Rosemary water is believed to have positive effects on hair. It is thought to stimulate healthy hair growth, reduce dandruff, combat oil, relieve itchy scalp, and improve hair strength and shine
. Rosemary oil, extracted from the rosemary plant, is known to have antimicrobial, anti-inflammatory, and antioxidant properties that can promote hair growth and prevent breakage
. However, taking undiluted rosemary oil or large amounts of rosemary leaf internally can be unsafe and may cause side effects such as vomiting and sun sensitivity
. When applied to the skin, rosemary oil is possibly safe for most people, but it might cause allergic reactions in some individuals
. It's important to use rosemary water or oil with caution and consult a dermatologist, especially if you have sensitive skin or are prone to allergies
