Rosemary oil can be inhaled or applied topically. It’s pretty concentrated, which means you should only use a several drops at a time. The smaller bottles in which it’s bought consist of plastic droppers that make it simpler to dispense single droplets. When doubtful, a specialist can offer customized advice. 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/