Any colour treatment, especially one that uses bleach or double-processing to lighten hair, can leave hair stripped of more than just your natural colour. If that sounds like something you're currently facing (or proactively want to avoid facing), this Reverie Milk Anti-Frizz Leave-In Nourishing Treatment ($42) can be used daily to keep hair conditioned and silky. There's sweet almond protein for moisture, amino acids to protect colour, and other oils and natural ingredients for extra softness and shine.