Dr. Barbara Sturm 's 'Clarifying Mask' is specially developed for blemish-prone skin. Made with 20 years of clinical input, it's formulated to combat signs of ageing and key causes of acne, with plant-based extracts that strengthen the dermis' barrier and promote balance, and Zinc to counteract breakouts. ; Anti-ageing mask for blemish-prone skin, Smooth over the face after cleansing, leave for 10-15 minutes then rinse. Use two to three times a week, Balloon Vine, Viper's Bugloss and Sunflower strengthen permeability barrier, Free from synthetic fragrances, parabens and mineral oil