hair Vitamins. Hair Grow Oil