Born in Gielly Green’s award-winning London salons, The One Hair System brings decades of professional expertise to a simpler, luxurious haircare ritual. Its philosophy, “Fewer is the future”, means one carefully developed product in each category, created by stylists, perfected in laboratories and validated in salons.

The Core provides the foundation, while targeted leave-in Boosters personalise your routine. A shared signature scent of citrus, florals, warm woods and musk connects the collection, bringing a touch of the salon experience into everyday care.

Apply one to two drops directly to targeted areas of the scalp, or three to four drops for full coverage. Massage gently and leave in without rinsing. Use daily as the targeted scalp-care step in your One Hair System routine.