SUBRINA RECEPT shampoo against dandruff and hair loss DOUBLE POWER contains the active ingredient piroctone olamine which prevents stubborn dandruff from forming, prevents it from recurring and doesn’t damage the natural oils of a healthy scalp. Coffee extract invigorates the hair roots, thereby stimulating hair growth and preventing early hair loss. At the same time, it also nourishes the hair and restores the hair's volume and shine.