It is known to enhance cognitive function, memory, and focus. Inhaling rosemary oil can stimulate brain activity and improve alertness. It is widely used to promote hair growth, reduce hair loss, and treat dandruff. Rosemary oil has calming properties that help reduce stress, anxiety, and symptoms of depression. Its fresh scent can promote relaxation and emotional balance. Rosemary oil can be used to protect the body from bacterial and fungal infections. It can be applied to wounds or used in homemade disinfectants.