Massaging the oil into the scalp will increase blood circulation, which can strengthen hair growth. Applying oil to the scalp may also prevent dandruff. Rave review: “Much better than other castor oils. Grew my eyelashes so long and my child hairs are growing all around my front of my hair.” https://allhealthmarket.com/product/health-and-beauty-2/hair-care/biotin-hair-oils-for-hair-growth-anti-breakage-hair-growth-and-collagen-for-natural-hair-growth-anti-hair-loss/