Our onion hair oil contains onion extract, black seed extract, argan oil. It can stimulate hair follicle activity, promote new growth, and make hair thicker. The way to use it is simple: 1. Wet your hair; 2. Apply appropriate amount to scalp evenly. 3. Massage gently to promote absorption, then rinse thoroughly. Strengthen hair roots, reduce hair loss, enhance hair toughness, prevent hair breakage and loss.