The Original Leave-In Caffeine Hair TreatmentAlpecin Caffeine Liquid is the pioneering leave-in hair tonic that started the caffeine hair care revolution. Applied directly to the scalp after washing, its high-dose caffeine solution penetrates to the hair roots to stimulate follicles and combat hereditary hair loss throughout the day.Clinically tested and developed by the Dr. Wolff Group — a daily ritual for men serious about keeping their hair.☆ Benefits: High-dose caffeine leave-in treatment, stimulates hair follicle activity, extends hair growth cycle, easy dropper application, no rinsing required, clinically tested, trusted anti-hair-loss solution.☆ Use: After washing and towel-drying hair, apply the liquid to the scalp using the dropper. Massage in. Do not rinse. Use daily.☆ Volume: 200 ml. / 6.76 fl oz