Rave review: “I have fine naturally gray hair which is glossy and shiny owing to this oil. There's a great deal of regrowth also which is great.” Even though Dr. Bhanusali has not noticed evidence to guidance the concept rosemary oil thickens hair, that doesn’t imply it might't, he states. 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/