Essential Oil: The C1 Caffeine Essential Oil is enriched with natural nourishing ingredients like ginger extract, ginseng extract, and grape seed oil. This oil is designed to infiltrate hair follicles, repair dormant ones, and increase nutrient absorption to accelerate hair growth. It should generally be diluted with shampoo or used as a pre-shampoo treatment, not applied directly to the scalp overnight. Usage: For best results, the shampoo should be left on the scalp for at least two minutes before rinsing to allow the caffeine to penetrate the hair follicles. Regular and consistent application is recommended to see noticeable effects, typically within three months.