How castor oil works for hair? Is this helpful for the hair loss? I used castor pil in childhood. No am 21 years old. My problem is hair loss. I went with some biotin supplements and also onion mask. But not stopped. I stopped to use everything. Now m feeling that I think blood circulation problem thats why its not regrowing and its falling. In past I had thick and long hair which was attracting everyone. I was depressed a lot. But not now. So m trying the last thing castor oil. So is this helpful for blood circulation to the hair.